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`accessibilityUserInputLabels` is ignored on `UIBarButtonItem`
accessibilityUserInputLabels is working fine with any view I tried this on. Meaning that the control can be toggled with the provided alternative names when using Voice Control. When setting this property on any UIBarButtonItem though, it seems Voice Control ignores the alternative names provided by setting accessibilityUserInputLabels. For comparison, accessibilityLabel works perfectly when set on UIBarButtonItem. Is anyone facing the same issue? Using Xcode 16.0 (16A242) on iOS 18
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673
Aug ’25
How to undisplay `Private Access` in `Contacts Access` when i use `CNContactPickerViewController`?
In iOS 18, i use CNContactPickerViewController to access to Contacts (i know it is one-time access). After first pick up one contact, the Setting > Apps > my app > Contacts shows Private Access without any option to close it. Is there any way to close it and undisplay it ? I tried to uninstall and reinstall my app, but it didn't work.
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378
Apr ’25
WKWebView crash on iOS 26 Beta with -webkit-user-select: none
On iOS 26 Beta, WKWebView consistently crashes when interacting with pages that use -webkit-user-select: none. This issue does not reproduce in Safari, but only when the same content is loaded inside a WKWebView. Steps to Reproduce: Install iOS 26 Beta. Open a WKWebView that loads a webpage with the following style applied globally: -webkit-user-select: none; Perform the following gesture sequence inside the WKWebView: Double tap anywhere in the web content. On the second tap, keep your finger pressed (do not lift). While still holding the second tap, drag your finger across the screen (pan). This sequence reliably produces the crash. Expected Result: No crash. The gesture should either be ignored or handled gracefully. Actual Result: The app crashes 100% of the time with the following exception: #0 0x000000013f1a0874 in __pthread_kill () #1 0x00000001357522ec in pthread_kill () #2 0x00000001801ad950 in abort () #3 0x00000001802fa26c in __abort_message () #4 0x00000001802ea1a4 in demangling_terminate_handler () #5 0x0000000180077218 in _objc_terminate () #6 0x00000001802f9758 in std::__terminate () #7 0x00000001802fc7c0 in __cxxabiv1::failed_throw () #8 0x00000001802fc7a0 in __cxa_throw () #9 0x000000018009c1bc in objc_exception_throw () #10 0x00000001804f38f8 in +[NSException raise:format:] () #11 0x000000018c5fb570 in -[CALayer setPosition:] () #12 0x0000000185d02414 in -[UIView _backing_setPosition:] () #13 0x00000001867ec978 in -[UIView setCenter:] () #14 0x0000000186666468 in -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] () #15 0x0000000186666088 in __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke () #16 0x00000001867b3ed4 in -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] () #17 0x0000000186665fb0 in -[_UIEditMenuContentPresentation _displayMenu:reason:] () #18 0x0000000186665de4 in -[_UIEditMenuContentPresentation displayMenu:configuration:] () #19 0x00000001867b3260 in __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke () #20 0x00000001867b4c98 in __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke () #21 0x000000018653ff80 in __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke () #22 0x0000000186540448 in __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke () #23 0x000000018dba84f8 in WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call () #24 0x000000018dca14cc in WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call () #25 0x000000018e2d5c54 in IPC::Connection::dispatchMessage () #26 0x000000018e2d6118 in IPC::Connection::dispatchIncomingMessages () #27 0x00000001997f9c58 in WTF::RunLoop::performWork () #28 0x00000001997fa930 in WTF::RunLoop::performWork () #29 0x000000018044d4dc in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ () #30 0x000000018044d424 in __CFRunLoopDoSource0 () #31 0x000000018044cc0c in __CFRunLoopDoSources0 () #32 0x000000018044bd84 in __CFRunLoopRun () #33 0x0000000180446e24 in _CFRunLoopRunSpecificWithOptions () #34 0x00000001924c19bc in GSEventRunModal () #35 0x00000001862217a8 in -[UIApplication _run] () #36 0x00000001862259d0 in UIApplicationMain () Same issues below. https://developer.apple.com/forums/thread/796799 https://developer.apple.com/forums/thread/796501 https://developer.apple.com/forums/thread/796874 https://developer.apple.com/forums/thread/796686
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1.2k
Aug ’25
Question about testing the Declared Age Range feature
I’m integrating the Declared Age Range feature to tailor our app’s experience based on a user’s age range. I’m currently in the testing phase and would like to repeatedly test the consent flow and different outcomes from AgeRangeService.shared.requestAgeRange(...). However, once I go through the consent flow and choose to share, the age-range sharing sheet no longer appears on subsequent attempts—so it’s hard to validate edge cases (e.g., changed gates, declined flow, re-prompt behavior). Could you advise on the recommended way to reset or re-prompt during development? In particular: Is there a supported way to clear per-app consent so the system prompts again? Under what conditions should the “Share Age Range Again” control appear in Settings, and is there an equivalent way to trigger it for testing? Are there best practices for QA (e.g., using Ask First at the system level, testing on real devices vs. Simulator, using a separate bundle ID for dev builds, or other steps)? Any other guidance for validating different requestAgeRange results (e.g., declined/not available) would be appreciated.
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457
Nov ’25
iOS 26 RC: Scope button in stacked UISearchBar block touches
This is really odd. If you setup a UISearchController with a preferredSearchBarPlacement of .stacked and you setup the search bar with scope buttons, then when the view controller is initially displayed, the currently hidden scope buttons block touch events from reaching the main view just below the search bar. But once the search is activated and dismissed, then the freshly hidden scope buttons no longer cause an issue. This is easily demonstrated by putting a UITableViewController in a UINavigationController. Setup the table view to show a few simple rows. Then setup a search controller using the following code: func setupSearch() { // Setup a stacked search bar with scope buttons // Before the search is ever activated, the hidden scope buttons block any touches in the main view controller // in the area just below the search bar. // Once the search is activated and dismissed, the problem goes away. It seems that displaying and hiding the // scope buttons at least once fixes the issue that exists beforehand. // This issue only exists in iOS/iPadOS 26, not iOS/iPadOS 18 or earlier. let search = UISearchController(searchResultsController: UIViewController()) search.hidesNavigationBarDuringPresentation = true search.obscuresBackgroundDuringPresentation = true search.scopeBarActivation = .onSearchActivation // Ensure button appear immediately let searchBar = search.searchBar searchBar.scopeButtonTitles = [ "One", "Two", "Three" ] self.navigationItem.searchController = search self.navigationItem.hidesSearchBarWhenScrolling = false // Issue appears even if this is true self.navigationItem.preferredSearchBarPlacement = .stacked } When first shown, before any attempt is made to activate the search, any attempt to tap on the upper 2/3 of the first row in the table view (which is just below the search bar) fails. If you tap on the lower 1/3 of the first row it works fine. If you then activate the search (now the scope buttons appear) and then dismiss the search (now the scope buttons are hidden again), then there is no issue tapping anywhere on the first row of the table. But if you restart the app, the problem starts over again. This problem happens on any iPhone or iPad, real or simulated, running iOS/iPadOS 26 RC. This is a regression from iOS 18 or earlier.
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528
Nov ’25
iOS 26 UIBarButtonItems in navigation bar flashing wrong background during push/pop
An iOS app has a UINavigationController with a UINavigationBar that is non-translucent (e.g. black). When performing a push (or pop) to navigate to or from another UIViewController the UIBarButtonItems on the navigation bar are flashing a white background. With a dark navigation bar this is very noticeable and not desirable. This only occurs when run on iOS 26 and is related to Liquid Glass I've created FB19660024 with a minimal Xcode workspace to reproduce, along with a video showing the behavior. This is a cosmetic bug, not affecting functionality, but is a very undesirable effect on apps with dark and non-translucent navigation bars. Has anyone else seen this and found a workaround?
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507
Aug ’25
Components with Earcon haptic feedback for VoiceOver users
I want to understand which component types are intended to have an associated hint text, haptic feedback, or earcon associated with it for VoiceOver screen reader users. Is there a list somewhere or a HIG guideline for which transition types should have a sound? Some transitions in Apple apps generally include different beep sounds, such as opening a new screen screen dimming when a VoiceOver user swipes from the header / navbar to the body a scraping sound when swiping up or down a page. the beginning or end of the body section in Calculator when swiping from one row to the next. opening a pop up menu I would also appreciate any direction on what code strings are associated with these sounds and how custom components can capture these sounds or haptics or hints where it is expected? On the other hand, I don't want to get that info and then dictate that every component needs a specific beep type since these sounds appear to be used for specific purposes.
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861
May ’25
Navigation broken in iOS 18.4
All of a sudden, after iOS 18.4 was released, I am having tons of navigation problems in my app in production. Buttons navigating to empty pages, views seeming to 'freeze', top navigation bar mismatched with the content of the page. It seems that iOS 18.4 broke a critical piece of UIKit + SwiftUI bridging functionality that my project relies on. ** Originally posted in 'Core OS' topic but realized 'UI Frameworks > General' made more sense. My bad. ** My application is written with both UIKit and SwiftUI components. Here is a breakdown of my setup: UIApplicationDelegate > UIWindow > rootViewController of window is a UITabBarController > each tab is a UINavigationController rootViewController of nav controller is a UIHostingController > rootView of the hosting controller is a SwiftUI View In my SwiftUI views, I have been using NavigationLink for horizontal 'push' style navigation in my SwiftUI views. I do not use NavigationView, I only rely on the bridging capabilities of UINavigationController to action on my NavigationLinks. This has never been an issue, until iOS 18.4 was released. Now, when running iOS 18.4, I am having all sorts of unexpected behavior in the UI. I will break down 2 of these use cases here: Use case A: In one of my SwiftUI views, I have a ForEach for which each element's view is a NavigationLink. This is using the NavigationLink(_ destination:,label:) initializer. Navigating forward from here works/looks normal. However, once I try to navigate backward from that destination (tap the 'Back' button in top left), the view goes blank and the navigation bar at the top of the page (which is maintained by the UINavigationController instance) does not change. If I call popToRootViewController on that nav controller, the navigation bar at the top of the page returns to its normal state, but the view is still blank. It is not until after I have called popToRootViewController, and then navigate to a different tab of the UITabBarController and return to the initial tab, does the SwiftuI content view (the one with the ForEach) finally redraw and the view hierarchy is restored. Here is a warning that is logged in the console when I tap the 'Back ' button: Top view controller's view unexpectedly not in window for navigation transition. Skipping layout. nav = <UINavigationController: 0x1110bbe00>, topVC = <TtGC7SwiftUI19UIHostingControllerV5MyApp10MyPage: 0x106814e00> EDIT: If I replace the NavigationLink with a call to UINavigationController.pushViewController, I am still seeing the exact same behavior. Pressing back button makes the view empty > need to pop to root view controller and switch tabs in order to restore the view. Use case B Another instance of this issue happens whenever I try to use a NavigationLink inside of a view that itself was the destination of a NavigationLink in its parent view (i.e.: Root view > detail view > sub-detail view). For example, take the detail view destination in use case A. I have tapped a NavigationLink from the ForEach and landed on the detail view. Again, so far things work/look normal. Now, if I tap on another NavigationLink from that detail view, the view does not transition to the new page. The top navigation bar does transition, and shows the title and actions associated with this second destination. However, the view of this second destination is not displayed. It is worth noting that the same warning I mentioned above is also logged when I tap the NavigationLink to navigate to this second destination. Top view controller's view unexpectedly not in window for navigation transition. Skipping layout. nav = <UINavigationController: 0x109859400>, topVC = <TtGC7SwiftUI19UIHostingControllerVVS_19BridgedPresentation8RootView: 0x300ab8000> Strangely, if I switch to a different tab of the UITabBarController and back to the initial tab, this second destination's view is successfully rendered. It seems that switching tabs in this UITabBarController is calling something in either SwiftUI or UIKit that is redrawing my views. Conclusion This is a serious issue with UIKit + SwiftUI bridging support. I have never had problems like this until devices started running iOS 18.4, and there is nothing in the iOS 18.4 changelog that suggests this was an intentional change. All of a sudden, after updating to the latest iOS version, my app is totally broken. I want to be clear that I'm not using deprecated NavigationLink methods in these instances. My app's minimum deployment target is iOS 16. I know that there are more modern navigation APIs like navigation stack, etc. I am looking for answers about my use case: whether it is officially unsupported as of iOS 18.4, whether this setup should be supported and this is indeed some sort of bug in iOS, or anything in-between. I'm happy to provide formatted code if needed for discussion purposes. This is about my entire app's view hierarchy so there are a lot of disparate lines of code that make up this problem.
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632
May ’25
How to achieve a pure backdrop blur effect without predefined tint color in SwiftUI / UIKit?
Hi everyone, I’m currently trying to create a pure backdrop blur effect in my iOS app (SwiftUI / UIKit), similar to the backdrop-filter: blur(20px) effect in CSS. My goal is simple: • Apply a Gaussian blur (radius ~20px) to the background content • Overlay a semi-transparent black layer (opacity 0.3) • Avoid any predefined color tint from UIBlurEffect or .ultraThinMaterial, etc. However, every method I’ve tried so far (e.g., .ultraThinMaterial, UIBlurEffect(style:)) always introduces a built-in tint, which makes the result look gray or washed out. Even when layering a black color with opacity 0.3 over .ultraThinMaterial, it doesn’t give the clean, transparent-black + blur look I want. What I’m looking for: • A clean 20px blur effect (like CIGaussianBlur) • No color shift/tint added by default • A layer of black at 30% opacity on top of the blur • Ideally works live (not a static snapshot blur) Has anyone achieved something like this in UIKit or SwiftUI? Would really appreciate any insights, workarounds, or libraries that can help. Thanks in advance! Ben
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203
Jun ’25
iOS 26: iPhone will not power on stuck on battery screen
I set iOS 26 to install overnight, put my iPhone 16 Pro on the MagSafe charger, watched it charge just fine, and went to sleep. When I woke up the iPhone showed the “plug into power” dead battery screen. I took it off MagSafe and put it back on. A half hour later the phone was warm but still wouldn’t power on, just showed the battery screen with a little red in it. I took it off MagSafe and plugged it into my iPad charging brick with USB cable to give it more power, still it did not turn on. I tried holding all the buttons to try to force a restart but didn’t work. For anyone else encountering this, do this to enter DFU mode and restore it. I had to do it a few times before I got the timing right. Plug into your Mac and open Finder (or apparently a PC with Apple Devices or iTunes) Press and quickly release volume up Press and quickly release volume down Press and hold right side button When the battery disappears and screen goes black, hold volume down and continue holding side button After a couple seconds release the side button and continue holding volume down A prompt to allow connecting to the iPhone should appear after a couple seconds, click Allow, and it’ll say the iPhone entered DFU mode - proceed to restore the firmware
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461
Jun ’25
How to pass URL to iOS app from share sheet, and automatically open app?
Hello everyone, I’ve been trying to pass a URL from Safari (or any other app) into my own app via iOS extensions (similar to how if you go to a website, open the share sheet, and hit the ChatGPT app icon, it opens ChatGPT and pastes the website URL into the chat textbox), and I’m hitting a wall. I’ve attempted both a Share Extension (using SLComposeServiceViewController) and a UI-less Action Extension (using extensionContext?.open(...)), but in both scenarios, my main app never opens. Here’s a summary of my setup: Main App Target plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleURLTypes</key> <array> <dict> <key>CFBundleTypeRole</key> <string>Editor</string> <key>CFBundleURLName</key> <string>com.elislothower.URLDisplayApp</string> <key>CFBundleURLSchemes</key> <array> <string>myapp</string> </array> </dict> </array> <key>LSApplicationQueriesSchemes</key> <array/> </dict> </plist> This means my custom URL scheme is myapp://. My app delegate (or SwiftUI’s .onOpenURL) correctly handles myapp://share?url=... if I open it directly from Safari. Share Extension Attempt Subclassed SLComposeServiceViewController. Plist had com.apple.share-services as the NSExtensionPointIdentifier. I called extensionContext?.open(deepLink) with myapp://share?url=..., but it always returned false. Also, the UI (with Cancel/Post buttons) was overkill for my needs. UI-less Action Extension Attempt Created a no-UI action extension with com.apple.ui-services as NSExtensionPointIdentifier. In my custom ActionViewController, I formed the same myapp://share?url=... deep link and called extensionContext?.open(deepLink). The extension does appear in the share sheet, but again, open(deepLink) returns false—my main app never opens. Confirmed Setup I’ve tested the URL scheme in Safari: typing myapp://share?url=... directly prompts to open my app, and the URL is handled fine there. I’ve ensured both extension Info.plists have <key>LSApplicationQueriesSchemes</key><array><string>myapp</string></array> so they can attempt to open that scheme. Tried on both simulator and physical device. On the physical device, the main app is definitely installed and has been launched at least once. Current Behavior The extension logs that it forms the deep link (myapp://share?url=...) correctly. extensionContext?.open(deepLink) fails (success == false), so the main app never opens. I’ve also tried forcing the call on the main thread, simplifying the URL (like myapp://test), and checking for any typos or case-sensitivity issues—still no luck. Is there a known iOS restriction or trick for allowing an extension (share or action) to open its containing app directly? Have I missed a configuration step or entitlement that’s necessary? Is it possible that iOS is just rejecting the call in these contexts? I’d love any insight or suggestions from those who have successfully launched their main app from an extension. Thank you in advance! ContentView.swift Info.plist URLDisplayAppApp.swift URLDisplayApp.entitlements ActionRequestHandler.swift ActionViewController.swift Info.plist MyAppActionExtension.entitlements
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598
Jun ’25
SIGTRAP crash in CoreGraphics font rendering pipeline (iOS 18.4)
We're observing new crashes specifically on iOS 18.4 devices with this pattern: Exception Type: SIGTRAP Exception Codes: fault addr: 0x000000019bc0f088 Crashed Thread: 0 Thread 0 0 libsystem_malloc.dylib _xzm_xzone_malloc_from_tiny_chunk.cold.1 + 36 1 libsystem_malloc.dylib __xzm_xzone_malloc_from_tiny_chunk + 612 2 libsystem_malloc.dylib __xzm_xzone_find_and_malloc_from_tiny_chunk + 112 3 libsystem_malloc.dylib __xzm_xzone_malloc_tiny_outlined + 312 4 CoreGraphics CG::Path::Path(CG::Path const&) + 132 5 CoreGraphics _CGPathCreateMutableCopyByTransformingPath + 112 6 CoreGraphics _CGFontCreateGlyphPath + 144 7 CoreGraphics _CGGlyphBuilderLockBitmaps + 1112 8 CoreGraphics _render_glyphs + 292 9 CoreGraphics _draw_glyph_bitmaps + 1116 10 CoreGraphics _ripc_DrawGlyphs + 1464 11 CoreGraphics CG::DisplayList::executeEntries(std::__1::__wrap_iter<std::__1::shared_ptr<CG::DisplayListEntry const>*>, std::__1::__wrap_iter<std::__1::shared_ptr<CG::DisplayListEntry const>*>, CGContextDelegate*, CGRenderingState*, CGGStack*, CGRect const*, __CFDictionary const*, bool) + 1328 12 CoreGraphics _CGDisplayListDrawInContextDelegate + 340 13 QuartzCore _CABackingStoreUpdate_ + 612 14 QuartzCore ____ZN2CA5Layer8display_Ev_block_invoke + 120 15 QuartzCore -[CALayer _display] + 1512 16 QuartzCore CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 420 17 QuartzCore CA::Context::commit_transaction(CA::Transaction*, double, double*) + 476 18 QuartzCore CA::Transaction::commit() + 644 19 UIKitCore ___34-[UIApplication _firstCommitBlock]_block_invoke_2 + 36 20 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 28 21 CoreFoundation ___CFRunLoopDoBlocks + 352 22 CoreFoundation ___CFRunLoopRun + 868 23 CoreFoundation _CFRunLoopRunSpecific + 572 24 GraphicsServices _GSEventRunModal + 168 25 UIKitCore -[UIApplication _run] + 816 26 UIKitCore _UIApplicationMain + 336 27 app _main + 132 28 dyld __dyld_process_info_create + 33284 Key Observations: Crash occurs during font glyph path creation (CGFontCreateGlyphPath) Involves memory allocation in malloc's xzone implementation 100% reproducible on iOS 18.4, not seen in prior OS versions Occurs during standard CALayer rendering operations Not tied to any specific font family or glyph content Questions for Apple: Is this crash signature recognized as a known issue in iOS 18.4's CoreGraphics? Could changes to xzone memory management in iOS 18.4 interact poorly with font rendering? Are there specific conditions that might trigger SIGTRAP in CGPathCreateMutableCopyByTransformingPath? Any recommended mitigations for text rendering while awaiting system updates?
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696
May ’25
How to Handle Asynchronous Operations in BGContinuedProcessingTask
I would like to know whether BGContinuedProcessingTaskRequest supports executing asynchronous tasks internally, or if it can only execute synchronous tasks within BGContinuedProcessingTaskRequest? Our project is very complex, and we now need to use BGContinuedProcessingTaskRequest to perform some long-running operations when the app enters the background (such as video encoding/decoding & export). However, our export interface is an asynchronous function, for example video.export(callback: FinishCallback). This export call returns immediately, and when the export completes internally, it calls back through the passed-in callback. So when I call BGTaskScheduler.shared.register to register a BGContinuedProcessingTask, what should be the correct approach? Should I directly call video.export(nil) without any waiting, or should I wait for the export function to complete in the callback? For example: BGTaskScheduler.shared.register(forTaskWithIdentifier: "com.xxx.xxx.xxx.xxx", using: nil) { task in guard let continuedTask = task as? BGContinuedProcessingTask else { task.setTaskCompleted(success: false) return } let scanner = SmartAssetsManager.shared let semaphore = DispatchSemaphore(value: 0) continuedTask.expirationHandler = { logError(items: "xwxdebug finished.") semaphore.signal() } logInfo(items: "xwxdebug start!") video.export { _ in semaphore.signal() } semaphore.wait() logError(items: "xwxdebug finished!") }
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169
Nov ’25
Large title is not visible in iOS 26
I am using below code to change navigationBar bg colour, but the text is hidden in large title. It works fine in previous versions. Kindly refer below code and attached images. Code: override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) navigationController?.navigationBar.prefersLargeTitles = true navigationItem.largeTitleDisplayMode = .always let appearance = UINavigationBarAppearance() appearance.backgroundColor = UIColor( red: 0.101961, green: 0.439216, blue: 0.388235, alpha: 1.0 ) navigationController?.navigationBar.standardAppearance = appearance navigationController?.navigationBar.scrollEdgeAppearance = appearance navigationController?.navigationBar.compactAppearance = appearance } Referenced images:
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497
Aug ’25
Critical iOS Activation Vulnerability
There’s a critical, actively exploited vulnerability in Apple’s iOS activation servers allowing unauthenticated XML payload injection: https://cyberpress.org/apple-ios-activation-vulnerability/ This flaw targets the core activation process, bypassing normal security checks. Despite the severity, it’s barely discussed in public security channels. Why is this not being addressed or publicly acknowledged? Apple developers and security researchers should urgently review and audit activation flows—this is a direct attack vector on device trust integrity. Any insights or official response appreciated.
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235
Jun ’25
Problem NumberFormatter with Locale
We have identified an issue when using NumberFormatter with the locale set to it_IT. Specifically, when formatting numbers with exactly four integer digits, the grouping separator is not applied: for example, the number is displayed as 4000,00 instead of the expected 4.000,00. This behavior occurs only with four-digit integers; for instance, 40.000,00 is formatted correctly. The issue appears to affect only iOS 18.4 and later versions.
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226
Apr ’25
AVCaptureSession video and audio out of sync
I'm using an AVCaptureSession to send video and audio samples to an AVAssetWriter. When I play back the resultant video, sometimes there is a significant lag between the audio compared with the video, so they're just not in sync. But sometimes they are, with the same code. If I look at the very first presentation time stamps of the buffers being sent to the delegate, via func captureOutput(_: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) I see something like this: Adding audio samples for pts time 227711.0855328798, Adding video samples for pts time 227710.778785374 That is, the clock for audio vs video is behind: the first audio sample I receive is at 11.08 something, while the video video sample is earlier in time, at 10.778 something. The times are the presentation time stamps of the buffer, and the outputPresentationTimeStamp is the exact same number. It feels like "video" vs the "audio" clock are just mismatched. This doesn't always happen: sometimes they're synced. Sometimes they're not. Any ideas? The device I'm recording is a webcam, on iPadOS, connected via the usb-c port.
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210
Apr ’25
iOS 26 Developer Beta Issues
Hi, I’ve recently installed the iOS 26 DB, and I’m experiencing heating issues on my iPhone. Is there a fix to this? Also, is it a bug or a feature, that I can’t remove certain sections in the Photos app rather than rearranging them. Pls lemme know. Thanks.
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301
Jun ’25
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
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2.0k
Nov ’25
`accessibilityUserInputLabels` is ignored on `UIBarButtonItem`
accessibilityUserInputLabels is working fine with any view I tried this on. Meaning that the control can be toggled with the provided alternative names when using Voice Control. When setting this property on any UIBarButtonItem though, it seems Voice Control ignores the alternative names provided by setting accessibilityUserInputLabels. For comparison, accessibilityLabel works perfectly when set on UIBarButtonItem. Is anyone facing the same issue? Using Xcode 16.0 (16A242) on iOS 18
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3
Boosts
0
Views
673
Activity
Aug ’25
How to undisplay `Private Access` in `Contacts Access` when i use `CNContactPickerViewController`?
In iOS 18, i use CNContactPickerViewController to access to Contacts (i know it is one-time access). After first pick up one contact, the Setting > Apps > my app > Contacts shows Private Access without any option to close it. Is there any way to close it and undisplay it ? I tried to uninstall and reinstall my app, but it didn't work.
Replies
3
Boosts
0
Views
378
Activity
Apr ’25
WKWebView crash on iOS 26 Beta with -webkit-user-select: none
On iOS 26 Beta, WKWebView consistently crashes when interacting with pages that use -webkit-user-select: none. This issue does not reproduce in Safari, but only when the same content is loaded inside a WKWebView. Steps to Reproduce: Install iOS 26 Beta. Open a WKWebView that loads a webpage with the following style applied globally: -webkit-user-select: none; Perform the following gesture sequence inside the WKWebView: Double tap anywhere in the web content. On the second tap, keep your finger pressed (do not lift). While still holding the second tap, drag your finger across the screen (pan). This sequence reliably produces the crash. Expected Result: No crash. The gesture should either be ignored or handled gracefully. Actual Result: The app crashes 100% of the time with the following exception: #0 0x000000013f1a0874 in __pthread_kill () #1 0x00000001357522ec in pthread_kill () #2 0x00000001801ad950 in abort () #3 0x00000001802fa26c in __abort_message () #4 0x00000001802ea1a4 in demangling_terminate_handler () #5 0x0000000180077218 in _objc_terminate () #6 0x00000001802f9758 in std::__terminate () #7 0x00000001802fc7c0 in __cxxabiv1::failed_throw () #8 0x00000001802fc7a0 in __cxa_throw () #9 0x000000018009c1bc in objc_exception_throw () #10 0x00000001804f38f8 in +[NSException raise:format:] () #11 0x000000018c5fb570 in -[CALayer setPosition:] () #12 0x0000000185d02414 in -[UIView _backing_setPosition:] () #13 0x00000001867ec978 in -[UIView setCenter:] () #14 0x0000000186666468 in -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] () #15 0x0000000186666088 in __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke () #16 0x00000001867b3ed4 in -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] () #17 0x0000000186665fb0 in -[_UIEditMenuContentPresentation _displayMenu:reason:] () #18 0x0000000186665de4 in -[_UIEditMenuContentPresentation displayMenu:configuration:] () #19 0x00000001867b3260 in __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke () #20 0x00000001867b4c98 in __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke () #21 0x000000018653ff80 in __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke () #22 0x0000000186540448 in __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke () #23 0x000000018dba84f8 in WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call () #24 0x000000018dca14cc in WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call () #25 0x000000018e2d5c54 in IPC::Connection::dispatchMessage () #26 0x000000018e2d6118 in IPC::Connection::dispatchIncomingMessages () #27 0x00000001997f9c58 in WTF::RunLoop::performWork () #28 0x00000001997fa930 in WTF::RunLoop::performWork () #29 0x000000018044d4dc in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ () #30 0x000000018044d424 in __CFRunLoopDoSource0 () #31 0x000000018044cc0c in __CFRunLoopDoSources0 () #32 0x000000018044bd84 in __CFRunLoopRun () #33 0x0000000180446e24 in _CFRunLoopRunSpecificWithOptions () #34 0x00000001924c19bc in GSEventRunModal () #35 0x00000001862217a8 in -[UIApplication _run] () #36 0x00000001862259d0 in UIApplicationMain () Same issues below. https://developer.apple.com/forums/thread/796799 https://developer.apple.com/forums/thread/796501 https://developer.apple.com/forums/thread/796874 https://developer.apple.com/forums/thread/796686
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4
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1.2k
Activity
Aug ’25
Question about testing the Declared Age Range feature
I’m integrating the Declared Age Range feature to tailor our app’s experience based on a user’s age range. I’m currently in the testing phase and would like to repeatedly test the consent flow and different outcomes from AgeRangeService.shared.requestAgeRange(...). However, once I go through the consent flow and choose to share, the age-range sharing sheet no longer appears on subsequent attempts—so it’s hard to validate edge cases (e.g., changed gates, declined flow, re-prompt behavior). Could you advise on the recommended way to reset or re-prompt during development? In particular: Is there a supported way to clear per-app consent so the system prompts again? Under what conditions should the “Share Age Range Again” control appear in Settings, and is there an equivalent way to trigger it for testing? Are there best practices for QA (e.g., using Ask First at the system level, testing on real devices vs. Simulator, using a separate bundle ID for dev builds, or other steps)? Any other guidance for validating different requestAgeRange results (e.g., declined/not available) would be appreciated.
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1
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457
Activity
Nov ’25
iOS 26 RC: Scope button in stacked UISearchBar block touches
This is really odd. If you setup a UISearchController with a preferredSearchBarPlacement of .stacked and you setup the search bar with scope buttons, then when the view controller is initially displayed, the currently hidden scope buttons block touch events from reaching the main view just below the search bar. But once the search is activated and dismissed, then the freshly hidden scope buttons no longer cause an issue. This is easily demonstrated by putting a UITableViewController in a UINavigationController. Setup the table view to show a few simple rows. Then setup a search controller using the following code: func setupSearch() { // Setup a stacked search bar with scope buttons // Before the search is ever activated, the hidden scope buttons block any touches in the main view controller // in the area just below the search bar. // Once the search is activated and dismissed, the problem goes away. It seems that displaying and hiding the // scope buttons at least once fixes the issue that exists beforehand. // This issue only exists in iOS/iPadOS 26, not iOS/iPadOS 18 or earlier. let search = UISearchController(searchResultsController: UIViewController()) search.hidesNavigationBarDuringPresentation = true search.obscuresBackgroundDuringPresentation = true search.scopeBarActivation = .onSearchActivation // Ensure button appear immediately let searchBar = search.searchBar searchBar.scopeButtonTitles = [ "One", "Two", "Three" ] self.navigationItem.searchController = search self.navigationItem.hidesSearchBarWhenScrolling = false // Issue appears even if this is true self.navigationItem.preferredSearchBarPlacement = .stacked } When first shown, before any attempt is made to activate the search, any attempt to tap on the upper 2/3 of the first row in the table view (which is just below the search bar) fails. If you tap on the lower 1/3 of the first row it works fine. If you then activate the search (now the scope buttons appear) and then dismiss the search (now the scope buttons are hidden again), then there is no issue tapping anywhere on the first row of the table. But if you restart the app, the problem starts over again. This problem happens on any iPhone or iPad, real or simulated, running iOS/iPadOS 26 RC. This is a regression from iOS 18 or earlier.
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528
Activity
Nov ’25
iOS 26 UIBarButtonItems in navigation bar flashing wrong background during push/pop
An iOS app has a UINavigationController with a UINavigationBar that is non-translucent (e.g. black). When performing a push (or pop) to navigate to or from another UIViewController the UIBarButtonItems on the navigation bar are flashing a white background. With a dark navigation bar this is very noticeable and not desirable. This only occurs when run on iOS 26 and is related to Liquid Glass I've created FB19660024 with a minimal Xcode workspace to reproduce, along with a video showing the behavior. This is a cosmetic bug, not affecting functionality, but is a very undesirable effect on apps with dark and non-translucent navigation bars. Has anyone else seen this and found a workaround?
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2
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507
Activity
Aug ’25
Components with Earcon haptic feedback for VoiceOver users
I want to understand which component types are intended to have an associated hint text, haptic feedback, or earcon associated with it for VoiceOver screen reader users. Is there a list somewhere or a HIG guideline for which transition types should have a sound? Some transitions in Apple apps generally include different beep sounds, such as opening a new screen screen dimming when a VoiceOver user swipes from the header / navbar to the body a scraping sound when swiping up or down a page. the beginning or end of the body section in Calculator when swiping from one row to the next. opening a pop up menu I would also appreciate any direction on what code strings are associated with these sounds and how custom components can capture these sounds or haptics or hints where it is expected? On the other hand, I don't want to get that info and then dictate that every component needs a specific beep type since these sounds appear to be used for specific purposes.
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3
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1
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861
Activity
May ’25
Navigation broken in iOS 18.4
All of a sudden, after iOS 18.4 was released, I am having tons of navigation problems in my app in production. Buttons navigating to empty pages, views seeming to 'freeze', top navigation bar mismatched with the content of the page. It seems that iOS 18.4 broke a critical piece of UIKit + SwiftUI bridging functionality that my project relies on. ** Originally posted in 'Core OS' topic but realized 'UI Frameworks > General' made more sense. My bad. ** My application is written with both UIKit and SwiftUI components. Here is a breakdown of my setup: UIApplicationDelegate > UIWindow > rootViewController of window is a UITabBarController > each tab is a UINavigationController rootViewController of nav controller is a UIHostingController > rootView of the hosting controller is a SwiftUI View In my SwiftUI views, I have been using NavigationLink for horizontal 'push' style navigation in my SwiftUI views. I do not use NavigationView, I only rely on the bridging capabilities of UINavigationController to action on my NavigationLinks. This has never been an issue, until iOS 18.4 was released. Now, when running iOS 18.4, I am having all sorts of unexpected behavior in the UI. I will break down 2 of these use cases here: Use case A: In one of my SwiftUI views, I have a ForEach for which each element's view is a NavigationLink. This is using the NavigationLink(_ destination:,label:) initializer. Navigating forward from here works/looks normal. However, once I try to navigate backward from that destination (tap the 'Back' button in top left), the view goes blank and the navigation bar at the top of the page (which is maintained by the UINavigationController instance) does not change. If I call popToRootViewController on that nav controller, the navigation bar at the top of the page returns to its normal state, but the view is still blank. It is not until after I have called popToRootViewController, and then navigate to a different tab of the UITabBarController and return to the initial tab, does the SwiftuI content view (the one with the ForEach) finally redraw and the view hierarchy is restored. Here is a warning that is logged in the console when I tap the 'Back ' button: Top view controller's view unexpectedly not in window for navigation transition. Skipping layout. nav = <UINavigationController: 0x1110bbe00>, topVC = <TtGC7SwiftUI19UIHostingControllerV5MyApp10MyPage: 0x106814e00> EDIT: If I replace the NavigationLink with a call to UINavigationController.pushViewController, I am still seeing the exact same behavior. Pressing back button makes the view empty > need to pop to root view controller and switch tabs in order to restore the view. Use case B Another instance of this issue happens whenever I try to use a NavigationLink inside of a view that itself was the destination of a NavigationLink in its parent view (i.e.: Root view > detail view > sub-detail view). For example, take the detail view destination in use case A. I have tapped a NavigationLink from the ForEach and landed on the detail view. Again, so far things work/look normal. Now, if I tap on another NavigationLink from that detail view, the view does not transition to the new page. The top navigation bar does transition, and shows the title and actions associated with this second destination. However, the view of this second destination is not displayed. It is worth noting that the same warning I mentioned above is also logged when I tap the NavigationLink to navigate to this second destination. Top view controller's view unexpectedly not in window for navigation transition. Skipping layout. nav = <UINavigationController: 0x109859400>, topVC = <TtGC7SwiftUI19UIHostingControllerVVS_19BridgedPresentation8RootView: 0x300ab8000> Strangely, if I switch to a different tab of the UITabBarController and back to the initial tab, this second destination's view is successfully rendered. It seems that switching tabs in this UITabBarController is calling something in either SwiftUI or UIKit that is redrawing my views. Conclusion This is a serious issue with UIKit + SwiftUI bridging support. I have never had problems like this until devices started running iOS 18.4, and there is nothing in the iOS 18.4 changelog that suggests this was an intentional change. All of a sudden, after updating to the latest iOS version, my app is totally broken. I want to be clear that I'm not using deprecated NavigationLink methods in these instances. My app's minimum deployment target is iOS 16. I know that there are more modern navigation APIs like navigation stack, etc. I am looking for answers about my use case: whether it is officially unsupported as of iOS 18.4, whether this setup should be supported and this is indeed some sort of bug in iOS, or anything in-between. I'm happy to provide formatted code if needed for discussion purposes. This is about my entire app's view hierarchy so there are a lot of disparate lines of code that make up this problem.
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7
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632
Activity
May ’25
What iPhone and iPad models under iOS 26 support SpeechTranscriber
For what iPhone and iPad models under iOS 26 SpeechTranscriber.isAvailable is true
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544
Activity
Nov ’25
How to achieve a pure backdrop blur effect without predefined tint color in SwiftUI / UIKit?
Hi everyone, I’m currently trying to create a pure backdrop blur effect in my iOS app (SwiftUI / UIKit), similar to the backdrop-filter: blur(20px) effect in CSS. My goal is simple: • Apply a Gaussian blur (radius ~20px) to the background content • Overlay a semi-transparent black layer (opacity 0.3) • Avoid any predefined color tint from UIBlurEffect or .ultraThinMaterial, etc. However, every method I’ve tried so far (e.g., .ultraThinMaterial, UIBlurEffect(style:)) always introduces a built-in tint, which makes the result look gray or washed out. Even when layering a black color with opacity 0.3 over .ultraThinMaterial, it doesn’t give the clean, transparent-black + blur look I want. What I’m looking for: • A clean 20px blur effect (like CIGaussianBlur) • No color shift/tint added by default • A layer of black at 30% opacity on top of the blur • Ideally works live (not a static snapshot blur) Has anyone achieved something like this in UIKit or SwiftUI? Would really appreciate any insights, workarounds, or libraries that can help. Thanks in advance! Ben
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203
Activity
Jun ’25
iOS 26: iPhone will not power on stuck on battery screen
I set iOS 26 to install overnight, put my iPhone 16 Pro on the MagSafe charger, watched it charge just fine, and went to sleep. When I woke up the iPhone showed the “plug into power” dead battery screen. I took it off MagSafe and put it back on. A half hour later the phone was warm but still wouldn’t power on, just showed the battery screen with a little red in it. I took it off MagSafe and plugged it into my iPad charging brick with USB cable to give it more power, still it did not turn on. I tried holding all the buttons to try to force a restart but didn’t work. For anyone else encountering this, do this to enter DFU mode and restore it. I had to do it a few times before I got the timing right. Plug into your Mac and open Finder (or apparently a PC with Apple Devices or iTunes) Press and quickly release volume up Press and quickly release volume down Press and hold right side button When the battery disappears and screen goes black, hold volume down and continue holding side button After a couple seconds release the side button and continue holding volume down A prompt to allow connecting to the iPhone should appear after a couple seconds, click Allow, and it’ll say the iPhone entered DFU mode - proceed to restore the firmware
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461
Activity
Jun ’25
How to pass URL to iOS app from share sheet, and automatically open app?
Hello everyone, I’ve been trying to pass a URL from Safari (or any other app) into my own app via iOS extensions (similar to how if you go to a website, open the share sheet, and hit the ChatGPT app icon, it opens ChatGPT and pastes the website URL into the chat textbox), and I’m hitting a wall. I’ve attempted both a Share Extension (using SLComposeServiceViewController) and a UI-less Action Extension (using extensionContext?.open(...)), but in both scenarios, my main app never opens. Here’s a summary of my setup: Main App Target plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleURLTypes</key> <array> <dict> <key>CFBundleTypeRole</key> <string>Editor</string> <key>CFBundleURLName</key> <string>com.elislothower.URLDisplayApp</string> <key>CFBundleURLSchemes</key> <array> <string>myapp</string> </array> </dict> </array> <key>LSApplicationQueriesSchemes</key> <array/> </dict> </plist> This means my custom URL scheme is myapp://. My app delegate (or SwiftUI’s .onOpenURL) correctly handles myapp://share?url=... if I open it directly from Safari. Share Extension Attempt Subclassed SLComposeServiceViewController. Plist had com.apple.share-services as the NSExtensionPointIdentifier. I called extensionContext?.open(deepLink) with myapp://share?url=..., but it always returned false. Also, the UI (with Cancel/Post buttons) was overkill for my needs. UI-less Action Extension Attempt Created a no-UI action extension with com.apple.ui-services as NSExtensionPointIdentifier. In my custom ActionViewController, I formed the same myapp://share?url=... deep link and called extensionContext?.open(deepLink). The extension does appear in the share sheet, but again, open(deepLink) returns false—my main app never opens. Confirmed Setup I’ve tested the URL scheme in Safari: typing myapp://share?url=... directly prompts to open my app, and the URL is handled fine there. I’ve ensured both extension Info.plists have <key>LSApplicationQueriesSchemes</key><array><string>myapp</string></array> so they can attempt to open that scheme. Tried on both simulator and physical device. On the physical device, the main app is definitely installed and has been launched at least once. Current Behavior The extension logs that it forms the deep link (myapp://share?url=...) correctly. extensionContext?.open(deepLink) fails (success == false), so the main app never opens. I’ve also tried forcing the call on the main thread, simplifying the URL (like myapp://test), and checking for any typos or case-sensitivity issues—still no luck. Is there a known iOS restriction or trick for allowing an extension (share or action) to open its containing app directly? Have I missed a configuration step or entitlement that’s necessary? Is it possible that iOS is just rejecting the call in these contexts? I’d love any insight or suggestions from those who have successfully launched their main app from an extension. Thank you in advance! ContentView.swift Info.plist URLDisplayAppApp.swift URLDisplayApp.entitlements ActionRequestHandler.swift ActionViewController.swift Info.plist MyAppActionExtension.entitlements
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598
Activity
Jun ’25
SIGTRAP crash in CoreGraphics font rendering pipeline (iOS 18.4)
We're observing new crashes specifically on iOS 18.4 devices with this pattern: Exception Type: SIGTRAP Exception Codes: fault addr: 0x000000019bc0f088 Crashed Thread: 0 Thread 0 0 libsystem_malloc.dylib _xzm_xzone_malloc_from_tiny_chunk.cold.1 + 36 1 libsystem_malloc.dylib __xzm_xzone_malloc_from_tiny_chunk + 612 2 libsystem_malloc.dylib __xzm_xzone_find_and_malloc_from_tiny_chunk + 112 3 libsystem_malloc.dylib __xzm_xzone_malloc_tiny_outlined + 312 4 CoreGraphics CG::Path::Path(CG::Path const&) + 132 5 CoreGraphics _CGPathCreateMutableCopyByTransformingPath + 112 6 CoreGraphics _CGFontCreateGlyphPath + 144 7 CoreGraphics _CGGlyphBuilderLockBitmaps + 1112 8 CoreGraphics _render_glyphs + 292 9 CoreGraphics _draw_glyph_bitmaps + 1116 10 CoreGraphics _ripc_DrawGlyphs + 1464 11 CoreGraphics CG::DisplayList::executeEntries(std::__1::__wrap_iter<std::__1::shared_ptr<CG::DisplayListEntry const>*>, std::__1::__wrap_iter<std::__1::shared_ptr<CG::DisplayListEntry const>*>, CGContextDelegate*, CGRenderingState*, CGGStack*, CGRect const*, __CFDictionary const*, bool) + 1328 12 CoreGraphics _CGDisplayListDrawInContextDelegate + 340 13 QuartzCore _CABackingStoreUpdate_ + 612 14 QuartzCore ____ZN2CA5Layer8display_Ev_block_invoke + 120 15 QuartzCore -[CALayer _display] + 1512 16 QuartzCore CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 420 17 QuartzCore CA::Context::commit_transaction(CA::Transaction*, double, double*) + 476 18 QuartzCore CA::Transaction::commit() + 644 19 UIKitCore ___34-[UIApplication _firstCommitBlock]_block_invoke_2 + 36 20 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 28 21 CoreFoundation ___CFRunLoopDoBlocks + 352 22 CoreFoundation ___CFRunLoopRun + 868 23 CoreFoundation _CFRunLoopRunSpecific + 572 24 GraphicsServices _GSEventRunModal + 168 25 UIKitCore -[UIApplication _run] + 816 26 UIKitCore _UIApplicationMain + 336 27 app _main + 132 28 dyld __dyld_process_info_create + 33284 Key Observations: Crash occurs during font glyph path creation (CGFontCreateGlyphPath) Involves memory allocation in malloc's xzone implementation 100% reproducible on iOS 18.4, not seen in prior OS versions Occurs during standard CALayer rendering operations Not tied to any specific font family or glyph content Questions for Apple: Is this crash signature recognized as a known issue in iOS 18.4's CoreGraphics? Could changes to xzone memory management in iOS 18.4 interact poorly with font rendering? Are there specific conditions that might trigger SIGTRAP in CGPathCreateMutableCopyByTransformingPath? Any recommended mitigations for text rendering while awaiting system updates?
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696
Activity
May ’25
How to Handle Asynchronous Operations in BGContinuedProcessingTask
I would like to know whether BGContinuedProcessingTaskRequest supports executing asynchronous tasks internally, or if it can only execute synchronous tasks within BGContinuedProcessingTaskRequest? Our project is very complex, and we now need to use BGContinuedProcessingTaskRequest to perform some long-running operations when the app enters the background (such as video encoding/decoding & export). However, our export interface is an asynchronous function, for example video.export(callback: FinishCallback). This export call returns immediately, and when the export completes internally, it calls back through the passed-in callback. So when I call BGTaskScheduler.shared.register to register a BGContinuedProcessingTask, what should be the correct approach? Should I directly call video.export(nil) without any waiting, or should I wait for the export function to complete in the callback? For example: BGTaskScheduler.shared.register(forTaskWithIdentifier: "com.xxx.xxx.xxx.xxx", using: nil) { task in guard let continuedTask = task as? BGContinuedProcessingTask else { task.setTaskCompleted(success: false) return } let scanner = SmartAssetsManager.shared let semaphore = DispatchSemaphore(value: 0) continuedTask.expirationHandler = { logError(items: "xwxdebug finished.") semaphore.signal() } logInfo(items: "xwxdebug start!") video.export { _ in semaphore.signal() } semaphore.wait() logError(items: "xwxdebug finished!") }
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169
Activity
Nov ’25
Large title is not visible in iOS 26
I am using below code to change navigationBar bg colour, but the text is hidden in large title. It works fine in previous versions. Kindly refer below code and attached images. Code: override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) navigationController?.navigationBar.prefersLargeTitles = true navigationItem.largeTitleDisplayMode = .always let appearance = UINavigationBarAppearance() appearance.backgroundColor = UIColor( red: 0.101961, green: 0.439216, blue: 0.388235, alpha: 1.0 ) navigationController?.navigationBar.standardAppearance = appearance navigationController?.navigationBar.scrollEdgeAppearance = appearance navigationController?.navigationBar.compactAppearance = appearance } Referenced images:
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497
Activity
Aug ’25
Critical iOS Activation Vulnerability
There’s a critical, actively exploited vulnerability in Apple’s iOS activation servers allowing unauthenticated XML payload injection: https://cyberpress.org/apple-ios-activation-vulnerability/ This flaw targets the core activation process, bypassing normal security checks. Despite the severity, it’s barely discussed in public security channels. Why is this not being addressed or publicly acknowledged? Apple developers and security researchers should urgently review and audit activation flows—this is a direct attack vector on device trust integrity. Any insights or official response appreciated.
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3
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1
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235
Activity
Jun ’25
Problem NumberFormatter with Locale
We have identified an issue when using NumberFormatter with the locale set to it_IT. Specifically, when formatting numbers with exactly four integer digits, the grouping separator is not applied: for example, the number is displayed as 4000,00 instead of the expected 4.000,00. This behavior occurs only with four-digit integers; for instance, 40.000,00 is formatted correctly. The issue appears to affect only iOS 18.4 and later versions.
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3
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226
Activity
Apr ’25
AVCaptureSession video and audio out of sync
I'm using an AVCaptureSession to send video and audio samples to an AVAssetWriter. When I play back the resultant video, sometimes there is a significant lag between the audio compared with the video, so they're just not in sync. But sometimes they are, with the same code. If I look at the very first presentation time stamps of the buffers being sent to the delegate, via func captureOutput(_: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) I see something like this: Adding audio samples for pts time 227711.0855328798, Adding video samples for pts time 227710.778785374 That is, the clock for audio vs video is behind: the first audio sample I receive is at 11.08 something, while the video video sample is earlier in time, at 10.778 something. The times are the presentation time stamps of the buffer, and the outputPresentationTimeStamp is the exact same number. It feels like "video" vs the "audio" clock are just mismatched. This doesn't always happen: sometimes they're synced. Sometimes they're not. Any ideas? The device I'm recording is a webcam, on iPadOS, connected via the usb-c port.
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210
Activity
Apr ’25
iOS 26 Developer Beta Issues
Hi, I’ve recently installed the iOS 26 DB, and I’m experiencing heating issues on my iPhone. Is there a fix to this? Also, is it a bug or a feature, that I can’t remove certain sections in the Photos app rather than rearranging them. Pls lemme know. Thanks.
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3
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301
Activity
Jun ’25
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
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2.0k
Activity
Nov ’25