I placed a PNG format image in the Assets folder and also added a HEIC format image that was converted from PNG. When the slicing is set to None, both images appear the same in the UIImageView. However, when I select "Horizontal and Vertical" for the Slices of both images, they no longer appear consistent, and the HEIC image displays abnormally. @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. [self addImageViews]; } - (void)addImageViews { UIImageView *heicImageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, [self imageViewSize].width,[self imageViewSize].height)]; UIImageView *pngImageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 300, [self imageViewSize].width,[self imageViewSize].height)]; heicImageView.image = [UIImage imageNamed:@"heic"]; pngImageView.image = [UIImage imageNamed:@"png"]; [self.view addSubview:heicImageView]; [self.view addSubview:pngImageView]; } - (CGSize)imageViewSize { return CGSizeMake(146, 44); } @end

I have a UITableView that displays a Group/Note hierarchy analogous to a Finder Folder/Files hierarchy. I have implemented Drag and Drop such that if I drag a Note to the Finder Desktop an HTML file is created of the Note, and if I drag a Group to the Finder Desktop a Text file is created of the Group's title. Here is the Helper Dragging extension that I've implemented: // // Model+Dragging.swift // /* Abstract: Helper methods for providing and consuming drag-and-drop data. */ import UIKit import MobileCoreServices // Conditionalize Drag and Drop so it is not in iOS target. #if targetEnvironment(macCatalyst) extension Model { /** A helper function that serves as an interface to the data model, called by the implementation of the `tableView(_ canHandle:)` method. */ func canHandle(_ session: UIDropSession) -> Bool { // In order to enable dragging all text type files changed the class // loadable objects from NSString to my custom TEXTClass. return session.canLoadObjects(ofClass: TEXTClass.self) } /** A helper function that serves as an interface to the data model, called by the `tableView(_:itemsForBeginning:at:)` method. */ func dragItems(for indexPath: IndexPath) -> [UIDragItem] { let itemProvider = NSItemProvider() let item = self.getDisplayItem(for: indexPath.row) if item is Note { let note:Note = item as! Note let html = note.noteHTML let data = html?.data(using: .utf8) // Drag to finder creates an html file. itemProvider.suggestedName = note.title + ".html" itemProvider.registerDataRepresentation(forTypeIdentifier: kUTTypeData as String, visibility: .all) { completion in completion(data, nil) return nil } } else { let group:Group = item as! Group let title = group.title let data = title?.data(using: .utf8) // Drag to finder creates a text file. itemProvider.suggestedName = group.title + ".text" itemProvider.registerDataRepresentation(forTypeIdentifier: kUTTypeData as String, visibility: .all) { completion in completion(data, nil) return nil } } return [ UIDragItem(itemProvider: itemProvider) ] } } #endif I would now like to change the result of dragging a Group to the Finder. Instead of creating a Text file from the drag data, I would like to create a Folder containing the Group's Notes. Note: I am unconcerned with the task of assembling the Group/Notes hierarchies as Folder/Files hierarchies because I already have implemented such previously as a menu export command. My concern is where and how I can communicate it to the Finder in the Drag and Drop process. As a first step I thought I would simply create an empty folder from the drag of a Group. So far, none of my experiments have been successful. Every variation of itemProvider.registerDataRepresentation(forTypeIdentifier: or itemProvider.registerFileRepresentation(forTypeIdentifier: or registerItem(forTypeIdentifier:loadHandler: that I have tried has failed to produce anything but empty TEXT files, if they worked at all. It is my understanding that itemProviders may provide directories instead of files, but I have been unable to find any examples of such. My problem may be a lack of understanding of the syntax and usage of the NSItemProvider.LoadHandler completion block. Any Swift examples on point would be greatly appreciated!

If I do something like this: var viewControllers = navigationController.viewControllers if let lastViewController = viewControllers.popLast() { navigationController.viewControllers = viewControllers navigationController.pushViewController(lastViewController, animated: false) } } I got crash: pushing the same view controller instance more than once If I set delay: var viewControllers = navigationController.viewControllers if let lastViewController = viewControllers.popLast() { navigationController.viewControllers = viewControllers DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) { navigationController.pushViewController(lastViewController, animated: false) } } it will work but with unnecessary transitions. Should it work like this in iOS 18 ?

Hi A user of my app has contacted me about a crash they’re getting. They’ve sent me some logs (see attached) but I’m having difficulty working out what the cause is as it looks like it’s a watchdog timeout that’s occurring inside OS code, not my application. I also can’t reproduce the crash locally. App background info: The app logs peoples skydives, each log can contain a lot of data (rotation rates, acceleration, location, speeds, etc) and is stored in a separate file. These files can be stored in an iCloud container so the logs can be viewed from different devices. I use CoreData to maintain a database of key metadata so I can list the jumps in the UI even if the file for a jump isn’t on the device. Occasionally I have to delete this database and rebuild it by loading each jump log file and getting a fresh copy of the metadata. EG this can happen if a new version of the app requires an additional metadata field in the database. Crash info: The crash looks like it’s happening rebuilding the database, so the app will be trying to download and open each jump log and add the records to the database. I’ve noticed the following odd things about the crash log, which might be a good place to start: There’s a huge number of threads in the “”UIDocument File Access” dispatch queue that are blocked It looks like there's exactly 512 threads blocked in this queue. Which makes me think its hitting a limit. Any idea why they are blocked? I don’t know why there are so many, The database rebuild is done from an operation queue with a max concurrency of 10. So I would expect at most 10 jump logs to be being opened at one time There seams to be two common stack trace patterns. Eg compare thread 1 and thread 5 in crash log 1. In both crash logs the main thread is blocked, but in different bits of OS code in the two crash logs. It looks like this is the cause of the watchdog failure, but I’m not sure what the common cause could be. Any ideas / help would be really appreciated. Thanks Tom NOTE: I had to cut down the crash logs so they were small enough to upload. Crash log 1 small.txt Crash log 2 small.txt

0 libobjc.A.dylib 0x000000018e27f008 objc_msgSend + 8 (:-1) 1 CoreFoundation 0x0000000190eaa4bc -[__NSDictionaryM objectForKey:] + 168 (NSDictionaryM.m:179) 2 CoreFoundation 0x0000000190f003e8 -[NSDictionary containsKey:] + 56 (NSDictionary.m:80) 3 CoreFoundation 0x0000000190f0006c CFDictionaryContainsKey + 52 (CFDictionary.c:265) 4 libGSFont.dylib 0x00000001af98cc14 GSFontIsOverriddenSystemFontName + 32 (GSFont.m:2860) 5 CoreText 0x0000000192d6f1fc CopyAttributeForSystemFont(__CFString const*, __CFString const*) + 64 (MetadataSupport.cpp:194) 6 CoreText 0x0000000192d6edd4 AddVariationInfo(TCFMutableDictionary&, __CFString const*) + 60 (SplicedFontSupport.cpp:6760) 7 CoreText 0x0000000192de1ea0 MakeSpliceDescriptor(__CFString const*, unsigned long, __CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, unsigned int, CTFontTextStylePlatform, unsigned int, __CFNumber co... + 4504 (SplicedFontSupport.cpp:7429) 8 CoreText 0x0000000192ddd374 TDescriptorSource::CopySpliceFontForName(__CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, CTFontLegibilityWeight, __CFBoolean const*, __CFNumber const*, __CFString const*... + 1376 (TDescriptorSource.cpp:4288) 9 CoreText 0x0000000192dda800 TDescriptorSource::CopySplicedDescriptorForName(__CFString const*, __CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, CTFontLegibilityWeight, __CFBoolean const*, __CFNumber... + 172 (TDescriptorSource.cpp:4322) 10 CoreText 0x0000000192d0a214 TDescriptor::CreateMatchingDescriptorInternal(__CFSet const*, unsigned long) const + 2332 (TDescriptor.cpp:804) 11 CoreText 0x0000000192d09148 TDescriptor::InitBaseFont(unsigned long, double) + 76 (TDescriptor.cpp:952) https://feedbackassistant.apple.com/feedback/14091158

After updating iOS, my Cordova app behaves incorrectly after receiving a voip push. When a push notification is received, my application launches CallKit, displays the Native Dialer screen and starts other necessary services. Until 17.5.1 (possibly 17.5) everything worked correctly. All services and sockets were established/ connected and working. After updating iOS to 17.5, the application crashes, and while voice connection is established the app is no longer active. Xcode logs have these error messages: Invalidating grant <invalid NS/CF object> failed Type: Error | Timestamp: 2024-06-20 13:27:44.719601+02:00 | Process: MyApp | Library: WebKit | Subsystem: com.apple.WebKit | Category: ProcessCapabilities | TID: 0x3a4929 Invalidating grant <invalid NS/CF object> failed Type: Error | Timestamp: 2024-06-20 13:27:44.732219+02:00 | Process: MyApp | Library: WebKit | Subsystem: com.apple.WebKit | Category: ProcessCapabilities | TID: 0x3a4929 Invalidating grant <invalid NS/CF object> failed Type: Error | Timestamp: 2024-06-20 13:27:44.733996+02:00 | Process: MyApp | Library: WebKit | Subsystem: com.apple.WebKit | Category: ProcessCapabilities | TID: 0x3a4929 I am using: Cordova iOS: 6.2 iOS 17.5.1 Can anyone please help?

I have a project with 2-5k daily online users, but have only 5 users that have this crashes. They all have iOS 16 installed Attached logs from FireBase First Log: Crashed: com.apple.main-thread 0 libobjc.A.dylib 0x1c20 objc_msgSend + 32 1 UIKitCore 0x9bd754 -[UIView _backing_traitCollectionDidChange:] + 64 2 UIKitCore 0x169754 -[UIView _traitCollectionDidChangeInternal:] + 628 3 UIKitCore 0x1692b4 -[UIView _wrappedProcessTraitCollectionDidChange:forceNotification:] + 156 4 UIKitCore 0x169424 -[UIView _wrappedProcessTraitCollectionDidChange:forceNotification:] + 524 5 UIKitCore 0x927e8 -[UIView(AdditionalLayoutSupport) _withUnsatisfiableConstraintsLoggingSuspendedIfEngineDelegateExists:] + 96 6 UIKitCore 0x90cac -[UIView _processDidChangeRecursivelyFromOldTraits:toCurrentTraits:forceNotification:] + 212 7 UIKitCore 0x43d0 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1732 8 QuartzCore 0x97fc CA::Layer::layout_if_needed(CA::Transaction*) + 500 9 QuartzCore 0x1ceb0 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 148 10 QuartzCore 0x2e234 CA::Context::commit_transaction(CA::Transaction*, double, double*) + 444 11 QuartzCore 0x63630 CA::Transaction::commit() + 652 12 UIKitCore 0x3c49c4 -[_UISceneLifecycleMultiplexer collectBackingStores] + 28 13 UIKitCore 0x3c4988 __35-[UIWindowScene _prepareForSuspend]_block_invoke + 40 14 UIKitCore 0x3026dc -[_UIContextBinder purgeContextsWithPurgeAction:afterPurgeAction:] + 388 15 UIKitCore 0x21053c -[UIWindowScene _prepareForSuspend] + 80 16 UIKitCore 0x20ebb8 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 752 17 UIKitCore 0x20e810 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 244 18 UIKitCore 0x20e650 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 336 19 FrontBoardServices 0x366c -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:] + 420 20 FrontBoardServices 0x34a8 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2 + 144 21 FrontBoardServices 0x6c24 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 168 22 FrontBoardServices 0x6b40 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke + 340 23 libdispatch.dylib 0x3f88 _dispatch_client_callout + 20 24 libdispatch.dylib 0x7a08 _dispatch_block_invoke_direct + 264 25 FrontBoardServices 0x10d40 FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 52 26 FrontBoardServices 0x108dc -[FBSSerialQueue _targetQueue_performNextIfPossible] + 220 27 FrontBoardServices 0x13184 -[FBSSerialQueue _performNextFromRunLoopSource] + 28 28 CoreFoundation 0xd5f24 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 28 29 CoreFoundation 0xe22fc __CFRunLoopDoSource0 + 176 30 CoreFoundation 0x661c0 __CFRunLoopDoSources0 + 244 31 CoreFoundation 0x7bb7c __CFRunLoopRun + 836 32 CoreFoundation 0x80eb0 CFRunLoopRunSpecific + 612 33 GraphicsServices 0x1368 GSEventRunModal + 164 34 UIKitCore 0x3a1668 -[UIApplication _run] + 888 35 UIKitCore 0x3a12cc UIApplicationMain + 340 36 Vostok 0x1e36ec main + 10 (main.swift:10) 37 ??? 0x1ac74c960 (Missing) All this crashed happened on background Can't reproduce on own iPhone, because haven't 16 iOS

I have an iOS app, with a watch counterpart, used to enter scores for a match. The watch app starts a match (and a workout session) when it receives a notification from the mobile app, after the user started a match on their phone. Basically the watch app is just a more convenient way of inputing scores, so the user wouldn't have to reach for and unlock their phone every time - therefore the need for the watch app to always be displayed. The flow follows these steps: the user is prompted for workout session access when first launching the app; after they accept, I start the workout; the delegate method workoutSession(didChangeTo) returns the expected values; the app remains active, even when the user lowers their wrist; when I go to the clock, the app's icon is displayed in a circle at the top (bringing the app back to foreground on tap). The only problem is that the "Return to app" option in the "Return to Clock" settings menu is missing, what do I need to do in order to display it? Here's an example of what it looks like for the Strava app: and how it looks for mine.

While using the native AVfoundation for recording videos I am able to see black frames/ screen in the beginning and end of the video for 2 millisecond at the end and beginning . func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) { guard isRecording, let assetWriter = assetWriter else { return } let timestamp = CMSampleBufferGetPresentationTimeStamp(sampleBuffer) if recordingStartTime == nil { recordingStartTime = timestamp let adjustedStartTime = CMTimeAdd(timestamp, CMTimeMake(value: -2, timescale: 1000)) // Adjust start time slightly earlier assetWriter.startSession(atSourceTime: adjustedStartTime) print("Status: \(assetWriter.status.rawValue)") } if output == videoOutput { if videoInput?.isReadyForMoreMediaData == true { videoInput?.append(sampleBuffer) } } else if output == audioOutput { if audioInput?.isReadyForMoreMediaData == true { audioInput?.append(sampleBuffer) } } if let startTime = recordingStartTime, CMTimeSubtract(timestamp, startTime) >= recordingInterval { isRecording = false let adjustedEndTime = CMTimeAdd(timestamp, CMTimeMake(value: 2, timescale: 1000)) // Adjust end time slightly later assetWriter.finishWriting { [weak self] in print("Finished writing segment") self?.startRecording() // Start a new recording segment } recordingStartTime = nil } }

Is there any way to have a UIBlurEffectView ignore views underneath it? More than just masking it. Mask of a view below it, it'll still process that view and you'll still see a "halo" around the edge. Ideally I'd like to have a view 'below' the blur, mask it, and also not have the view be processed in the blur.

Repo is here Visual Description is here: Basically the red view should never be inside the blue view. The red view has a fixed aspect ratio. The blue view initially has an aspect ratio different from the red view and is animated to have the same aspect ratio. The red view is constrained inside the blue view as follows: let ac = brokenView.widthAnchor.constraint(equalTo: brokenView.heightAnchor, multiplier: 9/16) let xc = brokenView.centerXAnchor.constraint(equalTo: animView.centerXAnchor) let yc = brokenView.centerYAnchor.constraint(equalTo: animView.centerYAnchor) let widthC = brokenView.widthAnchor.constraint(equalTo: animView.widthAnchor) widthC.priority = .defaultLow let gewc = brokenView.widthAnchor.constraint(greaterThanOrEqualTo: animView.widthAnchor) let geHC = brokenView.heightAnchor.constraint(greaterThanOrEqualTo: animView.heightAnchor) geHC.priority = .required So the red view should start at equal width, but prioritize always been taller and wider than the blue view while staying centered and keeping a fixed aspect ratio. As you can see in the visual description it is not priortizing being taller. Any suggestions on how to fix, work around, or otherwise get past this would be appreciated. Really trying to avoid manually doing a spring animation with keyframes and an assload of math. I have filed a bug on feedback assistant, but figured someone here might have experience//know how. Thanks

We have a UITabBarController in our iPhone App which has 5 tabs with UITableViewControllers (constructed from the storyboard). Before iOS18 beta 1 (and 2) this was working fine without any problems (objective-C). Since iOS18 beta 1 (and beta 2 still has this problem) a strange render glitch occurs when activating a tab from the tab bar at the bottom. As soon as a tab is activated (by tapping on the icon at the bottom) the tab with the UITableViewController becomes visible and draws its content starting at the very top of the screen (pos 0,0) right through/over the Navigation bar which at that point is showing a title and a rightBarButtonItem. The tab with the UITableViewController seems not aware there is a navigation bar visible. Then after ~0.3 seconds the tab with the UITableViewContoller is automatically rendered again or moved down and now its content starts below the UINavigationBar as expected, this is 100% reproducible and occurs on every activation of a tab in the UITabBarController. Is anyone else also getting this behavior in their App since iOS18? I'm aware that UITabBarController is being renewed but I can't find any information on why this behavior might occur. I was hoping beta 2 would solve the problem but it doesn't. Constructing the UITabBarController in the code with the new UITab objects (instead of constructing them from the storyboard) also shows this problem.

I have a sports iOS app with a paired watch app, that uses location to update some UI elements. I technically need the location only when the watch app is in foreground, but since another requirement is to stop the clock from replacing the app, I decided to add background location checks. I followed the steps from the documentation (adding Background Modes to the watch extension target, setting allowsBackgroundLocationUpdates to true): the location update works fine when I go to the clock, the app's icon is displayed in a circle at the top (bringing the app back to foreground on tap). The only problem is that the "Return to app" option in the "Return to Clock" settings menu is missing, what do I need to do in order to display it? Here's an example of what it looks like for the Strava app: and how it looks for mine.

Hello, Our application communicates with our hardware to control a motor. For security reasons, if an alert, popup or window appears, we must stop the motor immediately. I haven't found how to detect (event ?, notification ?, delegate ?) the window if a user swipe their finger to the (bottom right) corner of the screen to display the «Quick note». The bottom left corner (screenshot) works fine, the motor is stopped. Is there a way to capture an event or notification when the «Quick Note» window is displayed or cleared ? Thanks,

At a WWDC24 consultation with the keyboards and input team, I was referred to the UITextInputContext class for detecting hardware keyboard status. However, it's not obvious how this class is intended to be used. I would like to receive notifications when the UITextInputContext state changes, however, I see no way to accomplish this. I've tried using KVO to observe state changes of the current property of UITextInputContext.class or the hardwareKeyboardInputExpected property of UITextInputContext.current, but receive no change notifications when a USB hardware keyboard is attached/detached, and hit an assertion when trying to stop observing, indicating that the observer is not registered. So I don't think KVO works. I am interested in knowing whether a hardware keyboard is attached when the virtual onscreen keyboard is hidden or shown (which occurs when the hardware keyboard is attached/detached), so that I may adjust the state of my inputAccessoryView accordingly (it should be hidden when a hardware keyboard is attached). I've had some success checking the state of UITextInputContext.current.hardwareKeyboardInputExpected during keyboard willHide/willShow notifications (or in a block executed via dispatch_async()), however, it seems that the property value does not change until the first key press after attaching a hardware keyboard, or after the first virtual onscreen key press after detaching a hardware keyboard. The latter is problematic because there are no more keyboard hide/show notifications in which to perform the needed update to my inputAccessoryView UI after the UITextInputContext state change occurs following hardware keyboard disconnection. Perhaps it's meant that I should monitor key press events and check the status there instead?

In testing my app with the WWDC24 iOS 18 beta, I have noticed that most of the menu items in the navigation bar and title menu are either missing, disabled, or nonfunctional. The structure of my app's UI is a UIDocumentController subclass as the root view controller of a UINavigationController. In debugging the problem with title menu items, I noticed that the responder chain from the UICommand.sender now starts at the UINavigationBar and goes up from there, without passing through the UIDocumentViewController itself. Now, only the actions I've defined in the AppDelegate are accessible. I'm not exactly sure how this was organized on iOS 17, but the responder chain did include the UIDocumentViewController, where I have implemented most of the menu item actions. This seems like a UIKit bug, but I am investigating possible workarounds in case Apple does not fix it. Suggestions welcome.

In the past, it seemed that if you used the app switcher and killed the app, that state restoration data would not persist, and starting the app again would not load any stored state data. But now (at lest in iOS 17) that is no longer the case. There are situations where the old state might cause issues, which we obviously need to fix, but users should be able to clear the state data. I am not using sessions and am using the older methods - application:shouldSaveApplicationState: and application:shouldRestoreApplicationState:. My question is, how can I tell my users to reset/clear state restoration data if needed?

Hi, I'm trying to investigate if there is any way to have an app that displays an automaker app when the Carplay environment has the automaker protocol string, and displays a Carplay App (Driving Task) when there isn't the automaker protocol string. I was able to start developing an automaker app, but with an iOS16.0 deprecated method (with UIScreen Notifications), I'm not able to do it via the scene delegate... There is any kind of documentation of how to do it? I think the clue may be in the scene delegate with the property Preferred Default Scene Session Role, where I think the automaker app is a Window Application Session Role, but the scene delegate is not triggered when I open the Carplay App in the simulator. So am I missing something? Is there a way to do it or have I to publish two apps in order to use the two kind of carplay apps... ? Thank you very much.

macOS 15 introduces SwiftUI.WindowLevel for macOS which allows setting the level of windows. Is there an equivalent new API for UIKit.UIWindowScene on Mac Catalyst? I haven't been able to find it.

On iOS18 beta1 & beta2 builds, calling collectionView.cancelInteractiveTransition() after a call to startInteractiveTransition(to:completion:) seems to remove the intermediate transition layout object from the collection view, but doesn't reinstalls the original layout, which results in the collection view disappearing completely. This was not the case in previous iOS versions, so maybe a beta bug? Possibly related, Xcode logs the following error in the console in the exact moment when the collectionView disappears: “Requesting visual style in an implementation that has disabled it, returning nil. Behavior of caller is undefined.” I filled a bug report, together with sample project, just in case FB14057335 Thanks!