Explore the various UI frameworks available for building app interfaces. Discuss the use cases for different frameworks, share best practices, and get help with specific framework-related questions.

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.contactAccessPicker shows blank sheet on iOS 26.1
I’m running into an issue using .contactAccessPicker on a device running iOS 26.1 - a blank sheet appears instead of the expected Contact Access Picker. It works on: Simulator (iOS 26.0) Device + Simulator (iOS 18.6) The issue appears specific to real devices on iOS 26.0+. Environment: Device: iPhone 16 Pro iOS Versions Tested: 26.0 and 26.1 Xcode 26.0.1 SwiftUI app, deployment target: iOS 17+ @available(iOS 18.0, *) private var contactPicker: some View { contactsSettingsButton("Title") { showContactPicker = true } .contactAccessPicker(isPresented: $showContactPicker) { _ in Task { await contactManager.fetchContacts() showSelectContacts = true } } } Filed a Feedback: FB20929400 Is there a known workaround?
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CarPlay: CPListImageRowItem images and CPNowPlayingTemplate buttons occasionally not displaying (requires device reboot)
Device: iPhone 17 Pro Max iOS version: iOS 26.3 CarPlay type: Wired We are encountering two intermittent UI issues in CarPlay when running our music application. The problems occur occasionally and cannot be recovered without restarting the device. Issue 1: CPListImageRowItem image not displaying On the CarPlay home page, some images occasionally fail to appear. Implementation details: The list is updated using CPListTemplate.updateSections. Each item is a CPListImageRowItem. On iOS versions below 26, images are updated using updateImages. On iOS 26, images are provided through CPListImageRowItem.elements, where each element is a CPListImageRowItemRowElement. Observed behavior: Logs confirm that the data is correctly provided. However, in failing cases the CPListImageRowItemRowElement appears with both title and subtitle equal to nil. The image is not rendered in the UI even though the item exists. Issue 2: Now Playing bottom buttons occasionally missing On the Now Playing screen, the bottom control buttons sometimes fail to appear. Implementation details: Buttons are updated using CPNowPlayingTemplate.updateNowPlayingButtons. The buttons are instances of CPNowPlayingImageButton. Observed behavior: Occasionally the buttons are not displayed. Once this occurs, the UI does not recover. Restarting the phone immediately resolves the issue. Additional observations The issue appears to occur intermittently. Once triggered, it persists until the device is rebooted. Similar behavior has been observed in other music apps (for example, QQ Music). Questions Are there known CarPlay UI rendering issues related to CPListImageRowItem or CPNowPlayingTemplate in recent iOS versions? Is there any recommended workaround or lifecycle handling that might prevent these UI elements from failing to render? Any guidance would be greatly appreciated.
Topic: UI Frameworks SubTopic: UIKit Tags:
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ShareLink "save Image" action dismiss parent view
ShareLink works fine except for save image action which dismiss the presenting view first time system shows the premission alert so image get saved without any problem but for the next saves image get saved then share sheet dismiss and also presenting view dismiss as well here is a sample code ` internal import System import UniformTypeIdentifiers import SwiftUI struct RootView: View { @State private var isPresented: Bool = false var body: some View { ZStack { Color.white Button("Show parent view") { isPresented = true } } .sheet(isPresented: $isPresented) { ParentView() } } } struct ParentView: View { @State private var isPresented: Bool = false var body: some View { NavigationStack { ZStack { Color.red.opacity(0.5) } .toolbar { ToolbarItem() { let name = "\(UUID().uuidString)" let image = UIImage(named: "after")! return ShareLink( item: ShareableImage(image: image, fileName: name), preview: SharePreview( name, image: Image(uiImage: image) ) ) { Image(uiImage: UIImage(resource: .Icons.share24)) .resizable() .foregroundStyle(Color.black) .frame(width: 24, height: 24) } } } } } } struct ShareableImage: Transferable { let image: UIImage let fileName: String static var transferRepresentation: some TransferRepresentation { FileRepresentation(exportedContentType: .png) { item in let fileURL = FileManager.default.temporaryDirectory .appendingPathComponent(item.fileName) .appendingPathExtension("png") guard let data = item.image.pngData() else { throw NSError(domain: "ImageEncodingError", code: 0) } try data.write(to: fileURL) return SentTransferredFile(fileURL) } } } `
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Gesture & SimultaneousGesture interfere with ScrollView behaviour.
I have faced a problem while I was trying to implement a reorder drag & drop view. I found that when I add any kind of .gesture or .simultaneousGesture, a ScrollView's scrolling behavior wasn't working properly (does not scroll at all). ScrollView(.vertical, showsIndicators: false) { ForEach($items) { $item in EditorCard(stepDetails: item) .simultaneousGesture( customCombinedGesture(item) ) } } This ScrollView worked fine with .onLongPressGesture(), however, I wanted to use custom gestures sequences.
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macOS 26: NSTokenField crashes due to NSGenericException caused by too many Update Constraints
This example application crashes when entering any text to the token field with FAULT: NSGenericException: The window has been marked as needing another Update Constraints in Window pass, but it has already had more Update Constraints in Window passes than there are views in the window. The app uses controlTextDidChange to update a live preview where it accesses the objectValue of the token field. If one character is entered, it also looks like the NSTokenFieldDelegate methods tokenField(_:styleForRepresentedObject:) tokenField(_:editingStringForRepresentedObject:) tokenField(_:representedObjectForEditing:) are called more than 10000 times until the example app crashes on macOS Tahoe 26 beta 6. I've reported this issue with beta 1 as FB18088608, but haven't heard back so far. I have multiple occurrences of this issue in my app, which is working fine on previous versions of macOS. I haven't found a workaround yet, and I’m getting anxious of this issue persisting into the official release.
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Cross-domain issue in wkwebview
Subject: Cross-Domain Access Behaviour in WKWebView – Clarification Required Description: We are facing a cross-domain issue in our iOS application where WKWebView loads content from one domain and attempts to access resources/data from another domain. Current Setup: App Platform: iOS WebView: WKWebView iOS Version: 26 Primary Domain: *.franconnectqa.net Data/Analytics Domain: analytics.franconnectdev.net SSL: Valid certificates configured ATS: Enabled Issue: When WKWebView loads content from franconnectqa.net, it attempts to access resources or analytics from analytics.franconnectdev.net, resulting in cross-domain restrictions. We would like to understand: Does WKWebView support cross-domain resource access by default? Are there any configuration settings that allow controlled cross-domain access? Are there known limitations regarding cookies, local storage, or session sharing across domains? Does WKWebView enforce additional restrictions beyond standard browser CORS policies? Are there recommended best practices for handling cross-domain scenarios in WKWebView? Expected Behavior: We want to determine whether: Cross-domain access is supported under certain configurations, OR The recommended approach is to align all resources under the same domain. Kindly provide guidance on the supported architecture and any configuration recommendations.
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Is there a way in AppKit to apply the Liquid Glass soft edge effect to a view placed outside an NSScrollView?
I’m developing a text editor that provides a line number view. This view is placed next to the NSScrollView that contains the main text view, rather than inside the scroll view. The line number view updates its drawing in sync with the NSScrollView’s scrolling and text editing in the NSTextView, so it can display the correct line numbers. This approach worked fine through macOS 15, but on macOS 26 with Liquid Glass, the line numbers end up being drawn without the expected blur/soft edge effect under the window toolbar area. In AppKit, some view controllers provide APIs to switch edge effects between soft/hard, but I can’t find any API to control this for the window toolbar region. I considered simply not drawing the numbers outside the content area, but if possible I’d like to apply the Tahoe-style soft edge effect instead. Does anyone have ideas? Is this currently impossible, meaning the only option is to file a feedback/API request? Also, for various reasons, the traditional approach of implementing line numbers by subclassing NSRulerView is difficult for my app.
Topic: UI Frameworks SubTopic: AppKit
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iOS 26: default gray background on UITabBarItem
In iOS 26, when a UITabBarItem is selected, a gray background appears behind the selected item. This seems to happen automatically with the new tab bar design. I tried configuring the tab bar using UITabBarAppearance, but the background highlight still appears. Is this the expected behavior in iOS 26 or is there a recommended way to configure the tab bar so that only the icon and title change color when selected?
Topic: UI Frameworks SubTopic: UIKit
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Crash in SwiftUICore SDFStyle.distanceRange.getter
I've been receiving crash reports about a crash in SDFStyle.distanceRange.getter. I haven't been able to reproduce this, and users haven't given me much information about the circumstances or can't reliably reproduce this either. Googling didn't give any results. I'm happy for any pointers in the right direction. All reports have been on iOS 26 so far. 2026-03-02_23-35-03.7381_+0800-93830d0f537cfb381b42a7e9812953d772adfe64.crash
Topic: UI Frameworks SubTopic: SwiftUI
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TextKit 2 + SwiftUI (NSViewRepresentable): NSTextLayoutManager rendering attributes don’t reliably draw/update
I’m embedding an NSTextView (TextKit 2) inside a SwiftUI app using NSViewRepresentable. I’m trying to highlight dynamic subranges (changing as the user types) by providing per-range rendering attributes via NSTextLayoutManager’s rendering-attributes mechanism. The issue: the highlight is unreliable. Often, the highlight doesn’t appear at all even though the delegate/data source is returning attributes for the expected range. Sometimes it appears once, but then it stops updating even when the underlying “highlight range” changes. This feels related to SwiftUI - AppKit layout issue when using NSViewRepresentable (as said in https://developer.apple.com/documentation/swiftui/nsviewrepresentable). What I’ve tried Updating the state that drives the highlight range and invalidating layout fragments / asking for relayout Ensuring all updates happen on the main thread. Calling setNeedsDisplay(_:) on the NSViewRepresentable’s underlying view. Toggling the SwiftUI view identity (e.g. .id(...)) to force reconstruction (works, but too expensive / loses state). Question In a SwiftUI + NSViewRepresentable setup with TextKit 2, what is the correct way to make NSTextLayoutManager re-query and redraw rendering attributes when my highlight ranges change? Is there a recommended invalidation call for TextKit 2 to trigger re-rendering of rendering attributes? Or is this a known limitation when hosting NSTextView inside SwiftUI, where rendering attributes aren’t reliably invalidated? If this approach is fragile, is there a better pattern for dynamic highlights that avoids mutating the attributed string (to prevent layout/scroll jitter)?
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Switching to custom keyboard size glitches
I've created a custom keyboard and implemented the: class KeyboardViewController: UIInputViewController The imlementation looks like this: override func viewDidLoad() { super.viewDidLoad() var stack = UIStackView() stack.axis = .vertical stack.spacing = 8 stack.translatesAutoresizingMaskIntoConstraints = false stack.distribution = .fill stack.heightAnchor.constraint(equalToConstant: 200).isActive = true .... view.addSubview(stack) NSLayoutConstraint.activate([ stack.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20), stack.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20), stack.topAnchor.constraint(equalTo: view.topAnchor, constant: 10), stack.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -10) ]) The problem is that the keyboard seems to start showing in the size (I've printed the parent frame): Optional(<UIView: 0x101008480; frame = (0 0; 390 844); autoresize = W+H; layer = <CALayer: 0x600000207b80>>) and than resizes to my given height. But it's not fast enough so that I can see some glitches whenever I switch from another keyboard to my custom keyboard. Is there a way to prevent this resizing or start the keyboard in a given size? This is just not the best user experience.
Topic: UI Frameworks SubTopic: UIKit
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How do you disable split view tracking separators in macOS 26 Tahoe?
In the attached screenshot, we have an NSSplitViewController with three split view items. The first two are viewController split view items, while the third is an inspector split view item. The NSWindow is configured for full screen content so that the inspector split view items is full height itself. However, when we enable full height content view, AppKit is automatically adding a tracking separator into the toolbar when we don't want one. (Neither of the two split views are sidebars.) This tracking separator is out of place, cannot be dragged itself, and is drawn under the center aligned segmented control. We've tried a multitude of permutations to configure the NSWindow, NSToolbar and NSSplitViewItem but to no avail. Surely we're just missing the magic combo but a lot of the properties appear to be no-ops in macOS 26. How do we use an NSSplitViewController, in a full screen content window, such that we get a full height inspector but we don't get tracking separators for the main split view divider?
Topic: UI Frameworks SubTopic: AppKit Tags:
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Source view disappearing when interrupting a zoom navigation transition
When I use the .zoom transition in a navigation stack, I get a glitch when interrupting the animation by swiping back before it completes. When doing this, the source view disappears. I can still tap it to trigger the navigation again, but its not visible on screen. This seems to be a regression in iOS 26, as it works as expected when testing on iOS 18. Has someone else seen this issue and found a workaround? Is it possible to disable interrupting the transition? Filed a feedback on the issue FB19601591 Screen recording: https://share.icloud.com/photos/04cio3fEcbR6u64PAgxuS2CLQ Example code @State var showDetail = false @Namespace var namespace var body: some View { NavigationStack { ScrollView { showDetailButton } .navigationTitle("Title") .navigationBarTitleDisplayMode(.inline) .navigationDestination(isPresented: $showDetail) { Text("Detail") .navigationTransition(.zoom(sourceID: "zoom", in: namespace)) } } } var showDetailButton: some View { Button { showDetail = true } label: { Text("Show detail") .padding() .background(.green) .matchedTransitionSource(id: "zoom", in: namespace) } } }
Topic: UI Frameworks SubTopic: SwiftUI
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Incorrect menu consistency warnings logged in Tahoe for NSStatusItem, performance issues related?
Is anyone else getting new warning about menu items with submenus when running on Tahoe? I'm getting big performance problems using my menu as well as seeing these messages and I'm wondering if there's a connection. My app is faceless with a NSStatusItem with an NSMenu. Specifically it's my own subclass of NSMenu where I have a lot of code to manage the menu's dynamic behavior. This code is directly in the menu subclass instead of in a controller because the app I forked had it this way, a little wacky but I don't see it being a problem. A nib defines the contents of the menu, and it's instantiated manually with code like: var nibObjects: NSArray? = [] guard let nib = NSNib(nibNamed: "AppMenu", bundle: nil) else { ... } guard nib.instantiate(withOwner: owner, topLevelObjects: &nibObjects) else { ... } guard let menu = nibObjects?.compactMap({ $0 as? Self }).first else { ... } Within that nib.instantiate call I see a warning logged that seems new to Tahoe, before the menu's awakeFromNib is called, that says (edited): Internal inconsistency in menus - menu <NSMenu: 0x6000034e5340> believes it has <My_StatusItem_App.AppMenu: 0x7f9570c1a440> as a supermenu, but the supermenu does not seem to have any item with that submenu My_StatusItem_App.AppMenu: 0x7f9570c1a440 is my menu belonging to the NSStatusItem, NSMenu: 0x6000034e5340 is the submenu of one of its menu items. At a breakpoint in the NSMenu subclass's awakeFromNib I print self and see clear evidence of the warning's incorrectness. Below is a snippet of the console including the full warning, only edited for clarity and brevity. It shows on line 32 menu item with placeholder title "prototype batch item" that indeed has that submenu. Internal inconsistency in menus - menu <NSMenu: 0x6000034e5340> Title: Supermenu: 0x7f9570c1a440 (My StatusItem App), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( "<NSMenuItem: 0x6000010e4fa0 Do The Thing Again, ke mask='<none>'>", "<NSMenuItem: 0x6000010e5040 Customize\U2026, ke mask='<none>'>", "<NSMenuItem: 0x6000010e50e0, ke mask='<none>'>" ) believes it has <My_StatusItem_App.AppMenu: 0x7f9570c1a440> Title: My StatusItem App Supermenu: 0x0 (None), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( ) as a supermenu, but the supermenu does not seem to have any item with that submenu (lldb) po self <My_StatusItem_App.AppMenu: 0x7f9570c1a440> Title: My StatusItem App Supermenu: 0x0 (None), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( "<NSMenuItem: 0x6000010fd7c0 About My StatusItem App\U2026, ke mask='<none>', action: showAbout:, action image: info.circle>", "<NSMenuItem: 0x6000010fd860 Show Onboarding Window\U2026, ke mask='Shift', action: showIntro:>", "<NSMenuItem: 0x6000010fd900 Update Available\U2026, ke mask='<none>', action: installUpdate:, standard image: icloud.and.arrow.down, hidden>", "<NSMenuItem: 0x6000010e46e0, ke mask='<none>'>", "<NSMenuItem: 0x6000010e4780 Start The Thing, ke mask='<none>', action: startTheThing:>", "<NSMenuItem: 0x6000010e4dc0 \U2318-\U232b key detector item, ke mask='<none>', view: <My_StatusItem_App.KeyDetectorView: 0x7f9570c1a010>>", "<NSMenuItem: 0x6000010e4e60, ke mask='<none>'>", "<NSMenuItem: 0x6000010e4f00 saved batches heading item, ke mask='<none>', view: <NSView: 0x7f9570b4be10>, hidden>", "<My_StatusItem_App.BatchMenuItem: 0x6000016e02c0 prototype batch item, ke mask='<none>', action: replaySavedBatch:, submenu: 0x6000034e5340 ()>", "<NSMenuItem: 0x6000010f7d40, ke mask='<none>'>", "<My_StatusItem_App.ClipMenuItem: 0x7f956ef14fd0 prototype copy clip item, ke mask='<none>', action: copyClip:>", "<NSMenuItem: 0x6000010fa620 Settings\U2026, ke='Command-,', action: showSettings:>", "<NSMenuItem: 0x6000010fa6c0, ke mask='<none>'>", "<NSMenuItem: 0x6000010fa760 Quit My StatusItem App, ke='Command-Q', action: quit:>" ) Is this seemingly incorrect inconsistency message harmless? Am I only grasping at straws to think it has some connection to the performance issues with this menu?
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URLByResolvingAliasFileAtURL: Appears to Be Broken - resolves to the the wrong folder
So if I create an Alias of a folder in Finder and hand the alias to my app (I also moved the alias file to a new folder, but I did not move the original folder)...so then my app resolves the alias using: NSURL +URLByResolvingAliasFileAtURL: What happens? The resolved URL points to a completely different folder. Well not completely different. It resolves to a folder that happens to share same last path component as the original folder...but this folder is inside the same parent folder the alias file is in. It does not resolve to the original folder I created the alias of. So then once my app touches the alias with +URLByResolvingAliasFileAtURL: the alias now resolves to this new (wrong) location (even in Finder). Couple details: My app is not sandboxed. I have permission to access the original folder in my app (but even if I didn't the alias shouldn't be mutated just by merely resolving it). Only seems to happen if the folder I move the alias to happens to contain a sibling folder that has the same title as the original folder. Like it's just deleting the last path component of the alias and then appending the last path component of the original filename and just going with that. I hope that makes sense. I tried creating the alias myself using -bookmarkDataWithOptions: and going the other way (to Finder) but Finder must be resolving the alias using a different API because it resolves to the original location as expected.
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Question: How to support landscape-only on iPad app after 'Support for all orientations will soon be required' warning
Dear Apple Customer Support, I’m developing a new Swift iPadOS app and I want the app to run in landscape only (portrait disabled). In Xcode, under Target &gt; General &gt; Deployment Info &gt; Device Orientation, if I select only Landscape Left and Landscape Right, the app builds successfully, but during upload/validation I receive this message and the upload is blocked: “Update the Info.plist: Support for all orientations will soon be required.” Could you please advise what the correct/recommended way is to keep an iPad app locked to landscape only while complying with the current App Store upload requirements? Is there a specific Info.plist configuration (e.g., UISupportedInterfaceOrientations~ipad) or another setting that should be used? Thank you,
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Putting 2 existing pdf pages side by side (half size) in a new pdf
In Swift, iOS, I have a pdf file. I want to take the pages 2 by 2 and put them side by side, on the new page. For this, I have to scale initial pages half size and rotate .pi/2. I managed to achieve this by converting pdf pages to UIImages and using a UIGraphicsImageRenderer. But with a critical loss of resolution. I've tried improving the resolution by creating images as jpegData(withCompressionQuality: 1.0), to no avail. So I would need to work directly on the pdf pages using CGPDFDocument format. The code structure is as follows, to insert a single scaled page: for iPage in … { if let _page = theCGPdfDocument.page(at: 1) { var _pageRect: CGRect = _page.getBoxRect(CGPDFBox.mediaBox) writeContextInDestination!.beginPage(mediaBox: &_pageRect) // translate to compensate for the flip caused displacement writeContextInDestination!.translateBy(x: _pageRect.size.width, y: _pageRect.size.height) Scale (-1, -1) // rotate 180° // add rotate as needed writeContextInDestination!.scaleBy(x: -1, y: -1) writeContextInDestination!.clip(to: _pageRect) writeContextInDestination!.drawPDFPage(_page) writeContextInDestination!.endPage() // end the current page } } writeContextInDestination!.closePDF() But I do not succeed in inserting the drawing of the second page. I've tried repeating lines 7 to 11 for a second page at line 13. No success. What is the direction to look for ?
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SwiftUI and undo
In my multiplatform SwiftUI document app, where should I implement undo? In the Views with Forms and Lists, Bindings, data classes or somewhere else? I am now implementing undo in Bindings and Lists, but I'm wondering if that's the right way to do it.
Topic: UI Frameworks SubTopic: SwiftUI
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Confirmation Items Regarding the Mandatory UIScene Lifecycle Support in iOS 27
After reviewing the following Apple Technote, I have confirmed the statement below: https://developer.apple.com/documentation/technotes/tn3187-migrating-to-the-uikit-scene-based-life-cycle In the next major release following iOS 26, UIScene lifecycle will be required when building with the latest SDK; otherwise, your app won’t launch. While supporting multiple scenes is encouraged, only adoption of scene life-cycle is required. Based on the above, I would appreciate it if you could confirm the following points: Is my understanding correct that the term “latest SDK” refers to Xcode 27? Is it correct that an app built with the latest SDK (Xcode 27, assuming the above understanding is correct) will not launch without adopting the UIScene lifecycle, with no exceptions? Is it correct that an app built with Xcode 26 without UIScene lifecycle support will still launch without issues on an iPhone updated to iOS 27?
Topic: UI Frameworks SubTopic: General Tags:
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.contactAccessPicker shows blank sheet on iOS 26.1
I’m running into an issue using .contactAccessPicker on a device running iOS 26.1 - a blank sheet appears instead of the expected Contact Access Picker. It works on: Simulator (iOS 26.0) Device + Simulator (iOS 18.6) The issue appears specific to real devices on iOS 26.0+. Environment: Device: iPhone 16 Pro iOS Versions Tested: 26.0 and 26.1 Xcode 26.0.1 SwiftUI app, deployment target: iOS 17+ @available(iOS 18.0, *) private var contactPicker: some View { contactsSettingsButton("Title") { showContactPicker = true } .contactAccessPicker(isPresented: $showContactPicker) { _ in Task { await contactManager.fetchContacts() showSelectContacts = true } } } Filed a Feedback: FB20929400 Is there a known workaround?
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CarPlay: CPListImageRowItem images and CPNowPlayingTemplate buttons occasionally not displaying (requires device reboot)
Device: iPhone 17 Pro Max iOS version: iOS 26.3 CarPlay type: Wired We are encountering two intermittent UI issues in CarPlay when running our music application. The problems occur occasionally and cannot be recovered without restarting the device. Issue 1: CPListImageRowItem image not displaying On the CarPlay home page, some images occasionally fail to appear. Implementation details: The list is updated using CPListTemplate.updateSections. Each item is a CPListImageRowItem. On iOS versions below 26, images are updated using updateImages. On iOS 26, images are provided through CPListImageRowItem.elements, where each element is a CPListImageRowItemRowElement. Observed behavior: Logs confirm that the data is correctly provided. However, in failing cases the CPListImageRowItemRowElement appears with both title and subtitle equal to nil. The image is not rendered in the UI even though the item exists. Issue 2: Now Playing bottom buttons occasionally missing On the Now Playing screen, the bottom control buttons sometimes fail to appear. Implementation details: Buttons are updated using CPNowPlayingTemplate.updateNowPlayingButtons. The buttons are instances of CPNowPlayingImageButton. Observed behavior: Occasionally the buttons are not displayed. Once this occurs, the UI does not recover. Restarting the phone immediately resolves the issue. Additional observations The issue appears to occur intermittently. Once triggered, it persists until the device is rebooted. Similar behavior has been observed in other music apps (for example, QQ Music). Questions Are there known CarPlay UI rendering issues related to CPListImageRowItem or CPNowPlayingTemplate in recent iOS versions? Is there any recommended workaround or lifecycle handling that might prevent these UI elements from failing to render? Any guidance would be greatly appreciated.
Topic: UI Frameworks SubTopic: UIKit Tags:
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ShareLink "save Image" action dismiss parent view
ShareLink works fine except for save image action which dismiss the presenting view first time system shows the premission alert so image get saved without any problem but for the next saves image get saved then share sheet dismiss and also presenting view dismiss as well here is a sample code ` internal import System import UniformTypeIdentifiers import SwiftUI struct RootView: View { @State private var isPresented: Bool = false var body: some View { ZStack { Color.white Button("Show parent view") { isPresented = true } } .sheet(isPresented: $isPresented) { ParentView() } } } struct ParentView: View { @State private var isPresented: Bool = false var body: some View { NavigationStack { ZStack { Color.red.opacity(0.5) } .toolbar { ToolbarItem() { let name = "\(UUID().uuidString)" let image = UIImage(named: "after")! return ShareLink( item: ShareableImage(image: image, fileName: name), preview: SharePreview( name, image: Image(uiImage: image) ) ) { Image(uiImage: UIImage(resource: .Icons.share24)) .resizable() .foregroundStyle(Color.black) .frame(width: 24, height: 24) } } } } } } struct ShareableImage: Transferable { let image: UIImage let fileName: String static var transferRepresentation: some TransferRepresentation { FileRepresentation(exportedContentType: .png) { item in let fileURL = FileManager.default.temporaryDirectory .appendingPathComponent(item.fileName) .appendingPathExtension("png") guard let data = item.image.pngData() else { throw NSError(domain: "ImageEncodingError", code: 0) } try data.write(to: fileURL) return SentTransferredFile(fileURL) } } } `
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Gesture & SimultaneousGesture interfere with ScrollView behaviour.
I have faced a problem while I was trying to implement a reorder drag & drop view. I found that when I add any kind of .gesture or .simultaneousGesture, a ScrollView's scrolling behavior wasn't working properly (does not scroll at all). ScrollView(.vertical, showsIndicators: false) { ForEach($items) { $item in EditorCard(stepDetails: item) .simultaneousGesture( customCombinedGesture(item) ) } } This ScrollView worked fine with .onLongPressGesture(), however, I wanted to use custom gestures sequences.
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macOS 26: NSTokenField crashes due to NSGenericException caused by too many Update Constraints
This example application crashes when entering any text to the token field with FAULT: NSGenericException: The window has been marked as needing another Update Constraints in Window pass, but it has already had more Update Constraints in Window passes than there are views in the window. The app uses controlTextDidChange to update a live preview where it accesses the objectValue of the token field. If one character is entered, it also looks like the NSTokenFieldDelegate methods tokenField(_:styleForRepresentedObject:) tokenField(_:editingStringForRepresentedObject:) tokenField(_:representedObjectForEditing:) are called more than 10000 times until the example app crashes on macOS Tahoe 26 beta 6. I've reported this issue with beta 1 as FB18088608, but haven't heard back so far. I have multiple occurrences of this issue in my app, which is working fine on previous versions of macOS. I haven't found a workaround yet, and I’m getting anxious of this issue persisting into the official release.
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Cross-domain issue in wkwebview
Subject: Cross-Domain Access Behaviour in WKWebView – Clarification Required Description: We are facing a cross-domain issue in our iOS application where WKWebView loads content from one domain and attempts to access resources/data from another domain. Current Setup: App Platform: iOS WebView: WKWebView iOS Version: 26 Primary Domain: *.franconnectqa.net Data/Analytics Domain: analytics.franconnectdev.net SSL: Valid certificates configured ATS: Enabled Issue: When WKWebView loads content from franconnectqa.net, it attempts to access resources or analytics from analytics.franconnectdev.net, resulting in cross-domain restrictions. We would like to understand: Does WKWebView support cross-domain resource access by default? Are there any configuration settings that allow controlled cross-domain access? Are there known limitations regarding cookies, local storage, or session sharing across domains? Does WKWebView enforce additional restrictions beyond standard browser CORS policies? Are there recommended best practices for handling cross-domain scenarios in WKWebView? Expected Behavior: We want to determine whether: Cross-domain access is supported under certain configurations, OR The recommended approach is to align all resources under the same domain. Kindly provide guidance on the supported architecture and any configuration recommendations.
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Is there a way in AppKit to apply the Liquid Glass soft edge effect to a view placed outside an NSScrollView?
I’m developing a text editor that provides a line number view. This view is placed next to the NSScrollView that contains the main text view, rather than inside the scroll view. The line number view updates its drawing in sync with the NSScrollView’s scrolling and text editing in the NSTextView, so it can display the correct line numbers. This approach worked fine through macOS 15, but on macOS 26 with Liquid Glass, the line numbers end up being drawn without the expected blur/soft edge effect under the window toolbar area. In AppKit, some view controllers provide APIs to switch edge effects between soft/hard, but I can’t find any API to control this for the window toolbar region. I considered simply not drawing the numbers outside the content area, but if possible I’d like to apply the Tahoe-style soft edge effect instead. Does anyone have ideas? Is this currently impossible, meaning the only option is to file a feedback/API request? Also, for various reasons, the traditional approach of implementing line numbers by subclassing NSRulerView is difficult for my app.
Topic: UI Frameworks SubTopic: AppKit
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iOS 26: default gray background on UITabBarItem
In iOS 26, when a UITabBarItem is selected, a gray background appears behind the selected item. This seems to happen automatically with the new tab bar design. I tried configuring the tab bar using UITabBarAppearance, but the background highlight still appears. Is this the expected behavior in iOS 26 or is there a recommended way to configure the tab bar so that only the icon and title change color when selected?
Topic: UI Frameworks SubTopic: UIKit
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310
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Crash in SwiftUICore SDFStyle.distanceRange.getter
I've been receiving crash reports about a crash in SDFStyle.distanceRange.getter. I haven't been able to reproduce this, and users haven't given me much information about the circumstances or can't reliably reproduce this either. Googling didn't give any results. I'm happy for any pointers in the right direction. All reports have been on iOS 26 so far. 2026-03-02_23-35-03.7381_+0800-93830d0f537cfb381b42a7e9812953d772adfe64.crash
Topic: UI Frameworks SubTopic: SwiftUI
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TextKit 2 + SwiftUI (NSViewRepresentable): NSTextLayoutManager rendering attributes don’t reliably draw/update
I’m embedding an NSTextView (TextKit 2) inside a SwiftUI app using NSViewRepresentable. I’m trying to highlight dynamic subranges (changing as the user types) by providing per-range rendering attributes via NSTextLayoutManager’s rendering-attributes mechanism. The issue: the highlight is unreliable. Often, the highlight doesn’t appear at all even though the delegate/data source is returning attributes for the expected range. Sometimes it appears once, but then it stops updating even when the underlying “highlight range” changes. This feels related to SwiftUI - AppKit layout issue when using NSViewRepresentable (as said in https://developer.apple.com/documentation/swiftui/nsviewrepresentable). What I’ve tried Updating the state that drives the highlight range and invalidating layout fragments / asking for relayout Ensuring all updates happen on the main thread. Calling setNeedsDisplay(_:) on the NSViewRepresentable’s underlying view. Toggling the SwiftUI view identity (e.g. .id(...)) to force reconstruction (works, but too expensive / loses state). Question In a SwiftUI + NSViewRepresentable setup with TextKit 2, what is the correct way to make NSTextLayoutManager re-query and redraw rendering attributes when my highlight ranges change? Is there a recommended invalidation call for TextKit 2 to trigger re-rendering of rendering attributes? Or is this a known limitation when hosting NSTextView inside SwiftUI, where rendering attributes aren’t reliably invalidated? If this approach is fragile, is there a better pattern for dynamic highlights that avoids mutating the attributed string (to prevent layout/scroll jitter)?
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Switching to custom keyboard size glitches
I've created a custom keyboard and implemented the: class KeyboardViewController: UIInputViewController The imlementation looks like this: override func viewDidLoad() { super.viewDidLoad() var stack = UIStackView() stack.axis = .vertical stack.spacing = 8 stack.translatesAutoresizingMaskIntoConstraints = false stack.distribution = .fill stack.heightAnchor.constraint(equalToConstant: 200).isActive = true .... view.addSubview(stack) NSLayoutConstraint.activate([ stack.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20), stack.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20), stack.topAnchor.constraint(equalTo: view.topAnchor, constant: 10), stack.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -10) ]) The problem is that the keyboard seems to start showing in the size (I've printed the parent frame): Optional(<UIView: 0x101008480; frame = (0 0; 390 844); autoresize = W+H; layer = <CALayer: 0x600000207b80>>) and than resizes to my given height. But it's not fast enough so that I can see some glitches whenever I switch from another keyboard to my custom keyboard. Is there a way to prevent this resizing or start the keyboard in a given size? This is just not the best user experience.
Topic: UI Frameworks SubTopic: UIKit
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How do you disable split view tracking separators in macOS 26 Tahoe?
In the attached screenshot, we have an NSSplitViewController with three split view items. The first two are viewController split view items, while the third is an inspector split view item. The NSWindow is configured for full screen content so that the inspector split view items is full height itself. However, when we enable full height content view, AppKit is automatically adding a tracking separator into the toolbar when we don't want one. (Neither of the two split views are sidebars.) This tracking separator is out of place, cannot be dragged itself, and is drawn under the center aligned segmented control. We've tried a multitude of permutations to configure the NSWindow, NSToolbar and NSSplitViewItem but to no avail. Surely we're just missing the magic combo but a lot of the properties appear to be no-ops in macOS 26. How do we use an NSSplitViewController, in a full screen content window, such that we get a full height inspector but we don't get tracking separators for the main split view divider?
Topic: UI Frameworks SubTopic: AppKit Tags:
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Source view disappearing when interrupting a zoom navigation transition
When I use the .zoom transition in a navigation stack, I get a glitch when interrupting the animation by swiping back before it completes. When doing this, the source view disappears. I can still tap it to trigger the navigation again, but its not visible on screen. This seems to be a regression in iOS 26, as it works as expected when testing on iOS 18. Has someone else seen this issue and found a workaround? Is it possible to disable interrupting the transition? Filed a feedback on the issue FB19601591 Screen recording: https://share.icloud.com/photos/04cio3fEcbR6u64PAgxuS2CLQ Example code @State var showDetail = false @Namespace var namespace var body: some View { NavigationStack { ScrollView { showDetailButton } .navigationTitle("Title") .navigationBarTitleDisplayMode(.inline) .navigationDestination(isPresented: $showDetail) { Text("Detail") .navigationTransition(.zoom(sourceID: "zoom", in: namespace)) } } } var showDetailButton: some View { Button { showDetail = true } label: { Text("Show detail") .padding() .background(.green) .matchedTransitionSource(id: "zoom", in: namespace) } } }
Topic: UI Frameworks SubTopic: SwiftUI
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Incorrect menu consistency warnings logged in Tahoe for NSStatusItem, performance issues related?
Is anyone else getting new warning about menu items with submenus when running on Tahoe? I'm getting big performance problems using my menu as well as seeing these messages and I'm wondering if there's a connection. My app is faceless with a NSStatusItem with an NSMenu. Specifically it's my own subclass of NSMenu where I have a lot of code to manage the menu's dynamic behavior. This code is directly in the menu subclass instead of in a controller because the app I forked had it this way, a little wacky but I don't see it being a problem. A nib defines the contents of the menu, and it's instantiated manually with code like: var nibObjects: NSArray? = [] guard let nib = NSNib(nibNamed: "AppMenu", bundle: nil) else { ... } guard nib.instantiate(withOwner: owner, topLevelObjects: &nibObjects) else { ... } guard let menu = nibObjects?.compactMap({ $0 as? Self }).first else { ... } Within that nib.instantiate call I see a warning logged that seems new to Tahoe, before the menu's awakeFromNib is called, that says (edited): Internal inconsistency in menus - menu <NSMenu: 0x6000034e5340> believes it has <My_StatusItem_App.AppMenu: 0x7f9570c1a440> as a supermenu, but the supermenu does not seem to have any item with that submenu My_StatusItem_App.AppMenu: 0x7f9570c1a440 is my menu belonging to the NSStatusItem, NSMenu: 0x6000034e5340 is the submenu of one of its menu items. At a breakpoint in the NSMenu subclass's awakeFromNib I print self and see clear evidence of the warning's incorrectness. Below is a snippet of the console including the full warning, only edited for clarity and brevity. It shows on line 32 menu item with placeholder title "prototype batch item" that indeed has that submenu. Internal inconsistency in menus - menu <NSMenu: 0x6000034e5340> Title: Supermenu: 0x7f9570c1a440 (My StatusItem App), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( "<NSMenuItem: 0x6000010e4fa0 Do The Thing Again, ke mask='<none>'>", "<NSMenuItem: 0x6000010e5040 Customize\U2026, ke mask='<none>'>", "<NSMenuItem: 0x6000010e50e0, ke mask='<none>'>" ) believes it has <My_StatusItem_App.AppMenu: 0x7f9570c1a440> Title: My StatusItem App Supermenu: 0x0 (None), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( ) as a supermenu, but the supermenu does not seem to have any item with that submenu (lldb) po self <My_StatusItem_App.AppMenu: 0x7f9570c1a440> Title: My StatusItem App Supermenu: 0x0 (None), autoenable: YES Previous menu: 0x0 (None) Next menu: 0x0 (None) Items: ( "<NSMenuItem: 0x6000010fd7c0 About My StatusItem App\U2026, ke mask='<none>', action: showAbout:, action image: info.circle>", "<NSMenuItem: 0x6000010fd860 Show Onboarding Window\U2026, ke mask='Shift', action: showIntro:>", "<NSMenuItem: 0x6000010fd900 Update Available\U2026, ke mask='<none>', action: installUpdate:, standard image: icloud.and.arrow.down, hidden>", "<NSMenuItem: 0x6000010e46e0, ke mask='<none>'>", "<NSMenuItem: 0x6000010e4780 Start The Thing, ke mask='<none>', action: startTheThing:>", "<NSMenuItem: 0x6000010e4dc0 \U2318-\U232b key detector item, ke mask='<none>', view: <My_StatusItem_App.KeyDetectorView: 0x7f9570c1a010>>", "<NSMenuItem: 0x6000010e4e60, ke mask='<none>'>", "<NSMenuItem: 0x6000010e4f00 saved batches heading item, ke mask='<none>', view: <NSView: 0x7f9570b4be10>, hidden>", "<My_StatusItem_App.BatchMenuItem: 0x6000016e02c0 prototype batch item, ke mask='<none>', action: replaySavedBatch:, submenu: 0x6000034e5340 ()>", "<NSMenuItem: 0x6000010f7d40, ke mask='<none>'>", "<My_StatusItem_App.ClipMenuItem: 0x7f956ef14fd0 prototype copy clip item, ke mask='<none>', action: copyClip:>", "<NSMenuItem: 0x6000010fa620 Settings\U2026, ke='Command-,', action: showSettings:>", "<NSMenuItem: 0x6000010fa6c0, ke mask='<none>'>", "<NSMenuItem: 0x6000010fa760 Quit My StatusItem App, ke='Command-Q', action: quit:>" ) Is this seemingly incorrect inconsistency message harmless? Am I only grasping at straws to think it has some connection to the performance issues with this menu?
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3w
URLByResolvingAliasFileAtURL: Appears to Be Broken - resolves to the the wrong folder
So if I create an Alias of a folder in Finder and hand the alias to my app (I also moved the alias file to a new folder, but I did not move the original folder)...so then my app resolves the alias using: NSURL +URLByResolvingAliasFileAtURL: What happens? The resolved URL points to a completely different folder. Well not completely different. It resolves to a folder that happens to share same last path component as the original folder...but this folder is inside the same parent folder the alias file is in. It does not resolve to the original folder I created the alias of. So then once my app touches the alias with +URLByResolvingAliasFileAtURL: the alias now resolves to this new (wrong) location (even in Finder). Couple details: My app is not sandboxed. I have permission to access the original folder in my app (but even if I didn't the alias shouldn't be mutated just by merely resolving it). Only seems to happen if the folder I move the alias to happens to contain a sibling folder that has the same title as the original folder. Like it's just deleting the last path component of the alias and then appending the last path component of the original filename and just going with that. I hope that makes sense. I tried creating the alias myself using -bookmarkDataWithOptions: and going the other way (to Finder) but Finder must be resolving the alias using a different API because it resolves to the original location as expected.
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Question: How to support landscape-only on iPad app after 'Support for all orientations will soon be required' warning
Dear Apple Customer Support, I’m developing a new Swift iPadOS app and I want the app to run in landscape only (portrait disabled). In Xcode, under Target &gt; General &gt; Deployment Info &gt; Device Orientation, if I select only Landscape Left and Landscape Right, the app builds successfully, but during upload/validation I receive this message and the upload is blocked: “Update the Info.plist: Support for all orientations will soon be required.” Could you please advise what the correct/recommended way is to keep an iPad app locked to landscape only while complying with the current App Store upload requirements? Is there a specific Info.plist configuration (e.g., UISupportedInterfaceOrientations~ipad) or another setting that should be used? Thank you,
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547
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Emoji's not rendering in iOS 26.4 beta
I am testing my app in iOS 26.4 beta and emojis are rendering as squares with ? in the middle . I tested a very simple Text("👾") and I get the same results. It is working fine in 26.3.
Topic: UI Frameworks SubTopic: General
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153
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Putting 2 existing pdf pages side by side (half size) in a new pdf
In Swift, iOS, I have a pdf file. I want to take the pages 2 by 2 and put them side by side, on the new page. For this, I have to scale initial pages half size and rotate .pi/2. I managed to achieve this by converting pdf pages to UIImages and using a UIGraphicsImageRenderer. But with a critical loss of resolution. I've tried improving the resolution by creating images as jpegData(withCompressionQuality: 1.0), to no avail. So I would need to work directly on the pdf pages using CGPDFDocument format. The code structure is as follows, to insert a single scaled page: for iPage in … { if let _page = theCGPdfDocument.page(at: 1) { var _pageRect: CGRect = _page.getBoxRect(CGPDFBox.mediaBox) writeContextInDestination!.beginPage(mediaBox: &_pageRect) // translate to compensate for the flip caused displacement writeContextInDestination!.translateBy(x: _pageRect.size.width, y: _pageRect.size.height) Scale (-1, -1) // rotate 180° // add rotate as needed writeContextInDestination!.scaleBy(x: -1, y: -1) writeContextInDestination!.clip(to: _pageRect) writeContextInDestination!.drawPDFPage(_page) writeContextInDestination!.endPage() // end the current page } } writeContextInDestination!.closePDF() But I do not succeed in inserting the drawing of the second page. I've tried repeating lines 7 to 11 for a second page at line 13. No success. What is the direction to look for ?
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SwiftUI and undo
In my multiplatform SwiftUI document app, where should I implement undo? In the Views with Forms and Lists, Bindings, data classes or somewhere else? I am now implementing undo in Bindings and Lists, but I'm wondering if that's the right way to do it.
Topic: UI Frameworks SubTopic: SwiftUI
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Confirmation Items Regarding the Mandatory UIScene Lifecycle Support in iOS 27
After reviewing the following Apple Technote, I have confirmed the statement below: https://developer.apple.com/documentation/technotes/tn3187-migrating-to-the-uikit-scene-based-life-cycle In the next major release following iOS 26, UIScene lifecycle will be required when building with the latest SDK; otherwise, your app won’t launch. While supporting multiple scenes is encouraged, only adoption of scene life-cycle is required. Based on the above, I would appreciate it if you could confirm the following points: Is my understanding correct that the term “latest SDK” refers to Xcode 27? Is it correct that an app built with the latest SDK (Xcode 27, assuming the above understanding is correct) will not launch without adopting the UIScene lifecycle, with no exceptions? Is it correct that an app built with Xcode 26 without UIScene lifecycle support will still launch without issues on an iPhone updated to iOS 27?
Topic: UI Frameworks SubTopic: General Tags:
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