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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Automatic Sign-In API — requestAutoSignInAuthorization() - "Service temporarily unavailable"
When integrating the Automatic Sign-In API on physical devices (iPhone SE with iOS 26.0 and Apple TV with tvOS 26.0), the call to requestAutoSignInAuthorization() results in an immediate error stating "Service temporarily unavailable." This prevents the app from obtaining the necessary authorization context to proceed with token updates and the Automatic Sign-In flow. The issue occurs specifically at the authorization request stage and does not progress to calling updateAutoSignInToken(), since it does not acquire conditions for it. All entitlement and sandbox setup have been verified and are correctly configured. Error: Error Domain=VSErrorDomain Code=3 "The service is temporarily unavailable." UserInfo={NSLocalizedDescription=The service is temporarily unavailable., NSLocalizedRecoverySuggestion=Please try again later.}
Topic: UI Frameworks SubTopic: General
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367
Jul ’25
Change to safe area logic on iOS 26
I have a few view controllers in a large UIKit application that previously started showing content right below the bottom of the top navigation toolbar. When testing the same code on iOS 26, these same views have their content extend under the navigation bar and toolbar. I was able to fix it with: if #available(iOS 26, *, *) { self.edgesForExtendedLayout = [.bottom] } when running on iOS 26. I also fixed one or two places where the main view was anchored to self.view.topAnchor instead of self.view.safeAreaLayoutGuide.topAnchor. Although this seems to work, I wonder if this was an intended change in iOS 26 or just a temporary bug in the beta that will be resolved. Were changes made to the safe area and edgesForExtendedLayout logic in iOS 26? If so, is there a place I can see what the specific changes were, so I know my code is handling it properly? Thanks!
Topic: UI Frameworks SubTopic: UIKit
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1.6k
Nov ’25
iOS 26.1 PHPickerConfiguration.preselectedAssetIdentifiers doesn't select previous pictures in the PHPickerViewController
Hi, I faced with the issue on iOS 26.1 with PHPickerViewController. After first selection I save assetIdentifier of PHPickerResult for images. next time I open the picker I expect to have the images selected based on assetIdentifier Code: var config = PHPickerConfiguration(photoLibrary: .shared()) config.selectionLimit = 10 config.filter = .images config.preselectedAssetIdentifiers = images.compactMap(\.assetID) let picker = PHPickerViewController(configuration: config) picker.delegate = self present(picker, animated: true) But on iOS 26.1 they aren't selected. On lower iOS version all works fine. Does anybody faced with similar issue?
Topic: UI Frameworks SubTopic: UIKit
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626
Jan ’26
26.1b4 breaks zoom transition from tabViewBottomAccessory when fullScreenCover item is non-trivial Binding
Filed in Feedback as FB20772137 Zoom transition originating from inside tabViewBottomAccessory, when the binding passed to fullScreenCover's item is a Binding other than a "$-synthesized" binding, the animation fails with the following error (and crucially fails to perform the desired animation): Starting a zoom transition from a nil view will trigger a fallback transition. To get the best possible teansition, be sure to provide a view that's visible and in a window. What I want to do is pass a binding to a property inside an ObservableObject (or @Observable, but it doesn't matter) to hold the item representing the presentation. But this stopped working as of 26.1b4. It worked in 26.1b3 and in 26.0 (and 26.0.1) Here's the gist of code that will reproduce the issue (I've omitted irrelevant details in the interest of brevity): struct ContentView: View { @Binding var presentation: PresentationDestination? @Namespace private var animation var body: some View { // Omitted TabView stuff… .tabViewBottomAccessory { miniPlayer .matchedTransitionSource( id: "player", in: animation ) } .fullScreenCover( item: $presentation, content: { _ in fullScreenPlayer .navigationTransition( .zoom( sourceID: "player", in: animation ) ) }) } As you can see, ContentView takes a Binding to the presentation, but it matters how this binding is constructed. This works: @State private var presentation: PresentationDestination … ContentView(presentation: $presentation) This fails (as does ObservableObject with @Published): @Observable class Router2 { var presentation: PresentationDestination? } … @State private var router2 = Router2() … ContentView(presentation: $router2.presentation) Also, this fails: @State private var presentation: PresentationDestination … ContentView( presentation: .init(get: { presentation }, set: { newValue in presentation = newValue }) ) These differences are unexpected, of course. I consider this a regression in 26.1b4 I should add that if I move the source of the transition to somewhere outside tabViewBottomAccessory things seem to work fine.
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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357
Dec ’25
button is pressed when starting scrolling in iOS 18
On iOS 18, while on a modal screen, if the scrolling starts on a button, that button gets pressed, outside of a modal this doesn't reproduce, also not reproducible on older iOS versions, neither on modals or outside of them. The code to reproduce the issue: import SwiftUI struct ContentView: View { @State var presentModal = false var body: some View { Button(action: { presentModal = true }, label: { Text("open modal") }) .sheet(isPresented: $presentModal, content: { ScrollView { ForEach(0..<100, id: \.self) { index in Button(action: { print("Button \(index) tapped!") }) { Text("Button \(index)") .frame(maxWidth: .infinity) .frame(height: 100) .background(randomColor(for: index)) .padding(.horizontal) } } } }) } func randomColor(for index: Int) -> Color { let hue = Double(index % 100) / 100.0 return Color(hue: hue, saturation: 0.8, brightness: 0.8) } } #Preview { ContentView() }
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Jun ’25
Xcode 16 SwiftUI List Fast Scrolling Issue
Hi! When building my app using Xcode 16, fast scrolling (using scrollViewProxy.scrollTo) a list would result in items not appearing even when scrolling stopped. This does not happen when the app is built with Xcode 15, even on iOS 18. I'm also getting this error in the logs: List failed to visit cell content, returning an empty cell. - SwiftUICore/Logging.swift:84 - please file a bug report.
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1.4k
May ’25
StoreKit's manageSubscriptionsSheet view modifier not loading
Our app was just rejected by Apple because they say the subscription management sheet never loads. It just spins indefinitely. We're using StoreKit's manageSubscriptionsSheet view modifier to present the sheet, and it's always worked for us when testing in SandBox. Has anyone else had this problem? Given that it's Apple's own code that got us rejected, what's our path forward?
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1.5k
Nov ’25
iOS 26 Beta 3, UIGlassEffect corner radius
In beta 2 using layer.cornerRadius on a UIEffectView with the UIGlassEffect allowed you to change the corner radius of the view. In beta 3, this no longer works. WWDC videos indicate the right way to do this is to set the cornerConfiguration on the UIEffectView, but that API doesn't seem to be available yet. At this time it doesn't seem like theres a way to have a glass view that isn't pill shaped.
Topic: UI Frameworks SubTopic: UIKit Tags:
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606
Jul ’25
Replacement for deprecated CLPlacemark.region?
Hello, I use CLGeocoder to get the CLLocationCoordinate2D and CLRegion for an address. Now that this is deprecated in OS 26, I don't see a replacement for that property on MKMapItem via MKMapItemRequest and PlaceDescriptor. I've filed FB19027378 on this issue. Basically I have some addresses that have a street address, and others that just have a city. With CLGeocoder, when geocoding just the city, the CLRegion was set such that I could show my map zoomed out just right. I'm not sure how to do that now. Thanks!
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Jul ’25
iOS 26 regression: Slider does not respect step parameter
In iOS 26, the Slider control no longer respects the step parameter. For example, import SwiftUI struct ContentView: View { @State private var sliderValue: CGFloat = 16 var body: some View { Slider( value: $sliderValue, in: 0...100, step: 5, onEditingChanged: { editing in print(sliderValue) } ) } } In iOS 18, this prints values like 5, 35, 60, 95, etc. In iOS 26.0 (release version), this prints floats that are not rounded to the nearest 5, and the slider does not snap to values ending in 5. Feedback report number: FB20320542
Topic: UI Frameworks SubTopic: SwiftUI
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369
Nov ’25
App Clip iMessage Sharing Not Working
We have been having problems with our app clip not working when sharing through iMessage. The app and app clip are published and work correctly when scanning a QR code that points to the URL: https://www.coderus.com/locations?loc=1 however if this same URL is shared through the iMessage app, a link to the website displays and not the app clip card. We have confirmed that: AASA file is available and has the type application/json Both devices are above iOS 14 Both devices are in each other's contacts The website has the meta tag for the smart app clip banner The website has a meta tag for the og:image Launch experiences have been configured on AppStoreConnect - as said before, the QR codes work correctly The link leads to a 404 page, I wasn't sure if there needs to be an actual page that the link points to as app clips seem to work fine without when scanning the QR code through the camera app.
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1.3k
Mar ’25
iOS 26 UIKIt: Where's the missing cornerConfiguration property of UIViewEffectView?
In WWDC25 video 284: Build a UIKit app with the new design, there is mention of a cornerConfiguration property on UIVisualEffectView. But this properly isn't documented and Xcode 26 isn't aware of any such property. I'm trying to replicate the results of that video in the section titled Custom Elements starting at the 19:15 point. There is a lot of missing details and typos in the code associated with that video. My attempts with UIGlassEffect and UIViewEffectView do not result in any capsule shapes. I just get rectangles with no rounded corners at all. As an experiment, I am trying to recreate the capsule with the layers/location buttons in the iOS 26 version of the Maps app. I put the following code in a view controller's viewDidLoad method let imgCfgLayer = UIImage.SymbolConfiguration(hierarchicalColor: .systemGray) let imgLayer = UIImage(systemName: "square.2.layers.3d.fill", withConfiguration: imgCfgLayer) var cfgLayer = UIButton.Configuration.plain() cfgLayer.image = imgLayer let btnLayer = UIButton(configuration: cfgLayer, primaryAction: UIAction(handler: { _ in print("layer") })) var cfgLoc = UIButton.Configuration.plain() let imgLoc = UIImage(systemName: "location") cfgLoc.image = imgLoc let btnLoc = UIButton(configuration: cfgLoc, primaryAction: UIAction(handler: { _ in print("location") })) let bgEffect = UIGlassEffect() bgEffect.isInteractive = true let bg = UIVisualEffectView(effect: bgEffect) bg.contentView.addSubview(btnLayer) bg.contentView.addSubview(btnLoc) view.addSubview(bg) btnLayer.translatesAutoresizingMaskIntoConstraints = false btnLoc.translatesAutoresizingMaskIntoConstraints = false bg.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ btnLayer.leadingAnchor.constraint(equalTo: bg.contentView.leadingAnchor), btnLayer.trailingAnchor.constraint(equalTo: bg.contentView.trailingAnchor), btnLayer.topAnchor.constraint(equalTo: bg.contentView.topAnchor), btnLoc.centerXAnchor.constraint(equalTo: bg.contentView.centerXAnchor), btnLoc.topAnchor.constraint(equalTo: btnLayer.bottomAnchor, constant: 15), btnLoc.bottomAnchor.constraint(equalTo: bg.contentView.bottomAnchor), bg.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor), bg.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 40), ]) The result is pretty close other than the complete lack of capsule shape. What changes would be needed to get the capsule shape? Is this even the proper approach?
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Sep ’25
ios26 NumberPad keyboard issue on iPad
On an iPad running iOS26, there is an issue with the numberPad keyboard I have a UITextField with a keyboard type of .numberPad When I first tap in the field, a new number pad with just numbers (similar to the one that shows up on iPhone) shows up. When I tap again in the field, that number pad goes away. When I tap in the field again, the full keyboard with numbers etc shows up (this is the one that used to always show up pre-iOS26)
Topic: UI Frameworks SubTopic: UIKit
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Jan ’26
iOS 26 beta - Crash using QLPreviewController (QuickLook) in simulator.
Using the iOS 26 beta simulator, I am experiencing a crash using the QLPreviewController. This is easily reproduced using a small sample app and a sample excel file in the bundle. It does work in prior Xcode 16.4 and simulators (18.5). I didn't find any mention of this in Xcode 26 or iOS 26 release notes but I could have missed something. I don't have a spare device to update to iOS 26 and try on a real device so it may just be a simulator issue? Any feedback would be helpful. Thanks. Error: QuickLook/QLHostRemoteViewModel.swift:37: Fatal error: No extensions could be found matching '_AppExtensionQuery(extensionPointIdentifier: "com.apple.quicklook.UIExtensionPoint", predicate: nil, hostAuditToken: nil, extensionPoint: nil, allowsDuplicates: true)' Sample view controller... import UIKit import QuickLook class ViewController: UIViewController, QLPreviewControllerDataSource { var excelFileURL: URL! override func viewDidLoad() { super.viewDidLoad() // Load the Excel file (example: from bundle) if let url = Bundle.main.url(forResource: "file_example_XLSX_100", withExtension: "xlsx") { excelFileURL = url presentPreviewController() } } func presentPreviewController() { let previewController = QLPreviewController() previewController.dataSource = self present(previewController, animated: true, completion: nil) } // MARK: - QLPreviewControllerDataSource func numberOfPreviewItems(in controller: QLPreviewController) -> Int { return 1 } func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem { return excelFileURL as QLPreviewItem } }
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631
Jun ’25
AsyncRenderer causes crashes in ForEach when in Swift 6 language mode
Hi! We've recently done a big migration to Swift 6 language mode in our app and are now getting reports of crashes occurring due to closures in our SwiftUI code (most often the view builder in ForEach) not running on the main queue but instead running on the queue com.apple.SwiftUI.AsyncRenderer. One example of a call stack (ScheduleListView is our view that is in Swift 6 mode): Thread 16 #0 (null) in _dispatch_assert_queue_fail () #1 (null) in dispatch_assert_queue$V2.cold.1 () #2 (null) in dispatch_assert_queue () #3 (null) in swift_task_isCurrentExecutorWithFlagsImpl(swift::SerialExecutorRef, swift::swift_task_is_current_executor_flag) () #4 (null) in closure #2 in closure #1 in closure #1 in ScheduleListView.body.getter () #5 (null) in closure #1 in ForEachState.item(at:offset:) () #6 (null) in partial apply for closure #1 in ForEachState.item(at:offset:) () #8 (null) in partial apply for closure #1 in _withObservation<A>(do:) () .... (We have many other crashes with similar crash reports but in other views) Has anybody else run into something similar? Is there anything (other than simply reverting to Swift 5 mode again) that we can do to fix or at least reduce the amount of crashes? We're having a hard time finding anything out of the ordinary that we're doing in our views. Regards
Topic: UI Frameworks SubTopic: SwiftUI
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354
Oct ’25
UICollectionView Move Item Method Not Called in iOS 18
Summary In iOS 18, the UICollectionViewDelegate method collectionView(_:targetIndexPathForMoveOfItemFromOriginalIndexPath:atCurrentIndexPath:toProposedIndexPath:) is not being called when moving items in a UICollectionView. This method works as expected in iOS 17.5 and earlier versions. Steps to Reproduce Create a UICollectionView with drag and drop enabled. Implement the UICollectionViewDelegate method: func collectionView(_ collectionView: UICollectionView, targetIndexPathForMoveOfItemFromOriginalIndexPath originalIndexPath: IndexPath, atCurrentIndexPath currentIndexPath: IndexPath, toProposedIndexPath proposedIndexPath: IndexPath) -> IndexPath { print("🐸 Move") return proposedIndexPath } Run the app on iOS 18. Attempt to drag and drop items within the collection view. Expected Behavior The method should be called during the drag and drop operation, and "🐸 Move" should be printed to the console. Actual Behavior The method is not called, and nothing is printed to the console. The drag and drop operation still occurs, but without invoking this delegate method. Configuration iOS Version: 18 Xcode Version: Xcode 16.0.0
Topic: UI Frameworks SubTopic: UIKit Tags:
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712
Nov ’25
Unable to apply tinted glass effect to toolbar buttons in iOS 26
I'm trying to apply a tinted glass effect to toolbar buttons in iOS 26, similar to what was shown in the WWDC25 videos, but none of the approaches I've tried produce the translucent tinted glass effect. My code structure: .toolbar { ToolbarItem(placement: .navigationBarTrailing) { TrailingToolbarContent( selectedTab: $selectedTab, showingAddBeneficiary: $showingAddBeneficiary ) } } private struct TrailingToolbarContent: View { @Binding var selectedTab: Int @Binding var showingAddBeneficiary: Bool @EnvironmentObject private var settingsViewModel: SettingsViewModel var body: some View { switch selectedTab { case 1: if #available(iOS 26.0, *) { Button(action: { showingAddBeneficiary = true }) { Image(systemName: "plus") } // What I've tried: // .tint(Color("accentPrimary")) // Only changes icon color // .glassEffect(.regular.tint(Color("accentPrimary"))) // No effect // .buttonStyle(.glass).tint(Color("accentPrimary")) // No tint, but orange background // .buttonStyle(.borderedProminent).tint(Color("accentPrimary")) // Works but seems opaque, not glass } // ... other cases } } } What's the correct way to achieve tinted glass effects on toolbar buttons?
Topic: UI Frameworks SubTopic: SwiftUI
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205
Jul ’25
Popping sound when running XCode simulator
Hello, im getting popping / crackling sounds from my Macbook Pro (M4 2024) speakers. This happens when you do many certain tasks like click buttons or toggling switches when xcode has a simulator open and any background audio is playing, like spotify. The speakers go crazy especially when starting the simulator in xcode with music in background. Ive tried: Using blackhole, and changing audio output in the simulator app Deleting both .plist files form preferences file. "coreaudiod" trick in terminal restarting many times different xcode versions and simulators and swift files Nothing has worked. Any help?
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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245
Jun ’25
Is this log noise? "CoreSVG: Error: NULL ref passed to getObjectCoreSVG: Error: NULL ref passed to getObject"
Before I waste time creating an Apple Developer Support ticket, I’m hoping an Apple DTS engineer can confirm if this is just log noise. Here’s the code: import SwiftUI struct ContentView: View { @State private var editMode: EditMode = .inactive @State private var items = ["Item 1", "Item 2", "Item 3"] var body: some View { NavigationStack { List { ForEach(items, id: \.self) { item in Text(item) } .onDelete { indexSet in items.remove(atOffsets: indexSet) } } .environment(\.editMode, $editMode) .toolbar { ToolbarItem(placement: .topBarTrailing) { EditButton() .environment(\.editMode, $editMode) } } } } } #Preview { ContentView() } When you run this code and tap Edit, you’ll initially get: CoreSVG has logged an error. Set environment variabe [sic] "CORESVG_VERBOSE" to learn more. After setting CORESVG_VERBOSE = YES, you’ll see: CoreSVG: Error: NULL ref passed to getObjectCoreSVG: Error: NULL ref passed to getObject This error only appears the first time Edit is tapped after a build and run. It won't happen again, even after force-quitting and reopening the app. The issue also only happens on iOS 18.0 and 18.1—I can’t reproduce it on iOS 17.5. Fortunately, it doesn’t seem to cause any negative side effects. Is this just log noise?
Topic: UI Frameworks SubTopic: SwiftUI
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1.7k
Apr ’25