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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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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Nov ’25
Infinite loop getting "_dismiss changed"
I'm working on a NavigationStack based app. Somewhere I'm using: @Environment(\.dismiss) private var dismiss and when trying to navigate to that view it gets stuck. I used Self._printChanges() and discovered the environment variable dismiss is changing repeatedly. Obviously I am not changing that variable explicitly. I wasn't able to reproduce this in a small project so far, but does anybody have any idea what kind of thing I could be doing that might be causing this issue? iOS 17.0.3
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Mar ’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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tvOS 18.0 Siri back button behavior bug
On testing my app with tvOS 18, I have noticed the Siri Remote back button no longer provides system-provided behavior when interacting with tab bar controller pages. Instead of moving focus back to the tab bar when pressed, the back button will close the app, as if the Home button was pressed. This occurs both on device and in the Simulator. Create tvOS project with a tab bar controller. Create pages/tabs which contain focusable items (ie. buttons) Scroll down to any focusable item (ie. a button or UICollectionView cell) Hit the Siri Remote back button. See expect behavior below: Expected behavior: System-provided behavior should move focus back to the tab bar at the top of the screen. Actual results: App is closed and user is taken back to the Home Screen. Has anyone else noticed this behavior?
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1.2k
Aug ’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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`onTapGesture` not triggered on `Map` views
When building with iOS 26 SDK beta 5 (23A5308f), onTapGesture is no longer being triggered on Map views. This appears to be a regression in beta 5 specifically, as this issue was not present in beta 4. How to reproduce Code The following code demonstrates the issue, as seen in the videos below. import MapKit import SwiftUI struct ContentView: View { @State private var location = CGPoint.zero var body: some View { Map() .onTapGesture { location in self.location = location } .safeAreaInset(edge: .bottom) { VStack(alignment: .center) { Text("iOS \(UIDevice.current.systemVersion)") .font(.largeTitle) Text("Tapped Location") Text("\(location.x), \(location.y)") } .frame(maxWidth: .infinity, alignment: .center) .background(.background) } } } Demo The gifs below show the behavior in iOS 18.5 (in which the tap gestures are recognized and tapped coordinate is displayed in the safe area inset) and iOS 26 beta 5 (in which the tap gestures have no effect): iOS 18 iOS 26 Next steps? Is there a recommended workaround for this issue?
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Sep ’25
Disabled button in SwiftUI .alert not working
I found an issue when implementing an alert with a TextField to input a name. I want the action button to be disabled until a name has been entered, but the action block is never executed when the button has become enabled and pressed. The problem seems to appear only when name is initially an empty string. Tested with iOS 17.0. struct MyView: View { @State private var name = "" var body: some View { SomeView() .alert(...) { TextField("Name", text: $name) Button("Action") { // Action }.disabled(name.isEmpty) Button("Cancel", role: .cancel) {} } } }
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Feb ’25
Keyboard Toolbar Padding iOS26
When I create a SwiftUI toolbar item with placement of .keyboard on iOS 26, the item appears directly on top of and in contact with the keyboard. This does not look good visually nor does it match the behavior seen in Apple's apps, such as Reminders. Adding padding to the contents of the toolbar item only expands the size of the item but does not separate the capsule background of the item from the keyboard. How can I add vertical padding or spacing to separate the toolbar item capsule from the keyboard?
Topic: UI Frameworks SubTopic: SwiftUI
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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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Jul ’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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May ’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
UIKit flip animation bugged in 26.1
Hello. I have an 12 year old app that still has some objective-c code in it. I have a place where i have a flip animation between 2 view controllers that looks like this: [UIView transitionFromView:origView toView:newViewController.view duration:0.5 options:UIViewAnimationOptionTransitionFlipFromRight completion:nil]; It has looked like this since 2012 at least. In our production release, it works prior to 26.1, but in 26.1 and 26.2, the flip is off-center and looks weird. it's like both edges flip the same way. It's a little bit hard to explain. If seen at least 2 other app store apps that i have installed behave this way too, from 26.1 and onwards. Anyone else seen this? Is there anything that can be done about it? Thankful for thoughts.
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iOS 26 & Xcode 26 - bug with keyboard by WebView
Environment iOS 26 (23A343) Xcode 26 Reproduces on device and Simulator Description When presenting a SwiftUI WebView (native iOS 26 component) or a WKWebView/UIWebView via UIViewRepresentable, focusing a text field inside the web view and then dismissing it breaks the keyboard layout behavior. After returning to the main app, tapping any TextField causes the keyboard to cover bottom controls (e.g. buttons). Expected safe area insets are not applied. The issue is only resolved after closing and reopening the keyboard once. Steps to Reproduce Open a SwiftUI screen with WebView (via .sheet or NavigationLink). Inside the web view, tap a text field to show the keyboard. Dismiss the web view. Tap a TextField in the main app. Expected Result Layout should adjust correctly. Bottom controls stay visible above the keyboard. Actual Result Keyboard covers bottom controls. Insets are ignored until the keyboard is dismissed and reopened. Notes Reproduces with: Native SwiftUI WebView (iOS 26) WKWebView and UIWebView via UIViewRepresentable Presentation style (.sheet or navigation push) does not matter. Example video: https://youtu.be/Epgoz1vETKU FB: FB20386257 Sample Code import SwiftUI import WebKit struct ContentView: View { @State var url: URL? @FocusState private var isFocused: Bool var body: some View { VStack { TextField("TextField", text: .constant("")) .focused($isFocused) Button("HIDE KEYBOARD") { isFocused = false } Spacer() Button("ACTION") { url = URL(string: "https://google.com") } } .sheet(item: $url) { value in NavigationStack { WebView(url: value) .toolbar { ToolbarItem(placement: .topBarLeading) { Button("CLOSE") { url = nil } } } } } } } extension URL: Identifiable { public var id: String { absoluteString } }
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Sep ’25
VisionOS NavigationStack background cannot be removed?
I have a simple example to demonstrate... struct MyView: View { var body: some View { Text("WOW") } } struct MyOtherView: View { var body: some View { NavigationStack { Text("WOW") } } } On VisionOS, MyOtherView has a glass background effect that cannot be disabled. glassBackgroundEffect(displayMode: .never) .background(.clear), .foregroundColor(.clear), none of them work. I then resorted to the SwiftUIIntrospect package to try set .clear on various child objects of the NavigationStack but nothing is working. I am in control of my own glass containers. I have a couple with space between them, but with the NavigationStack it sets a background behind both of them ruining the effect. This is what MyOtherView renders as: I'm looking for it to be completely transparent except the text. Like the below layout. For now I will have to roll my own navigation.
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Apr ’25
SwiftData on iOS 18 extreme memory use
Hi, I've run into two problems using SwiftData in iOS 18 that are total show-stoppers for my app, causing it to run out of memory and be killed by the system. The same app runs fine on iOS 17. The two problems are inter-related in a way I can't exactly diagnose, but are easy to reproduce. Problem #1: Calling .count on the array that represents a relationship or Query causes the whole array of objects to be loaded into memory. Problem #2: When a @Model object is loaded, properties that are declared with .externalStorage are loaded unnecessarily, and use tons of memory. It's possible that #1 is normal behavior, exacerbated by #2. I've written a test app that demonstrates the extreme difference in memory usage between the OS Versions. It uses a typical navigation pattern, with content counts on the left-side view. Each item has one thumbnail and one large image in .externalStorge. GitHub Source When populated with 80 items, each containing one thumbnail and one large image in .externalStorge, the app launches in 17.5 using 29mb of memory. On iOS 18, in the same conditions, 592 mb. When the first folder is selected, causing a list of thumbnails to load, iOS 17 uses just 86mb. iOS 18 uses 599mb, implying that all image data has already been loaded. So I'm asking for help from Apple or the Community in finding a workaround. I've been advised that finding a workaround may be necessary, as this may not be addressed in 18.0. Thanks in advance for any insight. Radars: FB14323833, FB14323934 (See attached images, or try it yourself) (You may notice in the 18.0 screenshots that the item counts don't add up right. That's yet another 18.0-SwiftData anomaly regarding relationships that I haven't tackled yet, but is also demonstrated by the sample app.)
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Feb ’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
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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Apr ’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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Nov ’25
dropDestination does not work inside List
I've discovered an issue with using iOS 16's Transferable drag-and-drop APIs for SwiftUI. The dropDestination modifier does not work when applied to a subview of a List. This code below will not work, unless you replace the List with a VStack or any other container (which, of course, removes all list-specific rendering). The draggable modifier will still work and the item will drag, but the dropDestination view won't react to it and neither closure will be called. struct MyView: View { var body: some View { List { Section { Text("drag this title") .font(.largeTitle) .draggable("a title") } Section { Color.pink .frame(width: 400, height: 400) .dropDestination(for: String.self) { receivedTitles, location in true } isTargeted: { print($0) } } } } } Has anyone encountered this bug and perhaps found a workaround?
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Apr ’25