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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Recently used applications on guardian phone - FamilyControls, DeviceActivityReport
For an iOS app that runs in both child and parent mode across iOS devices. On the child device, with Family Controls enabled using .child permissions via AuthorizationCenter.requestAuthorization(for: .child). Is any way to display a list of recently used apps by the child on the parent (guardian) device, in a privacy-preserving and Apple-compliant way?
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May ’25
SwiftUI Picker does cause unresponsive views
Using the native SwiftUI.Picker to set a @State which is then used to render different child views based on the selected state (using a switch-case inside body) seems to cause those child views to be unresponsive. The following code below is a replicates the issue. The solution I am currently using is to build my own custom Picker that relies on SwiftUI.Buttons to set the state. This works. enum PickerSelection: Hashable { case binding, ownState } struct MainApp: View { @State private var pickerSelection: PickerSelection? = nil @State private var isToggled: Bool = false var body: some View { VStack(alignment: .leading) { /// Changing `pickerSelection` via `SwiftUI.Picker` causes child views' toggles to be unresponsive. Picker("Picker", selection: $pickerSelection) { Text("No Option").tag(Optional<PickerSelection>(nil)) Text("Binding").tag(PickerSelection.binding) Text("Own state").tag(PickerSelection.ownState) } /// Changing `pickerSelection` via a custom `Button`-based picker works as expected. CustomPickerWithButtonBased(pickerSelection: $pickerSelection) switch pickerSelection { case .binding: ChildViewWithBinding(isToggled: $isToggled) case .ownState: ChildViewManagingOwnState() case .none: EmptyView() } Spacer() } .padding() } } struct ChildViewWithBinding: View { @Binding var isToggled: Bool var body: some View { Toggle("ChildViewWithBinding", isOn: $isToggled) } } struct ChildViewManagingOwnState: View { @State private var isToggled: Bool = false var body: some View { Toggle("ChildViewManagingOwnState", isOn: $isToggled) } } struct CustomPickerWithButtonBased: View { @Binding var pickerSelection: PickerSelection? var body: some View { HStack { Button { pickerSelection = .binding } label: { Text("Binding") } Button { pickerSelection = .ownState } label: { Text("OwnState") } } } } Am I missing something with Picker?
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May ’25
UITab text color in dark mode
When running my app in dark mode in iOS 26 beta 3 the text color for inactive tabs are dark while the icon is light. I have reported this as a bug (FB18744184) but wanted to check if someone have found a workaround for this issue? I didn't see it mentioned in the release notes.
Topic: UI Frameworks SubTopic: UIKit Tags:
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159
Jul ’25
App Name Display
For now, my app name length is more than 20 characters, so the iPhone app name displays without a space, and uses the range operator to ensure showing the rest in the next line. Is it possible to show space and name with 2 lines?
Topic: UI Frameworks SubTopic: General Tags:
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97
May ’25
Xcode 26 - New Swift 6.2 Concurrency Sendable Closure Problems
I'm running into a seemingly unsolvable compile problem with the new Xcode 26 and Swift 6.2. Here's the issue. I've got this code that was working before: NSAnimationContext.runAnimationGroup({(context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }, completionHandler: { self.endIgnoreFrameChangeEvents() }) It's very simple. The clipView is a scrollView.contentView, and "animated" is a bool, and p is an NSPoint It captures those things, scrolls the clip view (animating if needed) to the point, and then calls a method in self to signal that the animation has completed. I'm getting this error: Call to main actor-isolated instance method 'endIgnoreFrameChangeEvents()' in a synchronous nonisolated context So, I don't understand why so many of my callbacks are getting this error now, when they worked before, but it is easy to solve. There's also an async variation of runAnimationGroup. So let's use that instead: Task { await NSAnimationContext.runAnimationGroup({(context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } So, when I do this, then I get a new error. Now it doesn't like the first enclosure. Which it was perfectly happy with before. Here's the error: Sending value of non-Sendable type '(NSAnimationContext) -&gt; Void' risks causing data races Here are the various overloaded definitions of runAnimationGroup: open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void, completionHandler: (@Sendable () -&gt; Void)? = nil) @available(macOS 10.7, *) open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void) async @available(macOS 10.12, *) open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void) The middle one is the one that I'm trying to use. The closure in this overload isn't marked sendable. But, lets try making it sendable now to appease the compiler, since that seems to be what the error is asking for: Task { await NSAnimationContext.runAnimationGroup({ @Sendable (context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } So now I get errors in the closure itself. There are 2 errors, only one of which is easy to get rid of. Call to main actor-isolated instance method 'animator()' in a synchronous nonisolated context Call to main actor-isolated instance method 'setBoundsOrigin' in a synchronous nonisolated context So I can get rid of that first error by capturing clipView.animator() outside of the closure and capturing the animator. But the second error, calling setBoundsOrigin(p) - I can't move that outside of the closure, because that is the thing I am animating! Further, any property you're going to me animating in runAnimationGroup is going to be isolated to the main actor. So now my code looks like this, and I'm stuck with this last error I can't eliminate: let animator = clipView.animator() Task { await NSAnimationContext.runAnimationGroup({ @Sendable (context) -&gt; Void in context.duration = animated ? 0.5 : 0 animator.setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } Call to main actor-isolated instance method 'setBoundsOrigin' in a synchronous nonisolated context There's something that I am not understanding here that has changed about how it is treating closures. This whole thing is running synchronously on the main thread anyway, isn't it? It's being called from a MainActor context in one of my NSViews. I would expect the closure in runAnimationGroup would need to be isolated to the main actor, anyway, since any animatable property is going to be marked MainActor. How do I accomplish what I am trying to do here? One last note: There were some new settings introduced at WWDC that supposedly make this stuff simpler - "Approchable Concurrency". In this example, I didn't have that turned on. Turning it on and setting the default to MainActor does not seem to have solved this problem. (All it does is cause hundreds of new concurrency errors in other parts of my code that weren't there before!) This is the last new error in my code (without those settings), but I can't see any way around this one. It's basically the same error as the others I was getting (in the callback closures), except with those I could eliminate the closures by changing APIs.
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Jun ’25
Map Switcher MapKit iOS 14 and up
Hello everyone, I have just started coding using swift and I´m currently building an app that ist using MapKit. It is required to run on iOS 14 and newer and I want to add a Map switcher to switch between the Map Views Standard, Satellite, Hybrid and eventually also OSM. However this apparently is not as straight forward as it seems and I just don't get it to work. I had multiple attempts such as these two, each interface with a separate MapSwitcherView that open on the press of a button: var body: some View { ZStack(alignment: .bottomTrailing) { Group { if selectedMapStyle == .openStreetMap { openStreetMapView() } else { MapContainer(region: $locationManager.region, tracking: $tracking, style: selectedMapStyle) } } .id(selectedMapStyle) .onChange(of: selectedMapStyle) { newStyle in print("Style changed to: (newStyle)") } and Group { switch selectedMapStyle { case .standard: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("standard") case .satellite: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("satellite") case .hybrid: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("hybrid") case .openStreetMap: openStreetMapView() } } Unfortunately the map just doesn't switch. Do you have any suggestions? Should I post some more code of the MapSwitcher or something? Thanks and best regards
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Jun ’25
Cannot publish iMessage app under sticker category
I have a LIVE imessage sticker app with simple UI that is auto installed under the sticker section. And i am trying to rewrite the app but the new app, when testing, always publish under the imessage app category instead of under the sticker category. here is the live app on app store: https://apps.apple.com/us/app/qoobee-agapi-stickers/id1176590163 Does anyone know how to get my imessage app published under the sticker category?
Topic: UI Frameworks SubTopic: SwiftUI
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Jun ’25
How can I build a custom `PickerStyle` in SwiftUI?
I am trying to create a radio group picker in SwiftUI, similar to this: https://www.neobrutalism.dev/docs/radio-group I already have a working view based version here: https://github.com/rational-kunal/NeoBrutalism/blob/main/Sources/NeoBrutalism/Components/Radio/Radio.swift Now I want to replace it with a more concise/swifty way of Picker with PickerStyle API: However, I can't find any official documentation or examples showing how to implement PickerStyle. Is it possible to create my own PickerStyle? If not, what’s the recommended alternative to achieve a radio‑group look while still using Picker? struct NBRadioGroupPickerStyle: PickerStyle { static func _makeView<SelectionValue>(value: _GraphValue<_PickerValue<NBRadioGroupPickerStyle, SelectionValue>>, inputs: _ViewInputs) -> _ViewOutputs where SelectionValue : Hashable { <#code#> } static func _makeViewList<SelectionValue>(value: _GraphValue<_PickerValue<NBRadioGroupPickerStyle, SelectionValue>>, inputs: _ViewListInputs) -> _ViewListOutputs where SelectionValue : Hashable { <#code#> } } Crossposting: https://forums.swift.org/t/how-can-i-build-a-custom-pickerstyle-in-swiftui/80755
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Jun ’25
ssue with Session Sharing Between Safari and ASWebAuthenticationSession
We are experiencing an issue with session sharing on iOS and would appreciate your guidance. We operate and control our own OpenID Connect (OIDC) server. Our iOS application uses ASWebAuthenticationSession to authenticate users. We're unable to get the authentication session to be shared between the Safari app and the app's ASWebAuthenticationSession. This results in users having to re-authenticate despite being logged in via Safari. We've attempted various configurations related to cookie SameSite settings. These adjustments resolved the session sharing issue on Android using Chrome Custom Tabs. However, no changes we've tried have enabled session sharing to work as expected on iOS. According to documentation from Apple, Microsoft, Okta, and Auth0, session sharing between Safari and ASWebAuthenticationSession should work. Question: Are there any additional settings, configurations, or platform limitations we should be aware of that could impact session sharing on iOS? Where else can we look to resolve this issue?
Topic: UI Frameworks SubTopic: General
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May ’25
Changes to CarPlay maps Application scene
I am looking at the demo code for CarPlay Maps app - https://developer.apple.com/documentation/carplay/integrating-carplay-with-your-navigation-app This worked in IOS 18 but now on IOS26 it doesn't work, eg the map in the CarPlay app no longer shows up. I don't see any docks to say what has changed, I wonder if anyone has any ideas?
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Jun ’25
iOS: Dictation case change with custom keyboard
I implement a custom keyboard extension. On modern iPhones the dictation button will display in the lower right even when a custom keyboard is active. If you are in an empty text field with the sentence capitalization trait turned on (e.g., Messages), press the Mic button, and dictate something, it will appear with the first word capitalized. As it should. But when you hit the Mic button again to accept the result, the first word is suddenly changed to uncapitalized. With the system keyboard this final case change does not occur. Why? How to prevent this? More technical detail: I receive UITextInputDelegate-textWillChange and UITextInputDelegate-textDidChange events during dictation (always with the textInput parameter set to nil) and then a final textDidChange with the lowercased text when accepting at the end.
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Jul ’25
How do I maintain different navigation selections on a per-scene basis in SwiftUI?
I’ll preface this by saying I’ve submitted a DTS ticket with essentially this exact text, but I thought I’d also post about it here to get some additional input. Apple engineers: the case ID is 14698374, for your reference. I have an observable class, called NavigationModel, that powers navigation in my SwiftUI app. It has one important property, navigationSelection, that stores the currently selected view. This property is passed to a List in the sidebar column of a NavigationSplitView with two columns. The list has NavigationLinks that accept that selection as a value parameter. When a NavigationLink is tapped, the detail column shows the appropriate detail view per the navigationSelection property’s current value via a switch statement. (This navigationSelection stores an enum value.) This setup allows for complete programmatic navigation as that selection is effectively global. From anywhere in the app — any button, command, or app intent — the selection can be modified since the NavigationModel class uses the @Observable Swift macro. In the app’s root file, an instance of the NavigationModel is created, added as an app intent dependency, and assigned (might be the wrong verb here, but you get it) to ContentView, which houses the NavigationSplitView code. The problem lies when more than one window is opened. Because this is all just one instance of NavigationModel — initialized in the app’s root file — the navigation selection is shared across windows. That is, there is no way for one window to show a view and another to show another view — they’re bound to the same instance of NavigationModel. Again, this was done so that app intents and menu bar commands can modify the navigation selection, but this causes unintended behavior. I checked Apple’s sample projects, namely the “Accelerating app interactions with App Intents” (https://developer.apple.com/documentation/appintents/acceleratingappinteractionswithappintents) and “Adopting App Intents to support system experiences” (https://developer.apple.com/documentation/appintents/adopting-app-intents-to-support-system-experiences) projects, to see how Apple recommends handling this case. Both of these projects have intents to display a view by modifying the navigation selection. They also have the same unintended behavior I’m experiencing in my app. If two windows are open, they share the navigation selection. I feel pretty stupid asking for help with this, but I’ve tried a lot to get it to work the way I want it to. My first instinct was to create a new instance of NavigationModel for each window, and that’s about 90% of the way there, but app intents fail when there are no open windows because there are no instances of NavigationModel to modify. I also tried playing with FocusedValue and SceneStorage, but those solutions also didn’t play well with app intents and added too much convoluted code for what should be a simple issue. In total, what I want is: A window/scene-specific navigation selection property that works across TabViews and NavigationSplitViews A way to reliably modify that property’s value across the app for the currently focused window A way to set a value as a default, so when the app launches with a window, it automatically selects a value in the detail column The navigation selection to reset across app and window launches, restoring the default selection Does anyone know how to do this? I’ve scoured the internet, but again, no dice. Usually Apple’s sample projects are great with this sort of thing, but all of their projects that have scene-specific navigation selection with NavigationSplitView don’t have app intents. 🤷‍♂️ If anyone needs additional code samples, I’d be happy to provide them, but it’s basically a close copy of Apple’s own sample code found in those two links.
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Jul ’25
SwiftUI Transaction completion handler is being called unexpectedly
Unexpected SwiftUI Transaction Behavior This minimal example demonstrates an unexpected behavior in SwiftUI's Transaction API: var transaction = Transaction(animation: .none) transaction.addAnimationCompletion { print("This should not be called!") } The Issue The completion handler is called immediately after creation, even though the transaction was never used in any SwiftUI animation context (like withTransaction or other animation-related APIs). Expected vs Actual Behavior Expected: The completion handler should only be called after the transaction is actually used in a SwiftUI animation. Actual: The completion handler is called right after creation, regardless of whether the transaction is used or not. Current Workaround To avoid this, I'm forced to implement defensive programming: only creating transactions with completion handlers at the exact moment they're going to be used. This adds unnecessary complexity and goes against the intuitive usage of the Transactions API.
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Jun ’25
Crash with NSAttributedString in Core Data
I am trying out the new AttributedString binding with SwiftUI’s TextEditor in iOS26. I need to save this to a Core Data database. Core Data has no AttributedString type, so I set the type of the field to “Transformable”, give it a custom class of NSAttributedString, and set the transformer to NSSecureUnarchiveFromData When I try to save, I first convert the Swift AttributedString to NSAttributedString, and then save the context. Unfortunately I get this error when saving the context, and the save isn't persisted: CoreData: error: SQLCore dispatchRequest: exception handling request: <NSSQLSaveChangesRequestContext: 0x600003721140> , <shared NSSecureUnarchiveFromData transformer> threw while encoding a value. with userInfo of (null) Here's the code that tries to save the attributed string: struct AttributedDetailView: View { @ObservedObject var item: Item @State private var notesText = AttributedString() var body: some View { VStack { TextEditor(text: $notesText) .padding() .onChange(of: notesText) { item.attributedString = NSAttributedString(notesText) } } .onAppear { if let nsattributed = item.attributedString { notesText = AttributedString(nsattributed) } else { notesText = "" } } .task { item.attributedString = NSAttributedString(notesText) do { try item.managedObjectContext?.save() } catch { print("core data save error = \(error)") } } } }
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Jun ’25
iOS18.1以降でのアプリレイアウト崩れに関して
iOS18.0以前では発生していなかったアプリのレイアウト崩れが発生しており、これはOS起因のバグなのか否かをご教示いただきたいです。 【事象】 iOS18.0以前では発生していなかった、右上に表示していたアイコンが真ん中に来ているといったアプリのレイアウト崩れが発生しております。 【原因調査】 ソースを確認したところ、 親要素のCSS内にあるui-btn-textのdisplayが、上記事象が発生しているOS(現在で確認できているのは18.4.1と18.5)だと 「display: block」もしくは「display: inline-block」となっていない場合横幅がない状態として判定されています。 その為「position:absolute」かつ、「right: XXpx」という指定を行った場合、iOS18.0以前では親要素の右端から「XXpx」ずれた位置に配置される形となりますが、事象が発生しているOSでは(横幅が0として判定されるため)親要素の左端から「XXpx」ずれた位置に配置される形となっております。 【質問】 これはOS起因のバグなのか仕様変更なのか確認いただきたいです。
Topic: UI Frameworks SubTopic: General
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Jun ’25
Detect when tab bar minimizes (.tabBarMinimizeBehavior)
Hi! I'm working on a iOS 26 SwiftUI prototype that adds an element to the content of a screen only when the tab bar is fully visible and not minimized (via .tabBarMinimizeBehavior). Is there any way to detect when a tab bar is minimized? My hope is that I can use a ternary operator to display something only when a boolean is true. Here's some code to illustrate my idea: struct ContentView: View { @State var isTabBarMinimized: Bool = false var body: some View { TabView { Tab("View1", systemImage: "rainbow") { // Only appears when tab bar is fully visible Color.blue .opacity(isTabBarMinimized? 0 : 1 ) } Tab("View2", systemImage: "rainbow") { View2() } Tab("View3", systemImage: "rainbow") { View3() } Tab("View4", systemImage: "rainbow") { View4() } } .tabBarMinimizeBehavior(.onScrollDown) } }
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Jun ’25
ViewThatFits and Text Truncation
I'm using ViewThatFits to handle different screen sizes as well as the orientation of the phone. Essentially, I have a smaller view that should only be used in portrait mode on the phone and a larger view that should be used in every other instance. The issue is that both of those views have a Text view that is bound to a String within a SwiftData model. If the String is too long the ViewThatFits considers that when choosing the appropriate subview. This results in a list of items where most items use one view while one or more may use the other view. It would be great if there was a modifier that could be applied to the Text view that resulted in the ViewThatFits ignoring it when determining the appropriate subview. Until such a modifier is available, has anyone come up with creative ways around this?
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Jun ’25
Regarding ARKit camera feed zoom and macro support for closer object
I am currently developing an AR experience using ARKit with SceneKit and am looking to implement functionality that enables: Zooming into the AR camera feed, ideally leveraging the ultra-wide or telephoto lenses available on supported devices. Macro-style focus capabilities, allowing users to view and interact with virtual content closely aligned with small or nearby real-world objects (within a few centimeters). My objective is to ensure that ARKit continues to render the scene accurately while enabling a zoomed-in view or macro-level focus for better detail visibility and alignment. Could you please advise on: Whether ARKit currently supports camera zoom or allows access to macro or ultra-wide cameras within an ARSession. Limitations or considerations when using multi-camera setups in conjunction with ARKit. Any guidance or references to documentation or sample code would be greatly appreciated. Best regards, Ayush
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May ’25
Understanding how to make focusedImage work on CPMapButton
When my CPMapButton is selected/focused, I would like to be able to provide a focusedImage to correctly show the button when the blue focus is shown. Currently I have: What do I need to do to create an image that works more like the panning interface buttons?
Topic: UI Frameworks SubTopic: UIKit Tags:
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264
Activity
Jun ’25
Recently used applications on guardian phone - FamilyControls, DeviceActivityReport
For an iOS app that runs in both child and parent mode across iOS devices. On the child device, with Family Controls enabled using .child permissions via AuthorizationCenter.requestAuthorization(for: .child). Is any way to display a list of recently used apps by the child on the parent (guardian) device, in a privacy-preserving and Apple-compliant way?
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1
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182
Activity
May ’25
SwiftUI Picker does cause unresponsive views
Using the native SwiftUI.Picker to set a @State which is then used to render different child views based on the selected state (using a switch-case inside body) seems to cause those child views to be unresponsive. The following code below is a replicates the issue. The solution I am currently using is to build my own custom Picker that relies on SwiftUI.Buttons to set the state. This works. enum PickerSelection: Hashable { case binding, ownState } struct MainApp: View { @State private var pickerSelection: PickerSelection? = nil @State private var isToggled: Bool = false var body: some View { VStack(alignment: .leading) { /// Changing `pickerSelection` via `SwiftUI.Picker` causes child views' toggles to be unresponsive. Picker("Picker", selection: $pickerSelection) { Text("No Option").tag(Optional<PickerSelection>(nil)) Text("Binding").tag(PickerSelection.binding) Text("Own state").tag(PickerSelection.ownState) } /// Changing `pickerSelection` via a custom `Button`-based picker works as expected. CustomPickerWithButtonBased(pickerSelection: $pickerSelection) switch pickerSelection { case .binding: ChildViewWithBinding(isToggled: $isToggled) case .ownState: ChildViewManagingOwnState() case .none: EmptyView() } Spacer() } .padding() } } struct ChildViewWithBinding: View { @Binding var isToggled: Bool var body: some View { Toggle("ChildViewWithBinding", isOn: $isToggled) } } struct ChildViewManagingOwnState: View { @State private var isToggled: Bool = false var body: some View { Toggle("ChildViewManagingOwnState", isOn: $isToggled) } } struct CustomPickerWithButtonBased: View { @Binding var pickerSelection: PickerSelection? var body: some View { HStack { Button { pickerSelection = .binding } label: { Text("Binding") } Button { pickerSelection = .ownState } label: { Text("OwnState") } } } } Am I missing something with Picker?
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91
Activity
May ’25
UITab text color in dark mode
When running my app in dark mode in iOS 26 beta 3 the text color for inactive tabs are dark while the icon is light. I have reported this as a bug (FB18744184) but wanted to check if someone have found a workaround for this issue? I didn't see it mentioned in the release notes.
Topic: UI Frameworks SubTopic: UIKit Tags:
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1
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159
Activity
Jul ’25
Using Camera in ASWebAuthenticationSession
Is is possible to use the camera in ASWebAuthenticationSession? We want to support signing in with a QR Code in our custom OAuth flow but the browser can't seem to access the camera.
Topic: UI Frameworks SubTopic: General
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100
Activity
May ’25
App Name Display
For now, my app name length is more than 20 characters, so the iPhone app name displays without a space, and uses the range operator to ensure showing the rest in the next line. Is it possible to show space and name with 2 lines?
Topic: UI Frameworks SubTopic: General Tags:
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97
Activity
May ’25
Xcode 26 - New Swift 6.2 Concurrency Sendable Closure Problems
I'm running into a seemingly unsolvable compile problem with the new Xcode 26 and Swift 6.2. Here's the issue. I've got this code that was working before: NSAnimationContext.runAnimationGroup({(context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }, completionHandler: { self.endIgnoreFrameChangeEvents() }) It's very simple. The clipView is a scrollView.contentView, and "animated" is a bool, and p is an NSPoint It captures those things, scrolls the clip view (animating if needed) to the point, and then calls a method in self to signal that the animation has completed. I'm getting this error: Call to main actor-isolated instance method 'endIgnoreFrameChangeEvents()' in a synchronous nonisolated context So, I don't understand why so many of my callbacks are getting this error now, when they worked before, but it is easy to solve. There's also an async variation of runAnimationGroup. So let's use that instead: Task { await NSAnimationContext.runAnimationGroup({(context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } So, when I do this, then I get a new error. Now it doesn't like the first enclosure. Which it was perfectly happy with before. Here's the error: Sending value of non-Sendable type '(NSAnimationContext) -&gt; Void' risks causing data races Here are the various overloaded definitions of runAnimationGroup: open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void, completionHandler: (@Sendable () -&gt; Void)? = nil) @available(macOS 10.7, *) open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void) async @available(macOS 10.12, *) open class func runAnimationGroup(_ changes: (NSAnimationContext) -&gt; Void) The middle one is the one that I'm trying to use. The closure in this overload isn't marked sendable. But, lets try making it sendable now to appease the compiler, since that seems to be what the error is asking for: Task { await NSAnimationContext.runAnimationGroup({ @Sendable (context) -&gt; Void in context.duration = animated ? 0.5 : 0 clipView.animator().setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } So now I get errors in the closure itself. There are 2 errors, only one of which is easy to get rid of. Call to main actor-isolated instance method 'animator()' in a synchronous nonisolated context Call to main actor-isolated instance method 'setBoundsOrigin' in a synchronous nonisolated context So I can get rid of that first error by capturing clipView.animator() outside of the closure and capturing the animator. But the second error, calling setBoundsOrigin(p) - I can't move that outside of the closure, because that is the thing I am animating! Further, any property you're going to me animating in runAnimationGroup is going to be isolated to the main actor. So now my code looks like this, and I'm stuck with this last error I can't eliminate: let animator = clipView.animator() Task { await NSAnimationContext.runAnimationGroup({ @Sendable (context) -&gt; Void in context.duration = animated ? 0.5 : 0 animator.setBoundsOrigin(p) }) self.endIgnoreFrameChangeEvents() } Call to main actor-isolated instance method 'setBoundsOrigin' in a synchronous nonisolated context There's something that I am not understanding here that has changed about how it is treating closures. This whole thing is running synchronously on the main thread anyway, isn't it? It's being called from a MainActor context in one of my NSViews. I would expect the closure in runAnimationGroup would need to be isolated to the main actor, anyway, since any animatable property is going to be marked MainActor. How do I accomplish what I am trying to do here? One last note: There were some new settings introduced at WWDC that supposedly make this stuff simpler - "Approchable Concurrency". In this example, I didn't have that turned on. Turning it on and setting the default to MainActor does not seem to have solved this problem. (All it does is cause hundreds of new concurrency errors in other parts of my code that weren't there before!) This is the last new error in my code (without those settings), but I can't see any way around this one. It's basically the same error as the others I was getting (in the callback closures), except with those I could eliminate the closures by changing APIs.
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5
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552
Activity
Jun ’25
Map Switcher MapKit iOS 14 and up
Hello everyone, I have just started coding using swift and I´m currently building an app that ist using MapKit. It is required to run on iOS 14 and newer and I want to add a Map switcher to switch between the Map Views Standard, Satellite, Hybrid and eventually also OSM. However this apparently is not as straight forward as it seems and I just don't get it to work. I had multiple attempts such as these two, each interface with a separate MapSwitcherView that open on the press of a button: var body: some View { ZStack(alignment: .bottomTrailing) { Group { if selectedMapStyle == .openStreetMap { openStreetMapView() } else { MapContainer(region: $locationManager.region, tracking: $tracking, style: selectedMapStyle) } } .id(selectedMapStyle) .onChange(of: selectedMapStyle) { newStyle in print("Style changed to: (newStyle)") } and Group { switch selectedMapStyle { case .standard: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("standard") case .satellite: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("satellite") case .hybrid: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: $tracking) .id("hybrid") case .openStreetMap: openStreetMapView() } } Unfortunately the map just doesn't switch. Do you have any suggestions? Should I post some more code of the MapSwitcher or something? Thanks and best regards
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202
Activity
Jun ’25
Cannot publish iMessage app under sticker category
I have a LIVE imessage sticker app with simple UI that is auto installed under the sticker section. And i am trying to rewrite the app but the new app, when testing, always publish under the imessage app category instead of under the sticker category. here is the live app on app store: https://apps.apple.com/us/app/qoobee-agapi-stickers/id1176590163 Does anyone know how to get my imessage app published under the sticker category?
Topic: UI Frameworks SubTopic: SwiftUI
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67
Activity
Jun ’25
How can I build a custom `PickerStyle` in SwiftUI?
I am trying to create a radio group picker in SwiftUI, similar to this: https://www.neobrutalism.dev/docs/radio-group I already have a working view based version here: https://github.com/rational-kunal/NeoBrutalism/blob/main/Sources/NeoBrutalism/Components/Radio/Radio.swift Now I want to replace it with a more concise/swifty way of Picker with PickerStyle API: However, I can't find any official documentation or examples showing how to implement PickerStyle. Is it possible to create my own PickerStyle? If not, what’s the recommended alternative to achieve a radio‑group look while still using Picker? struct NBRadioGroupPickerStyle: PickerStyle { static func _makeView<SelectionValue>(value: _GraphValue<_PickerValue<NBRadioGroupPickerStyle, SelectionValue>>, inputs: _ViewInputs) -> _ViewOutputs where SelectionValue : Hashable { <#code#> } static func _makeViewList<SelectionValue>(value: _GraphValue<_PickerValue<NBRadioGroupPickerStyle, SelectionValue>>, inputs: _ViewListInputs) -> _ViewListOutputs where SelectionValue : Hashable { <#code#> } } Crossposting: https://forums.swift.org/t/how-can-i-build-a-custom-pickerstyle-in-swiftui/80755
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198
Activity
Jun ’25
ssue with Session Sharing Between Safari and ASWebAuthenticationSession
We are experiencing an issue with session sharing on iOS and would appreciate your guidance. We operate and control our own OpenID Connect (OIDC) server. Our iOS application uses ASWebAuthenticationSession to authenticate users. We're unable to get the authentication session to be shared between the Safari app and the app's ASWebAuthenticationSession. This results in users having to re-authenticate despite being logged in via Safari. We've attempted various configurations related to cookie SameSite settings. These adjustments resolved the session sharing issue on Android using Chrome Custom Tabs. However, no changes we've tried have enabled session sharing to work as expected on iOS. According to documentation from Apple, Microsoft, Okta, and Auth0, session sharing between Safari and ASWebAuthenticationSession should work. Question: Are there any additional settings, configurations, or platform limitations we should be aware of that could impact session sharing on iOS? Where else can we look to resolve this issue?
Topic: UI Frameworks SubTopic: General
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146
Activity
May ’25
Changes to CarPlay maps Application scene
I am looking at the demo code for CarPlay Maps app - https://developer.apple.com/documentation/carplay/integrating-carplay-with-your-navigation-app This worked in IOS 18 but now on IOS26 it doesn't work, eg the map in the CarPlay app no longer shows up. I don't see any docks to say what has changed, I wonder if anyone has any ideas?
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128
Activity
Jun ’25
iOS: Dictation case change with custom keyboard
I implement a custom keyboard extension. On modern iPhones the dictation button will display in the lower right even when a custom keyboard is active. If you are in an empty text field with the sentence capitalization trait turned on (e.g., Messages), press the Mic button, and dictate something, it will appear with the first word capitalized. As it should. But when you hit the Mic button again to accept the result, the first word is suddenly changed to uncapitalized. With the system keyboard this final case change does not occur. Why? How to prevent this? More technical detail: I receive UITextInputDelegate-textWillChange and UITextInputDelegate-textDidChange events during dictation (always with the textInput parameter set to nil) and then a final textDidChange with the lowercased text when accepting at the end.
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3
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285
Activity
Jul ’25
How do I maintain different navigation selections on a per-scene basis in SwiftUI?
I’ll preface this by saying I’ve submitted a DTS ticket with essentially this exact text, but I thought I’d also post about it here to get some additional input. Apple engineers: the case ID is 14698374, for your reference. I have an observable class, called NavigationModel, that powers navigation in my SwiftUI app. It has one important property, navigationSelection, that stores the currently selected view. This property is passed to a List in the sidebar column of a NavigationSplitView with two columns. The list has NavigationLinks that accept that selection as a value parameter. When a NavigationLink is tapped, the detail column shows the appropriate detail view per the navigationSelection property’s current value via a switch statement. (This navigationSelection stores an enum value.) This setup allows for complete programmatic navigation as that selection is effectively global. From anywhere in the app — any button, command, or app intent — the selection can be modified since the NavigationModel class uses the @Observable Swift macro. In the app’s root file, an instance of the NavigationModel is created, added as an app intent dependency, and assigned (might be the wrong verb here, but you get it) to ContentView, which houses the NavigationSplitView code. The problem lies when more than one window is opened. Because this is all just one instance of NavigationModel — initialized in the app’s root file — the navigation selection is shared across windows. That is, there is no way for one window to show a view and another to show another view — they’re bound to the same instance of NavigationModel. Again, this was done so that app intents and menu bar commands can modify the navigation selection, but this causes unintended behavior. I checked Apple’s sample projects, namely the “Accelerating app interactions with App Intents” (https://developer.apple.com/documentation/appintents/acceleratingappinteractionswithappintents) and “Adopting App Intents to support system experiences” (https://developer.apple.com/documentation/appintents/adopting-app-intents-to-support-system-experiences) projects, to see how Apple recommends handling this case. Both of these projects have intents to display a view by modifying the navigation selection. They also have the same unintended behavior I’m experiencing in my app. If two windows are open, they share the navigation selection. I feel pretty stupid asking for help with this, but I’ve tried a lot to get it to work the way I want it to. My first instinct was to create a new instance of NavigationModel for each window, and that’s about 90% of the way there, but app intents fail when there are no open windows because there are no instances of NavigationModel to modify. I also tried playing with FocusedValue and SceneStorage, but those solutions also didn’t play well with app intents and added too much convoluted code for what should be a simple issue. In total, what I want is: A window/scene-specific navigation selection property that works across TabViews and NavigationSplitViews A way to reliably modify that property’s value across the app for the currently focused window A way to set a value as a default, so when the app launches with a window, it automatically selects a value in the detail column The navigation selection to reset across app and window launches, restoring the default selection Does anyone know how to do this? I’ve scoured the internet, but again, no dice. Usually Apple’s sample projects are great with this sort of thing, but all of their projects that have scene-specific navigation selection with NavigationSplitView don’t have app intents. 🤷‍♂️ If anyone needs additional code samples, I’d be happy to provide them, but it’s basically a close copy of Apple’s own sample code found in those two links.
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176
Activity
Jul ’25
SwiftUI Transaction completion handler is being called unexpectedly
Unexpected SwiftUI Transaction Behavior This minimal example demonstrates an unexpected behavior in SwiftUI's Transaction API: var transaction = Transaction(animation: .none) transaction.addAnimationCompletion { print("This should not be called!") } The Issue The completion handler is called immediately after creation, even though the transaction was never used in any SwiftUI animation context (like withTransaction or other animation-related APIs). Expected vs Actual Behavior Expected: The completion handler should only be called after the transaction is actually used in a SwiftUI animation. Actual: The completion handler is called right after creation, regardless of whether the transaction is used or not. Current Workaround To avoid this, I'm forced to implement defensive programming: only creating transactions with completion handlers at the exact moment they're going to be used. This adds unnecessary complexity and goes against the intuitive usage of the Transactions API.
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151
Activity
Jun ’25
Crash with NSAttributedString in Core Data
I am trying out the new AttributedString binding with SwiftUI’s TextEditor in iOS26. I need to save this to a Core Data database. Core Data has no AttributedString type, so I set the type of the field to “Transformable”, give it a custom class of NSAttributedString, and set the transformer to NSSecureUnarchiveFromData When I try to save, I first convert the Swift AttributedString to NSAttributedString, and then save the context. Unfortunately I get this error when saving the context, and the save isn't persisted: CoreData: error: SQLCore dispatchRequest: exception handling request: <NSSQLSaveChangesRequestContext: 0x600003721140> , <shared NSSecureUnarchiveFromData transformer> threw while encoding a value. with userInfo of (null) Here's the code that tries to save the attributed string: struct AttributedDetailView: View { @ObservedObject var item: Item @State private var notesText = AttributedString() var body: some View { VStack { TextEditor(text: $notesText) .padding() .onChange(of: notesText) { item.attributedString = NSAttributedString(notesText) } } .onAppear { if let nsattributed = item.attributedString { notesText = AttributedString(nsattributed) } else { notesText = "" } } .task { item.attributedString = NSAttributedString(notesText) do { try item.managedObjectContext?.save() } catch { print("core data save error = \(error)") } } } }
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150
Activity
Jun ’25
iOS18.1以降でのアプリレイアウト崩れに関して
iOS18.0以前では発生していなかったアプリのレイアウト崩れが発生しており、これはOS起因のバグなのか否かをご教示いただきたいです。 【事象】 iOS18.0以前では発生していなかった、右上に表示していたアイコンが真ん中に来ているといったアプリのレイアウト崩れが発生しております。 【原因調査】 ソースを確認したところ、 親要素のCSS内にあるui-btn-textのdisplayが、上記事象が発生しているOS(現在で確認できているのは18.4.1と18.5)だと 「display: block」もしくは「display: inline-block」となっていない場合横幅がない状態として判定されています。 その為「position:absolute」かつ、「right: XXpx」という指定を行った場合、iOS18.0以前では親要素の右端から「XXpx」ずれた位置に配置される形となりますが、事象が発生しているOSでは(横幅が0として判定されるため)親要素の左端から「XXpx」ずれた位置に配置される形となっております。 【質問】 これはOS起因のバグなのか仕様変更なのか確認いただきたいです。
Topic: UI Frameworks SubTopic: General
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117
Activity
Jun ’25
Detect when tab bar minimizes (.tabBarMinimizeBehavior)
Hi! I'm working on a iOS 26 SwiftUI prototype that adds an element to the content of a screen only when the tab bar is fully visible and not minimized (via .tabBarMinimizeBehavior). Is there any way to detect when a tab bar is minimized? My hope is that I can use a ternary operator to display something only when a boolean is true. Here's some code to illustrate my idea: struct ContentView: View { @State var isTabBarMinimized: Bool = false var body: some View { TabView { Tab("View1", systemImage: "rainbow") { // Only appears when tab bar is fully visible Color.blue .opacity(isTabBarMinimized? 0 : 1 ) } Tab("View2", systemImage: "rainbow") { View2() } Tab("View3", systemImage: "rainbow") { View3() } Tab("View4", systemImage: "rainbow") { View4() } } .tabBarMinimizeBehavior(.onScrollDown) } }
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240
Activity
Jun ’25
ViewThatFits and Text Truncation
I'm using ViewThatFits to handle different screen sizes as well as the orientation of the phone. Essentially, I have a smaller view that should only be used in portrait mode on the phone and a larger view that should be used in every other instance. The issue is that both of those views have a Text view that is bound to a String within a SwiftData model. If the String is too long the ViewThatFits considers that when choosing the appropriate subview. This results in a list of items where most items use one view while one or more may use the other view. It would be great if there was a modifier that could be applied to the Text view that resulted in the ViewThatFits ignoring it when determining the appropriate subview. Until such a modifier is available, has anyone come up with creative ways around this?
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143
Activity
Jun ’25
Regarding ARKit camera feed zoom and macro support for closer object
I am currently developing an AR experience using ARKit with SceneKit and am looking to implement functionality that enables: Zooming into the AR camera feed, ideally leveraging the ultra-wide or telephoto lenses available on supported devices. Macro-style focus capabilities, allowing users to view and interact with virtual content closely aligned with small or nearby real-world objects (within a few centimeters). My objective is to ensure that ARKit continues to render the scene accurately while enabling a zoomed-in view or macro-level focus for better detail visibility and alignment. Could you please advise on: Whether ARKit currently supports camera zoom or allows access to macro or ultra-wide cameras within an ARSession. Limitations or considerations when using multi-camera setups in conjunction with ARKit. Any guidance or references to documentation or sample code would be greatly appreciated. Best regards, Ayush
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191
Activity
May ’25