hi does any one know if there changes in lifecycle in xcode 16 ios 18 cause i notice that my view will appear does what view didappear use to do in older version and it kind of a problem cause all the rest of ios work diffrently does anyone else found a problem with it? or does anyone know if there was a known change to life cycles

I found iPadOS18 displayed navigation bar incorrectly when transition from screen with hidden navigation bar to screen that show navigation bar. I have 2 ViewController: FirstViewController and SecondViewController. FirstViewController navigationBar set isHidden to be true (hidden) and SecondViewController navigationBar set isHidden to be false (showing). When transition from FirstViewController to SecondViewController, the navigation bar is displayed incorrectly as shown in picture below: Actual Expected Note I set hide navigation bar in viewWillAppear() in both ViewController override func viewWillAppear(_ animated: Bool) { navigationController?.setNavigationBarHidden(..., animated: true) } source code: https://github.com/ornthita/TestTabbar

I'm trying to test migration between schemas but I cannot get it to work properly. I've never been able to get a complex migration to work properly unfortunately. I've removed a property and added 2 new ones to one of my data models. This is my current plan. enum MigrationV1toV2: SchemaMigrationPlan { static var schemas: [any VersionedSchema.Type] { [SchemaV1.self, SchemaV2.self] } static let migrateV1toV2 = MigrationStage.custom( fromVersion: SchemaV1.self, toVersion: SchemaV2.self, willMigrate: { context in print("Inside will migrate") // Get old months let oldMonths = try context.fetch(FetchDescriptor<SchemaV1.Month>()) print("Number of old months:\(oldMonths.count)") for oldMonth in oldMonths { // Convert to new month let newMonth = Month(name: oldMonth.name, year: oldMonth.year, limit: oldMonth.limit) print("Number of transactions in oldMonth: \(oldMonth.transactions?.count)") print("Number of transactions in newMonth: \(newMonth.transactions?.count)") // Convert transactions for transaction in oldMonth.transactions ?? [] { // Set action and direction let action = getAction(from: transaction) let direction = getDirection(from: transaction) // Update category if necessary var category: TransactionCategory? = nil if let oldCategory = transaction.category { category = TransactionCategory( name: oldCategory.name, color: SchemaV2.Category.Colors.init(rawValue: oldCategory.color?.rawValue ?? "") ?? .blue, icon: getCategoryIcon(oldIcon: oldCategory.icon) ) // Remove old category context.delete(oldCategory) } // Create new let new = Transaction( date: transaction.date, action: action, direction: direction, amount: transaction.amount, note: transaction.note, category: category, month: newMonth ) // Remove old transaction from month oldMonth.transactions?.removeAll(where: { $0.id == transaction.id }) // Delete transaction from context context.delete(transaction) // Add new transaction to new month newMonth.transactions?.append(new) } // Remove old month context.delete(oldMonth) print("After looping through transactions and deleting old month") print("Number of transactions in oldMonth: \(oldMonth.transactions?.count)") print("Number of transactions in newMonth: \(newMonth.transactions?.count)") // Insert new month context.insert(newMonth) print("Inserted new month into context") } // Save try context.save() }, didMigrate: { context in print("In did migrate") let newMonths = try context.fetch(FetchDescriptor<SchemaV2.Month>()) print("Number of new months after migration: \(newMonths.count)") } ) static var stages: [MigrationStage] { [migrateV1toV2] } } It seems to run fine until it gets the the line: try context.save(). At this point it fails with the following line: SwiftData/PersistentModel.swift:726: Fatal error: What kind of backing data is this? SwiftData._KKMDBackingData<Monthly.SchemaV1.Transaction> Anyone know what I can do about this?

Question How can I suppress this prohibition mark during this operation? Background I am implementing drag-and-drop functionality in a UITableView to allow users to reorder cells. During the drag operation, when a cell is dragged back to its original position, a prohibition mark (🚫) appears over the cell. I have reviewed the API documentation for UITableViewDragDelegate and UITableViewDropDelegate, but I could not find any clear way to suppress this mark. The behavior does not impact functionality but is visually unappealing. What I Tried Customizing UITableViewDropProposal: I ensured that operation is set to .move and intent to .insertAtDestinationIndexPath. This did not resolve the issue. Customizing drag preview: Using dragPreviewParametersForRowAt to set a clear background. The prohibition mark still appeared. Verifying drop session: Checked the UIDropSession state in dropSessionDidUpdate to ensure valid drop handling. Environment Xcode Version: Version 16.2 Testing Device: iPhone 16 pro + iOS 18.2 Steps to Reproduce Code Example Create new app with this ViewController import UIKit class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITableViewDragDelegate, UITableViewDropDelegate { let tableView = UITableView() var items = ["Item 1", "Item 2", "Item 3", "Item 4"] override func viewDidLoad() { super.viewDidLoad() view.backgroundColor = .white tableView.delegate = self tableView.dataSource = self tableView.dragDelegate = self tableView.dropDelegate = self tableView.dragInteractionEnabled = true tableView.translatesAutoresizingMaskIntoConstraints = false tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell") tableView.separatorStyle = .none tableView.layer.cornerRadius = 10 tableView.backgroundColor = UIColor.systemGray6 view.addSubview(tableView) NSLayoutConstraint.activate([ tableView.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.5), tableView.centerXAnchor.constraint(equalTo: view.centerXAnchor), tableView.topAnchor.constraint(equalTo: view.topAnchor, constant: 50), tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -50) ]) } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return items.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) cell.textLabel?.text = items[indexPath.row] cell.textLabel?.textAlignment = .center cell.backgroundColor = UIColor.systemBlue.withAlphaComponent(0.2) cell.layer.cornerRadius = 10 cell.clipsToBounds = true return cell } func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { return 60 } func tableView(_ tableView: UITableView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] { let dragItem = UIDragItem(itemProvider: NSItemProvider(object: items[indexPath.row] as NSString)) dragItem.localObject = items[indexPath.row] return [dragItem] } func tableView(_ tableView: UITableView, dropSessionDidUpdate session: UIDropSession, withDestinationIndexPath destinationIndexPath: IndexPath?) -> UITableViewDropProposal { guard destinationIndexPath != nil else { return UITableViewDropProposal(operation: .cancel) } return UITableViewDropProposal(operation: .move, intent: .insertAtDestinationIndexPath) } func tableView(_ tableView: UITableView, performDropWith coordinator: UITableViewDropCoordinator) { guard let destinationIndexPath = coordinator.destinationIndexPath, let dragItem = coordinator.items.first?.dragItem.localObject as? String else { return } if let sourceIndex = items.firstIndex(of: dragItem) { tableView.performBatchUpdates { items.remove(at: sourceIndex) items.insert(dragItem, at: destinationIndexPath.row) tableView.moveRow(at: IndexPath(row: sourceIndex, section: 0), to: destinationIndexPath) } coordinator.drop(coordinator.items.first!.dragItem, toRowAt: destinationIndexPath) } } } Run simulator and start dragging a cell without moving it to a different position. Observe that a prohibition mark appears at the upper right of the cell Any guidance would be greatly appreciated. Thank you in advance!

Hi everyone, I've come across an issue on iOS that seems to affect many apps. Here's what happens: A user logs in with correct credentials and proceeds to the OTP verification screen as part of multi factor authentication. iOS presents the system password save prompt ("Would you like to save this password?"). Without selecting an option on this prompt, the user backgrounds the app (e.g., to check their email for the OTP). Upon returning to the app, the keyboard becomes completely inaccessible on the OTP screen or any other screen. From my testing, this behavior appears to be an OS-level bug, as it occurs consistently across various apps. Has anyone else encountered this? Any known workarounds or updates from Apple on this behavior would be greatly appreciated! Thanks!

I can't shake the "I don't think I did this correctly" feeling about a change I'm making for Image Playground support. When you create an image via an Image Playground sheet it returns a URL pointing to where the image is temporarily stored. Just like the Image Playground app I want the user to be able to decide to edit that image more. The Image Playground sheet lets you pass in a source URL for an image to start with, which is perfect because I could pass in the URL of that temp image. But the URL is NOT optional. So what do I populate it with when the user is starting from scratch? A friendly AI told me to use URL(string: "")! but that crashes when it gets forced unwrapped. URL(string: "about:blank")! seems to work in that it is ignored (and doesn't crash) when I have the user create the initial image (that shouldn't have a source image). This feels super clunky to me. Am I overlooking something?

I don't know why, but for my MacCatalyst target, I have to make my view controller Y orgin 36 and the subtract the view height by 36 points, or the view is clipped. The following works in my main UIViewController, but feels super hacky. I'd feel better if I understood the issue and addressed it properly. override func viewWillLayoutSubviews() { super.viewWillLayoutSubviews() #if targetEnvironment(macCatalyst) if view.frame.origin.y < 1 { let f = UIApplication.shared.sceneBounds let newFrame = CGRect(x: 0.0, y: 36, width: f.size.width, height: f.size.height - 36) self.view.frame = newFrame } #endif } My guess is it starts the view under the title bar, but I have these set in the view controller: self.extendedLayoutIncludesOpaqueBars = false self.edgesForExtendedLayout = []

Hi, I have a form on an iPad App I'm developing and the form have text field at its bottom when tapping on it the keyboard cover those text fields how to solve this issue leave a hug gap at bottom of the form so text field jump to top when keyboard shows ? Kind Regards

In iOS 18 widget, button is broken when it's has an accented desaturated image as content, the button's AppIntent will not trigger perform function. checkout the code below: ` struct WidgetExtEntryView : View { var entry: Provider.Entry var body: some View { VStack { Text("count:") Text("\(WidgetExtAppIntent.count)") HStack { // button can not be tapped Button(intent: WidgetExtAppIntent(action: "+1")) { VStack { Image(systemName: "plus.square.fill").resizable() .widgetAccentedRenderingMode(.accentedDesaturated) // <-- here .frame(width: 50, height: 50) Text("Broken") } }.tint(.red) // button can be tapped Button(intent: WidgetExtAppIntent(action: "+1")) { VStack { Image(systemName: "plus.square.fill").resizable() .widgetAccentedRenderingMode(.fullColor) // <-- here .frame(width: 50, height: 50) Text("OK").frame(width: 50, alignment: .center) } }.tint(.green) } .minimumScaleFactor(0.5) } } } ` check out the full demo project: ButtonInWidgetBrokenIOS18

I’m following the example code from Apple to implement the new iPadOS 18 TabView() with the new Tab(). While the tabbing itself is working fine, I can’t get it to show up a (large) navigation title in the sidebar (like the Home or Files app). I’ve tried placing .navigationTitle("App Name") at the TabView, but that doesn’t work. Is it possible to do this in any way or is this not recommended to show? TabView { Tab("Overview", systemImage: "film") { Text("Put a OverviewView here") } TabSection("Watch") { Tab("Movies", systemImage: "film") { Text("Put a MoviesView here") } Tab("TV Shows", systemImage: "tv") { Text("Put a TVShowsView here") } } TabSection("Listen") { Tab("Music", systemImage: "music.note.list") { Text("Put a MusicView here") } Tab("Podcasts", systemImage: "mic") { Text("Put a PodcastsView here") } } } .tabViewStyle(.sidebarAdaptable) .navigationTitle("App Name") .navigationBarTitleDisplayMode(.large) I know that there is also the .tabViewSidebarHeader() modifier, but that adds any view above the scroll view content. Neither does that easily allow to make it look like the regular navigation title, nor does it actually display in the navigation bar at the top, when scrolling down.

I have an app intent for interactive widgets. when I touch the toggle, the app intent perform to request location. func perform() async throws -> some IntentResult { var mark: LocationService.Placemark? do { mark = try await AsyncLocationServive.shared.requestLocation() print("[Widget] ConnectHandleIntent: \(mark)") } catch { WidgetHandler.shared.error = .locationUnauthorized print("[Widget] ConnectHandleIntent: \(WidgetHandler.shared.error!)") } return .result() } @available(iOSApplicationExtension 13.0, *) @available(iOS 13.0, *) final class AsyncLocationServive: NSObject, CLLocationManagerDelegate { static let shared = AsyncLocationServive() private let manager: CLLocationManager private let locationSubject: PassthroughSubject<Result<LocationService.Placemark, LocationService.Error>, Never> = .init() lazy var geocoder: CLGeocoder = { let geocoder = CLGeocoder() return geocoder }() @available(iOSApplicationExtension 14.0, *) @available(iOS 14.0, *) var isAuthorizedForWidgetUpdates: Bool { manager.isAuthorizedForWidgetUpdates } override init() { manager = CLLocationManager() super.init() manager.delegate = self } func requestLocation() async throws -> LocationService.Placemark { let result: Result<LocationService.Placemark, LocationService.Error> = try await withUnsafeThrowingContinuation { continuation in var cancellable: AnyCancellable? var didReceiveValue = false cancellable = locationSubject.sink( receiveCompletion: { _ in if !didReceiveValue { // subject completed without a value… continuation.resume(throwing: LocationService.Error.emptyLocations) } }, receiveValue: { value in // Make sure we only send a value once! guard !didReceiveValue else { return } didReceiveValue = true // Cancel current sink cancellable?.cancel() // We either got a location or an error continuation.resume(returning: value) } ) // Now that we monitor locationSubject, ask for the location DispatchQueue.global().async { self.manager.requestLocation() } } switch result { case .success(let location): // We got the location! return location case .failure(let failure): // We got an error :( throw failure } } // MARK: CLLocationManagerDelegate func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { defer { manager.stopUpdatingLocation() } guard let location = locations.first else { locationSubject.send(.failure(.emptyLocations)) return } debugPrint("[Location] location: \(location.coordinate)") manager.stopUpdatingLocation() if geocoder.isGeocoding { geocoder.cancelGeocode() } geocoder.reverseGeocodeLocation(location) { [weak self] marks, error in guard let mark = marks?.last else { self?.locationSubject.send(.failure(.emptyMarks)) return } debugPrint("[Location] mark: \(mark.description)") self?.locationSubject.send(.success(mark)) } } func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) { locationSubject.send(.failure(.errorMsg(error.localizedDescription))) } } I found it had not any response when the app intent performed. And there is a location logo tips in the top left corner of phone screen.

Live activity does not update its content's text color when the iPhone goes to sleep mode. Only the background color of live activity changes to dark mode but all the contents stay in light mode.

I introduced lottie to toggle in my widget to show a transition animation, but found that the.json file wouldn't load. The loading_hc.json file is validated and exists in the widget target. Ask for help, thank you! struct LottieView: UIViewRepresentable { let animationName: String func makeUIView(context: Context) -> LOTAnimationView { let lotAnimationView = LOTAnimationView(name: animationName, bundle: .main) lotAnimationView.contentMode = .scaleAspectFit lotAnimationView.play() return lotAnimationView } func updateUIView(_ uiView: LOTAnimationView, context: Context) { } func makeCoordinator() -> Coordinator { Coordinator() } } struct ControlToggleDisarmingStyle: ToggleStyle { func makeBody(configuration: Configuration) -> some View { if configuration.isOn { LottieView(animationName: "loading_hc.json").foregroundColor(.clear).frame(width: 24,height: 24) } else { Image("icon_disarm", bundle: Bundle.main).foregroundColor(.clear) } } }

Before ios18, when two fingers are switched to single fingers, the printing scale value will not change. When switching to two fingers again, the pinch and zoom printing scale will change. The same operation is performed after ios18, and two fingers are switched to single fingers. Switch back to two fingers, and the scale printing will not change. code here: - (void)pinchGesture:(UIPinchGestureRecognizer *)recognizer { NSSet <UIEvent*> *events = [recognizer valueForKey:@"_activeEvents"]; UIEvent *event = [events anyObject]; if (recognizer.state == UIGestureRecognizerStateBegan) { NSLog(@"---- begin finger count: %d scale: %f",event.allTouches.count,recognizer.scale); recognizer.scale = 1.0; } else if (recognizer.state == UIGestureRecognizerStateChanged) { NSLog(@"---- change finger count: %d scale: %f",event.allTouches.count,recognizer.scale); // recognizer.scale = 1.0; } log image for iOS 17.7 log image for ios18.0.2

We are currently trying to adopt the newly introduced find bar in our app. The app: The app is a text editor with a main text view. However it includes nested views (for text like footnotes) that are presented as modal sheets. So you tap on the footnote within the main text, a form sheet is presented with the contents of the footnote ready to be edited. We have an existing search implementation, but are eager to move to the system-provided UI. Connecting the find bar through a custom UIFindSession with our existing implementation is working without any issues. The Problem: Searching for text does not only work in the main text view, but also nested text (like footnotes). Let's say I have a text containing the word "iPhone" both in the main text and the footnote. In our existing implementation, stepping from the search match to the next one would open the modal and highlight the match in the nested text. The keyboard would stay open. With the new UIFindInteraction this is not working however. As soon as a modal form sheet is presented, the find interaction closes. By looking at the stack trace I can see a private class called UIInputWindowController that cleans up input accessory views after the modal gets presented. I believe it is causing the find panel to give up its first responder state. I noticed that opening popovers appears to be working fine. Is there a way to alter the presentation of the nested text so that the view is either not modal or able to preserve the current find session? Or is this unsupported behavior and we should try and look for a different way? The thing that really confuses me is that this appears to work without issue in Notes.app. There the find bar is implemented as well. There are multiple views that can be presented while the find bar is open. Move Note is one of them. The view appears as a modal sheet. It keeps the find bar open and active, though its tint color matches the deactivated one of the main Notes view. The find bar is still functional with the text field being active and the overlay updating in the background. This behavior appears to be a bug in the Notes app, but is exactly what we want for our use case. I attached some images: Two are from the Notes app, two from a test project demonstrating the problem. Opening a modal view closes the find bar there.

Here is a relatively simple code fragment: let attributedQuote: [NSAttributedString.Key: Any] = [ .font: FieldFont!, .foregroundColor: NSColor.red] let strQuote = NSAttributedString.init(string:"Hello World", attributes:attributedQuote) strQuote.draw(in: Rect1) It compiles without an issue, bur when I execute it, I get: "*** -colorSpaceName not valid for the NSColor <NSColor: 0x6000005adfd0>; need to first convert colorspace." I have tried everything I can think of. What's going on?

Hello, I experienced a strange behavior with SceneView and a .frame() modifier. Here is a minimal example: import SwiftUI import SceneKit struct MinimalSceneKitExample: View { var simpleScene: SCNScene { let scene = SCNScene() let boxGeometry = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0) let boxNode = SCNNode(geometry: boxGeometry) boxNode.position = SCNVector3(0, 0, 0) scene.rootNode.addChildNode(boxNode) return scene } var body: some View { SceneView( scene: SCNScene(), options: [.allowsCameraControl, .autoenablesDefaultLighting] ) .frame(maxWidth: .infinity, maxHeight: 312.6) } } This code turns the SceneView into a black view. Only some height values are causing this behavior. For example the height value 312.3 is fine. In my app, I'm using a dynamic height value that depends on the device's screen size which results in this behavior on some devices. Took me days to find this cause. So far integer values seem to always work which is what I will use as a quick fix for now. Should I file a bug ticket for this?

I'm trying to implement a 3 column NavigationSplitView in SwiftUI on macOS - very similar to Apple's own NavigationCookbook sample app - with the slight addition of multiple sections in the sidebar similar to how the Apple Music App has multiple sections in the sidebar. Note: This was easily possible using the deprecated NavigationLink(tag, selection, destination) API The most obvious approach is to simply do something like: NavigationSplitView(sidebar: { List { Section("Section1") { List(section1, selection: $selectedItem1) { item in NavigationLink(item.label, value: item) } } Section("Section2") { List(section2, selection: $selectedItem2) { item in NavigationLink(item.label, value: item) } } } }, content: { Text("Content View") }, detail: { Text("Detail View") }) But unfortunately, this doesn't work - it doesn't seem to properly iterate over all of the items in each List(data, selection: $selected) or the view is strangely cropped - it only shows 1 item. However if the 1 item is selected, then the appropriate bindable selection value is updated. See image below: If you instead use ForEach for enumerating the data, that does seem to work, however when you use ForEach, you loose the ability to track the selection offered by the List API, as there is no longer a bindable selection propery in the NavigationLink API. NavigationSplitView(sidebar: { List { Section("Section1") { ForEach(section1) { item in NavigationLink(item.label, value: item) } } Section("Section2") { ForEach(section2) { item in NavigationLink(item.label, value: item) } } } }, content: { Text("Content View") }, detail: { Text("Detail View") }) We no longer know when a sidebar selection has occurred. See image below: Obviously Apple is not going to comment on the expected lifespan of the now deprecated API - but I am having a hard time switching to the new NavigationLink with a broken sidebar implementation.

Environment Mac mini M4 Pro macOS: Version 15.1.1 (24B2091) Xcode: Version 16.1 (16B40) IME: Kotoeri, Google IME Code description struct ContentView: View { @State var text = “” @State var selection: TextSelection? var body: some View { VStack { TextEditor(text: $text, selection: $selection) } .padding() } } Issue Description When built for macOS (not Catalyst, Designed for iPad) and typing “あ” in Japanese input, it crashes. I tried using Kotoeri's Kana input, Kotoeri's Roman input, and Google IME, but the same error occurs and crashes in both cases. There is no issue when using English input. Errors (input method 56222 com.apple.inputmethod.Kotoeri.KanaTyping) (1): Fatal error: String index is out of bounds (input method 56338 com.apple.inputmethod.Kotoeri.RomajiTyping (1): Fatal error: String index is out of bounds Swift/StringUTF16View.swift:368: Fatal error: String index is out of bounds

Hello, my production app is experiencing some crashes according to app store analytics. I cannot seem to reproduce it. According to Xcode Orginzer the app is crashing 10 SwiftUI 0x000000018ec372a0 PlatformViewHost.updateNestedHosts(_:colorSchemeChanged:) + 332 (PlatformViewHost.swift:699) Distributor ID: com.apple.AppStore Hardware Model: iPhone13,4 Version: 2.0.3 (86) AppStoreTools: 15E204 AppVariant: 1:iPhone13,4:16 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] OS Version: iPhone OS 17.4.1 (21E236) Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: SIGNAL 6 Abort trap: 6 Triggered by Thread: 0 Kernel Triage: VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter VM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter Thread 0 name: Thread 0 Crashed: 0 libsystem_kernel.dylib 0x00000001d1bd6974 __pthread_kill + 8 (:-1) 1 libsystem_pthread.dylib 0x00000001e56590ec pthread_kill + 268 (pthread.c:1717) 2 libsystem_c.dylib 0x0000000191627c14 __abort + 136 (abort.c:159) 3 libsystem_c.dylib 0x0000000191627b8c abort + 192 (abort.c:126) 4 libswiftCore.dylib 0x000000018832a690 swift::fatalErrorv(unsigned int, char const*, char*) + 136 (Errors.cpp:387) 5 libswiftCore.dylib 0x000000018832a6b0 swift::fatalError(unsigned int, char const*, ...) + 32 (Errors.cpp:395) 6 libswiftCore.dylib 0x0000000188324a08 getNonNullSrcObject(swift::OpaqueValue*, swift::TargetMetadata&lt;swift::InProcess&gt; const*, swift::TargetMetadata&lt;swift::InProcess&gt; const*) + 256 (DynamicCast.cpp:144) 7 libswiftCore.dylib 0x0000000188326510 tryCastToObjectiveCClass(swift::OpaqueValue*, swift::TargetMetadata&lt;swift::InProcess&gt; const*, swift::OpaqueValue*, swift::TargetMetadata&lt;swift::InProcess&gt; const*, swift::TargetMetadata&lt;swift::InPro... + 88 (DynamicCast.cpp:510) 8 libswiftCore.dylib 0x0000000188324068 tryCast(swift::OpaqueValue*, swift::TargetMetadata&lt;swift::InProcess&gt; const*, swift::OpaqueValue*, swift::TargetMetadata&lt;swift::InProcess&gt; const*, swift::TargetMetadata&lt;swift::InProcess&gt; const*&amp;, sw... + 992 (DynamicCast.cpp:2281) 9 libswiftCore.dylib 0x0000000188323b14 swift_dynamicCast + 208 (CompatibilityOverrideRuntime.def:109) 10 SwiftUI 0x000000018ec372a0 PlatformViewHost.updateNestedHosts(_:colorSchemeChanged:) + 332 (PlatformViewHost.swift:699) 11 SwiftUI 0x000000018ec36bf4 PlatformViewHost.updateEnvironment(_:viewPhase:) + 412 (PlatformViewHost.swift:690) 12 SwiftUI 0x000000018ec37bf8 PlatformViewHost.init(_:host:environment:viewPhase:importer:) + 808 (PlatformViewHost.swift:132) 13 SwiftUI 0x000000018ec36cf8 PlatformViewHost.__allocating_init(_:host:environment:viewPhase:importer:) + 92 (PlatformViewHost.swift:0) 14 SwiftUI 0x000000018ec0132c closure #1 in closure #1 in closure #4 in closure #1 in PlatformViewChild.updateValue() + 444 (PlatformViewRepresentable.swift:559) 15 SwiftUI 0x000000018ec06c58 partial apply for closure #1 in closure #1 in closure #4 in closure #1 in PlatformViewChild.updateValue() + 24 (&lt;compiler-generated&gt;:0) 16 SwiftUI 0x000000018ea26910 RepresentableContextValues.asCurrent&lt;A&gt;(do:) + 156 (RepresentableContextValues.swift:43) 17 SwiftUI 0x000000018ec01124 closure #1 in closure #4 in closure #1 in PlatformViewChild.updateValue() + 176 (PlatformViewRepresentable.swift:558) 18 SwiftUI 0x000000018ec0104c closure #4 in closure #1 in PlatformViewChild.updateValue() + 128 (PlatformViewRepresentable.swift:557) 19 SwiftUI 0x000000018ec06b2c partial apply for closure #4 in closure #1 in PlatformViewChild.updateValue() + 24 (&lt;compiler-generated&gt;:0) 20 SwiftUI 0x000000018de7b7d0 closure #1 in _withObservation&lt;A&gt;(do:) + 44 (ObservationUtils.swift:26) 21 SwiftUI 0x000000018ec06b50 partial apply for closure #1 in _withObservation&lt;A&gt;(do:) + 24 (&lt;compiler-generated&gt;:0) 22 libswiftCore.dylib 0x0000000187fd0068 withUnsafeMutablePointer&lt;A, B&gt;(to:_:) + 28 (LifetimeManager.swift:82) 23 SwiftUI 0x000000018ebffbdc closure #1 in PlatformViewChild.updateValue() + 3040 (PlatformViewRepresentable.swift:556) 24 SwiftUI 0x000000018d5ecbf8 partial apply for implicit closure #1 in closure #1 in closure #1 in Attribute.init&lt;A&gt;(_:) + 32 (&lt;compiler-generated&gt;:0) 25 AttributeGraph 0x00000001b2150240 AG::Graph::UpdateStack::update() + 512 (ag-graph-update.cc:578) 26 AttributeGraph 0x00000001b2146f38 AG::Graph::update_attribute(AG::data::ptr&lt;AG::Node&gt;, unsigned int) + 424 (ag-graph-update.cc:719) 27 AttributeGraph 0x00000001b2146810 AG::Graph::input_value_ref_slow(AG::data::ptr&lt;AG::Node&gt;, AG::AttributeID, unsigned int, unsigned int, AGSwiftMetadata const*, unsigned char&amp;, long) + 720 (ag-graph.cc:1429)