Hi all, I’m developing a timer app with Live Activity support. On iOS 18.5 (iPhone 14 Pro Max), I cannot get Live Activity to start. When I call Activity.request(...) in my main app, it throws an unsupportedTarget error, and nothing appears on the Lock Screen or Dynamic Island. What I’ve done: Widget Extension Info.plist: <key>NSExtension</key> <dict> <key>NSExtensionPointIdentifier</key> <string>com.apple.widgetkit-extension</string> </dict> <key>NSSupportsLiveActivities</key> <true/> <key>NSSupportsLiveActivitiesFrequentUpdates</key> <true/> Live Activity UI: Implemented with ActivityConfiguration(for: xxx_Clock_liveactivitiesAttributes.self) and Dynamic Island support. App Group: Both main app and extension use the same App Group, and it’s enabled in Apple Developer Center and Xcode. Tested on: iPhone 14 Pro Max, iOS 18.5 (official release) Xcode [your version] (I have not tested on iOS 17.x, so I am not sure if this issue is specific to iOS 18.5.) What I’ve tried: Cleaned build folder, deleted Derived Data, uninstalled and reinstalled app. Rebooted device. Double-checked all Info.plist and entitlements settings. Tried creating a new Widget Extension from scratch. Problem: Activity.request always throws unsupportedTarget. No Live Activity appears on Lock Screen or Dynamic Island. No other errors or crashes. Questions: Has anyone encountered this issue on iOS 18.5? Are there any new requirements or changes for Live Activity in iOS 18.5? Any suggestions or workarounds to make Live Activity work? Any help or suggestions would be greatly appreciated!

We are adding a live activity to our app that is started by a push to start live activity token that we supply to our server backend. In the app I have a Task that is retrieving pushToStartTokens from the asynchronous stream provided by the Apple API It looks similar to: // Iterate the async stream from the system for await tokenData in try await Activity<MyActivityAttributes>.pushToStartTokenUpdates { let tokenString = tokenData.map { String(format: "%02x", $0) }.joined() logger.log("Received push start token: \(tokenString, privacy: .public)") } } catch { logger.error("Failed to monitor push start tokens: \(error.localizedDescription, privacy: .public)") } When my app is launched from Xcode and connected via the debugger this code vends a pushToStartToken reliably. However if I run this same code by directly launching the app by tapping the icon on the phone, it almost never vends a pushToStartToken. It only occasionally works. I've tried a variation on the code where instead of always executing the asynchronous stream to obtain the token it first checks for the existence of a pushToStartToken using the this synchronous check prior to entering the for await if let pushStartTokenSync = Activity<AttributeType>.pushToStartToken { let tokenStr = pushStartToekSync.map { String(format: "%02x", $0) }.joined() nextPushToStartToken = pushStartTokenSync logger..log("**** Queried PushToStart Token: \(tokenStr, privacy: .public) ***") } else { logger..log("**** Queried PushToStart Token is nil! ***") } This works more reliably than just falling directly into the stream but I still see many instances where the result is nil. I'm trying to understand what is the correct way to obtain and manage the pushToStartTokens so that getting one is as reliable as possible especially in production builds. When I do get a token, should I persist it somewhere and use that (even across different app executions) until a new one is vended? Appreciate hearing ideas, thoughts and any code samples that illustrate a good management scheme Thank, You. Rob S.

I have a button with the following properties: accessibilityLabel: "Action Button", traits: "Button", accessibilityHint: "Performs the main action". The voiceover reads the button as follows: Action Button, Button, Performs the main action. I want to understand how to configure it to only speak the accessibilityHint or only the accessibilityLabel and never speak the traits. In another example, a switch has the traits: Button, and Toggle. So these traits are a part of what the voiceover speaks. I want only the accessibilityLabel or accessibilityHint to be spoken in this case. Please let me know how. Thanks

For many years I've had the following code to access the active objects of a table view in my App Store app: class MyViewController: NSViewController: NSMenuItemValidation { private var tableView: NSTableView! private var objects = [MyObject]() func numberOfRows(in tableView: NSTableView) -> Int { return objects.count } func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? { // make view for row } private var activeObjects: [MyObject] { return tableView?.activeRowIndexes.map({ objects[$0] }) ?? [] } func validateMenuItem(_ menuItem: NSMenuItem) -> Bool { let activeObjects = self.activeObjects ... } } extension NSTableView { var activeRowIndexes: IndexSet { return clickedRow == -1 || selectedRowIndexes.contains(clickedRow) ? selectedRowIndexes : IndexSet(integer: clickedRow) } } In one of the recent updates, I wanted to add some kind of header to the table view, so I decided to add a row at the beginning and offset the indexes by 1. func numberOfRows(in tableView: NSTableView) -> Int { return objects.count + 1 } func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? { if row == 0 { // make header view } else { // make view for row - 1 } } private var activeObjects: [MyObject] { return tableView?.activeRowIndexes.subtracting(IndexSet(integer: 0)).map({ objects[$0 - 1] }) ?? [] } But since I added this change, Xcode regularly downloads crash reports from clients crashing during menu item validation in IndexSet.map with reason Code 5 Trace/BPT trap: 5. I assumed that I was accessing an invalid array index, so I added some debug code: the crash report would then show the invalid index beside the crashed thread's name. private var activeObjects: [MyObject] { return tableView?.activeRowIndexes.subtracting(IndexSet(integer: 0)).map({ i in if !objects.indices.contains(i - 1) { Thread.current.name = (Thread.current.name ?? "") + ". Invalid index \(i - 1) for count \(objects.count)" preconditionFailure() } return objects[i - 1] }) ?? [] } But the crash reports for this new app version look just like the old ones and the thread name is not changed. Indeed, when recreating an invalid index access on my Mac, the crash report mentions Array._checkSubscript(_:wasNativeTypeChecked:), which does not appear in the crash reports downloaded by Xcode. Manually symbolicating the crash report also doesn't give any more information: all lines referring to my app code are resolved to either /<compiler-generated>:0 or MyViewController.swift:0. Apparently the problem is not an invalid array index, but something else. Does anybody have a clue what the problem could be? (Note: the crash report mentions Sequence.compactMap because now I'm effectively calling tableView?.activeRowIndexes.compactMap, but the same crash happened before when calling IndexSet.map, which would appear in the crash report as Collection.map.) crash2.crash

This was also raised in FB17028569 I have iOS document based app using DocumentGroup. I can create and save documents as expected. All that functionality is fine. @main struct FooBarApp: App { var body: some Scene { DocumentGroup(newDocument: { FoobarDocument() }) { config in MainView(document: config.document) } The problem is when I open an app document from Files.app or Messages the document is never opened directly into the editor, the document browser interface is always presented and the user must manually select the document to open an editor. This also happens when I use UIApplication.shared.requestSceneSessionActivation(nil, userActivity: activity, options: nil) to open a new scene. The doc isn't opened into my editor. I believe my plist document types are setup correctly and that my ReferenceFileDocument is setup correctly <key>CFBundleDocumentTypes</key> <array> <dict> <key>CFBundleTypeExtensions</key> <array> <string>foobar</string> </array> <key>CFBundleTypeIconFile</key> <string>icon-128</string> <key>CFBundleTypeIconSystemGenerated</key> <integer>1</integer> <key>CFBundleTypeMIMETypes</key> <array> <string>application/json</string> </array> <key>CFBundleTypeName</key> <string>Foobar Project</string> <key>LSHandlerRank</key> <string>Owner</string> <key>LSItemContentTypes</key> <array> <string>com.digital-dirtbag.foobar</string> </array> <key>NSUbiquitousDocumentUserActivityType</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER).ubiquitousdoc</string> </dict> </array> <key>UTExportedTypeDeclarations</key> <array> <dict> <key>UTTypeConformsTo</key> <array> <string>public.data</string> </array> <key>UTTypeDescription</key> <string>Foobar Project</string> <key>UTTypeIconFiles</key> <array> <string>icon-128.png</string> </array> <key>UTTypeIdentifier</key> <string>com.digital-dirtbag.foobar</string> <key>UTTypeTagSpecification</key> <dict> <key>public.filename-extension</key> <array> <string>foobar</string> </array> </dict> </dict> The question is does DocumentGroup on iOS even support opening documents directly into the editor view? I know it works on macOS as expected as I tried this with the demo code and it exhibits the same symptoms. Opening a document from iOS Files.app only gets you as far as the document browser while macOS will open an editor directly.

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

There are hundreds of functions in my project that require creating shortcuts, but AppShortcutsProvider only supports up to 10 AppShortcut declarations, so I used over 100 AppIntents for users to manually add shortcuts (I did not add them to AppShortcutsProvider); The problem now is that I hope all the AppIntents I declare have specific names and function icons. I have tried my best to configure AppIntents with the query document, but the default display in the shortcut app is the icon of this application instead of the function icon I set. My code is as follows: struct ResizeImageIntent: AppIntent { static var title: LocalizedStringResource = "修改图片尺寸" static var description: IntentDescription = IntentDescription("快速打开修改图片尺寸功能") static var openAppWhenRun: Bool = true func perform() async throws -> some IntentResult { if let url = URL(string: "toolbox://resizeimage") { await UIApplication.shared.open(url) } return .result() } } The following is the code with icon configuration added: struct VideoParseIntent: AppIntent { static var title: LocalizedStringResource = "万能解析" static var description: IntentDescription = IntentDescription("快速打开万能解析功能") static var openAppWhenRun: Bool = true // 修正：返回AppShortcut数组 static var appShortcuts: [AppShortcut] { [ AppShortcut( intent: VideoParseIntent(), phrases: ["使用万能解析"], systemImageName: "play.rectangle.on.rectangle" // 系统内置图标 ) ] } func perform() async throws -> some IntentResult { if let url = URL(string: "toolbox://videoparse") { await UIApplication.shared.open(url) } return .result() } }

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?

If you try to add a graph for a function in Apple Notes you can see that numbers marking coordinates are positioned along the axes (see screenshot 1). But when I am making my own plot view with Swift Charts I don't see that option. Marks for X axis are positioned at the bottom, and marks for Y axis are positioned to the right. I don't see an API that can configure them to be shown along the axes. Is there something that I am missing? Or is Apple just using some private API for that? I could make a custom overlay to display these marks, but then I will have to adjust them while zooming myself, which can be problematic.

I'm trying to create a .pkg installer with productbuild/pkgbuild. But I'd also like to add my custom installer plugin to this. I'm using the following script. I'd like to add my bundle into this script. Since there are no official docs from apple how to do this nor there are a lot of updated resources, here are some things I have tried. adding the following line to Distrubtion.xml <bundle id="pluginid" path="path/to/myplugin.bundle"/> adding component tag to pkgbuild also doesn't do anything --component "path/to/myplugin.bundle" The bundle itself is build with XCode - it is a simple UI for user to type some input in Apple provides documentation for Distribution.xml file, which supports different UI elements but doesn't support text input - docs I have been also looking at this tutorial , it is very outdated but i could still fit it to my needs except the part where the .bundle file needs to be inserted into .pkg. Note - there is no option to view the contents of .pkg file build with pkbuild/productbuild How can i do this process correctly? I would like to link my installer pane plugin to a generic .pkg(with licenses and so on). I'd appreciate any kind of help!

How can I create a view that is like the one in the Photos app where you can select an item and it fills the window, then you can drag / swipe between items in that view? I have a working prototype, and it works for photos. But once I get to a video, the gesture no longer works.

I got 3 PKCanvasView, 2 below the Major one. Users draw lines on the top one, then sync the last stroke to the one underneath. If the stroke crosses two PKCanvasView, we replace the stroke with a bezier curve. If a stroke doesn't cross regions, we sync the stroke to the one below it(B) as if it is drawn directly on B. The problem is if the B is inside a UIScrollview with a zoom scale not 1, the stroke from major to B will shrink or grow. Does anybody have a solution for this please? What I did Also put the major canvas into a uiScrollview, and make sure the zoomScale is the same as the B. for scale >=1, it works as expected, for scale < 1, sometimes it works, sometimes it doesn't. for example, 0.5, 0.6, 0.8, 0.5 doesn't work, 0.6, 0.8 works, I don't know why. What it costs It cost me 16*4 hours for these days. I didn't find a solution. Hopefully, some one can solve it.

I am trying to do inline to icon and text in tab bar but it is not allowing me to do it in compact, but it showing me in regular mode , but in regular mode tab bar going at top in portrait mode , But my requirement is tab bar required in bottom with icon and text in inline it showed by horizontally but it showing to me stacked vertically, will you guide me on this so that I can push the build to live users.

hi everyone, any thought on how to implement a RichText(markdown) live editor using the new TextEditor(text: AttributedString, selection: AttributedTextSelection)? Having issues like: how to get the location of the selected text relatived to the TextEditor bounds, which is used to show and position a floating toolbar. how to detect the cursor point is a new line and the content is "# ", (of couse now the user enter a space after the "#"), and if so, how to apply a H1 heading format to that line much more issues like this, but these two are how to get me started, thanks struct TextEditor8: View { @State var text: AttributedString @State var selection = AttributedTextSelection() @State var isShowFloatingToolbar = false @State var toolbarPosition: CGPoint = .zero init() { var text = AttributedString("Hello ✋🏻，Who is ready for Cooking?") let range = text.characters.indices(where: \.isUppercase) text[range].foregroundColor = .blue _text = State(initialValue: text) } var body: some View { ZStack(alignment: .topLeading) { GeometryReader { geo in TextEditor(text: $text, selection: $selection) .onChange(of: selection, perform: { newV in let v = text[newV] if v.characters.isEmpty { isShowFloatingToolbar = false } else { isShowFloatingToolbar = true toolbarPosition = CGPoint(x: 20, y: 20) // how to get CGPoint relatived to TextEditor from selection } print("vvvv", v.characters.isEmpty) }) } if isShowFloatingToolbar { FloatingToolbarAtSelection() .position(toolbarPosition) } } } }

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?

I use NSTextView in my app, and I am getting a LOT of crashes when I’m running the app with the debugger attached, and it all points to this spell checker in NSTextView. The crash happens as soon as the textview shows the ‘word completion’ option. If I turn off the “Continuous Spell Checking” option, it works fine, and it doesn’t crash. The exception reason given is: __NSCFString * "NSMutableRLEArray objectAtIndex:effectiveRange:: Out of bounds" This is what the stack trace looks like in Xcode: Thread 1 Queue : com.apple.main-thread (serial) #0 0x000000018335eb38 in objc_exception_throw () #1 0x0000000184e01910 in -[NSRLEArray objectAtIndex:effectiveRange:] () #2 0x0000000184e519a8 in -[NSMutableAttributedString addAttribute:value:range:] () #3 0x000000018818086c in -[NSText(NSTextAccessibilityPrivate) accessibilityAXAttributedStringForCharacterRange:parent:] () #4 0x0000000187f576b0 in -[NSAccessibilityAttributeAccessorInfo getParameterizedAttributeValue:forObject:withParameter:] () #5 0x0000000187f591a8 in ___NSAccessibilityEntryPointValueForAttributeWithParameter_block_invoke.799 () #6 0x0000000187f5458c in NSAccessibilityPerformEntryPointObject () #7 0x0000000187f56190 in NSAccessibilityEntryPointValueForAttributeWithParameter () #8 0x0000000187cb6a3c in CopyParameterizedAttributeValue () #9 0x00000002327057ac in ___lldb_unnamed_symbol4511 () #10 0x0000000232705854 in ___lldb_unnamed_symbol4512 () #11 0x000000018a5b3670 in _AXXMIGCopyParameterizedAttributeValue () #12 0x000000018a5d4894 in _XCopyParameterizedAttributeValue () #13 0x000000018a592ff8 in mshMIGPerform () #14 0x000000018382a250 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ () #15 0x000000018382a178 in __CFRunLoopDoSource1 () #16 0x0000000183828b78 in __CFRunLoopRun () #17 0x0000000183827c58 in CFRunLoopRunSpecific () #18 0x000000018f2bc27c in RunCurrentEventLoopInMode () #19 0x000000018f2bf4e8 in ReceiveNextEventCommon () #20 0x000000018f44a484 in _BlockUntilNextEventMatchingListInModeWithFilter () #21 0x000000018774fab4 in _DPSNextEvent () #22 0x00000001880ee5b0 in -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] () #23 0x00000001884b836c in -[NSCorrectionPanel _interceptEvents] () #24 0x00000001884b8f30 in -[NSCorrectionPanel showPanelAtRect:inView:primaryString:alternativeStrings:forType:completionHandler:] () #25 0x00000001880c91ec in -[NSSpellChecker showCorrectionIndicatorOfType:range:primaryString:alternativeStrings:forStringInRect:view:completionHandler:] () #26 0x00000001880ca0c0 in -[NSSpellChecker _showInlinePredictionForReplacingRange:markedRange:string:withString:view:client:lastReplacementRange:completeWordIndexes:resultDictionary:completionHandler:] () #27 0x00000001880cb26c in -[NSSpellChecker showCompletionForCandidate:selectedRange:offset:inString:rect:view:client:completionHandler:] () #28 0x0000000188303a94 in -[NSTextCheckingController handleCompletionFromCandidates:forSelectedRange:offset:inAnnotatedString:rect:view:] () #29 0x00000001882f9054 in -[NSTextCheckingController viewForRange:completionHandler:] () #30 0x00000001883041c8 in __60-[NSTextCheckingController handleCandidates:sequenceNumber:]_block_invoke () #31 0x000000018789105c in -[NSTextCheckingController annotatedSubstringForProposedRange:wrap:completionHandler:failureHandler:] () #32 0x0000000187890da4 in -[NSTextCheckingController annotatedSubstringForProposedRange:completionHandler:] () #33 0x00000001878927d4 in -[NSTextCheckingController annotatedSubstringForSelectedRangeWithCompletionHandler:] () #34 0x0000000188304134 in -[NSTextCheckingController handleCandidates:sequenceNumber:] () #35 0x00000001883067e0 in ___NSRunLoopTimerCreateWithHandler_block_invoke () #36 0x0000000183842e14 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ () #37 0x0000000183842ad4 in __CFRunLoopDoTimer () #38 0x0000000183842610 in __CFRunLoopDoTimers () #39 0x0000000183828a18 in __CFRunLoopRun () #40 0x0000000183827c58 in CFRunLoopRunSpecific () #41 0x000000018f2bc27c in RunCurrentEventLoopInMode () #42 0x000000018f2bf4e8 in ReceiveNextEventCommon () #43 0x000000018f44a484 in _BlockUntilNextEventMatchingListInModeWithFilter () #44 0x000000018774fab4 in _DPSNextEvent () #45 0x00000001880ee5b0 in -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] () #46 0x0000000187742c64 in -[NSApplication run] () #47 0x000000018771935c in NSApplicationMain () If I run the debug version of the app without the debugger, it works fine as well. In fact, if I run the app without "All Objective-C Exceptions" breakpoint, it also works fine. So it seems like some framework issue, which is making it hard to run and test my app. What’s the reason for this, and is this an issue I should be worried about for when the app is available to my users?

In my app I have TabView PageTabViewStyle(indexDisplayMode: .never) style and I want to display banner view on the top of the screen which, when displayed, pushes all other content down. Basic view setup is: struct ContentView: View { @StateObject private var viewModel = ContentViewModel() @State var selectedTab = 0 var body: some View { return VStack(spacing: 0) { if viewModel.showingBanner { bannerView } TabView(selection: $selectedTab, content: { ForEach(0..<3) { index in tabContents(index) .tag(index) } }) .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never)) } .ignoresSafeArea(edges: [.bottom]) } func tabContents(_ index: Int) -> some View { VStack { Text("Hello, \(index)!") .font(.system(size: 48, weight: .bold)) } } var bannerView: some View { VStack { Label("Banner", systemImage: "exclamationmark.triangle") .font(.largeTitle) .foregroundStyle(.white) .padding(4) } .frame(maxWidth: .infinity) .background(.red) .onTapGesture { withAnimation { viewModel.showingBanner = false } DispatchQueue.main.asyncAfter(deadline: .now() + 2) { withAnimation { viewModel.showingBanner = true } } } } } The problem is that when banner view is added, tab view content jitters during animation. There's several workarounds that make jittering go away, but by using them I lose some functionality: remove .ignoresSafeArea(edges: [.bottom]) - I need content to extend into safe area don't use page tabViewStyle - I lose scrolling between tabs Use plain ScrollView - I lose automatic binding to the selected tab Am I missing something in my TabView or content setup that causes this issue or my only recourse is to switch to using ScrollView instead of TabView for my use case?

error I get when I try and install predictive code completion model

Hi, I have a SwiftUI View, that is attached to a 3D object in Reality View. This is supposed to be a HUD for the user to select a few things. I wanted a sub menu for one of the top level buttons. But looks like none of the reasonable choices like Menu, Sheet or Popover work. Is there a known limitation of RealityKit Views where full SwiftUI cannot be used? Or am I doing something wrong? For example, Button { SLogger.info("Toggled") withAnimation { showHudPositionMenu.toggle() } } label: { HStack { Image(systemName: "rectangle.3.group") Text("My Button") } } .popover(isPresented: $showHudPositionMenu, attachmentAnchor: attachmentAnchor) { HudPositionMenuItems(showHudPositionMenu: $showHudPositionMenu, currentHudPosition: $currentHudPosition) } This will print "Toggled" but will not display the MenuItems Popover. If it makes any difference, this is attached to a child of a head tracked entity.

I made a small project that freezes after the following steps: Run the app Turn on VoiceOver Tap on "Header" once so it is read out loud Turn off VoiceOver Scroll up and down really quickly Using the Time Profiler, the items in the Main Thread followed by significant drops are: 19.11 s 85.1% 0 s closure #2 in closure #1 in ViewRendererHost.render(interval:updateDisplayList:targetTimestamp:) 13.05 s 58.1% 4.00 ms ViewGraph.updateOutputs(async:) 7.97 s 35.5% 83.00 ms AG::Graph::UpdateStack::update() 5.76 s 25.6% 19.00 ms LayoutScrollableTransform.updateValue() 1.73 s  7.7% 2.00 ms specialized NativeDictionary.setValue(:forKey:isUnique:) 579.00 ms  2.6% 58.00 ms 0x100a8c908 311.00 ms  1.4% 165.00 ms __thread_stack_pcs I see the memory usage increase by about 0.6 MB per second while frozen. And there are a few things that prevent the freeze: Changing LazyVStack for VStack Removing the VStack from the Section Removing the header: parameter from the Section Reducing the range of the ForEach Move the Text(verbatim: "Text at same level as ForEach containing Section") outside of the LazyVStack However, these are all things I need to keep for my actual app. So what is causing this hang? Am I using SwiftUI in any way it's not intended to be used? import SwiftUI struct ContentView: View { var body: some View { VStack { VStack(alignment: .leading) { Image(systemName: "pencil.circle.fill") Text("Title") Text("Label") } ScrollView { LazyVStack { Section { VStack { ForEach(0..<70) { _ in Text(verbatim: "A") } } } header: { Text(verbatim: "Header") } Text(verbatim: "Text at same level as ForEach containing Section") } } } } } AppDelegate: @main class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? ) -> Bool { let window = UIWindow(frame: UIScreen.main.bounds) window.rootViewController = UINavigationController(rootViewController: MainViewController()) window.makeKeyAndVisible() self.window = window return true } } MainViewController: import UIKit import SwiftUI final class MainViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let swiftUIView = ContentView() let hostingController = UIHostingController(rootView: swiftUIView) addChild(hostingController) hostingController.view.translatesAutoresizingMaskIntoConstraints = false view.addSubview(hostingController.view) NSLayoutConstraint.activate([ hostingController.view.topAnchor.constraint(equalTo: view.topAnchor), hostingController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor), hostingController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor), hostingController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor) ]) hostingController.didMove(toParent: self) view.backgroundColor = .white } }