“swiftui”

When running a SwiftUI DocumentGroup app on macOS designed for iPad, onDisappear is not called when closing a document, and deinit of state objects owned by a ContentView is not invoked. This behavior works as expected on iPad. @main struct MyApp: App { var body: some Scene { DocumentGroup(newDocument: MyDocument()) { file in ContentView(document: file.$document) .onDisappear { print(This isn't called on macOS Designed For iPad, but is on iPad when closing a document.) } } } } It is my understanding that for a macOS designed for iPad these lifecycle events would behave the same - otherwise there appears to be no way to detect if a document has closed on macOS.

Build the sample code below, type something in the textfield (make sure the num pad is a popup and that the text keyboard is floating). And tap multiple times outside of the textfield in the sheet. That will lead to the crash: *** Terminating app due to uncaught exception 'NSGenericException', reason: 'Unable to activate constraint with anchors and because they have no common ancestor. Does the constraint or its anchors reference items in different view hierarchies? That's illegal.' terminating due to uncaught exception of type NSException CoreSimulator 1051.17.8 - Device: iPad Pro 13-inch (M5) (655000D7-41BC-4B13-BD07-BBA80D892E97) - Runtime: iOS 26.2 (23C54) - DeviceType: iPad Pro 13-inch (M5) Does anyone have the slightest idea of a workaround? I can't find one. import SwiftUI struct ContentView: View { var body: some View { Text(Content) .sheet(isPresented: .constant(true)) { PresentedView() } } } struct PresentedView: View { @State private var text = var body: some View { ScrollView { VStack

I'm running macOS 26.3 and using Xcode 26.4. I'm trying to create a SwiftUI Chart that can scroll horizontally. In the SwiftUI Preview, and also running the app on macOS, the chart displays a scrollbar, but the scrollbar does not respond to mouse interaction (dragging the scrollbar, or clicking in the gutters on either side of the scrollbar). Here's the sample code: import SwiftUI import Charts private struct DataPoint: Identifiable { let id: Int let x: Double let value: Double } struct ContentView: View { private let points: [DataPoint] = (0..<60).map { index in let wave = sin(Double(index) * 0.28) * 18 let trend = Double(index) * 0.35 return DataPoint(id: index, x: Double(index), value: 60 + wave + trend) } var body: some View { Chart(points) { point in BarMark( x: .value(Data Point, point.x), y: .value(Value, point.value) ) .foregroundStyle(.blue.gradient) } .chartScrollableAxes(.horizontal) // Doesn't work: // .scrollIndicators(.hidden) // .never also does not work .chartXVis

According tho Claude, The crash is clearly a bug in Xcode's built-in AI chat feature (IDEIntelligenceChat), not an authentication issue or anything on your end. What the crash log shows: The crash is happening in IDEIntelligenceChat — specifically in ChatInputEditorView.updateView and SourceEditorDataSource.ideChat_gracefullyApplyChangesToReflect. It's a SIGTRAP (assertion/precondition failure) triggered while SwiftUI is trying to lay out the AI chat panel. This is an Apple bug in Xcode 26.2 itself.

Hi everyone, yesterday I updated my macOS and Xcode to the latest versions and today I have the strangest thing: Canvas is always crashing whenever I click it, in any and all my Projects. The full Simulator works just fine; only the Preview Canvas crashes. All the crash reports say it's because of AXRemoteElement-BackgroundFetch, and ChatGPT says it's not because of my code. These are very simple Projects, just for experimentation. Nothing complex, just native code while I follow examples in a SwiftUI book. Anyone else having this issue? Translated Report (Full Report Below) ------------------------------------- Process: PreviewShell [2179] Path: /Volumes/VOLUME/*/PreviewShell.app/PreviewShell Identifier: com.apple.PreviewShell Version: 16.0 (23.40.29) Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd_sim [1405] Coalition: com.apple.CoreSimulator.SimDevice.E9525D59-3C07-43F9-ACC9-18CF5DD0DAA1 [1516] Responsible Process: SimulatorTrampoline [1120] User ID: 501 Date/Time: 2026-03-26 1

The background I'm finally working to convert my very old Mac kaleidoscope application, ScopeWorks, which was written in OpenGL and Objective-C, to a Multiplatform app in SwiftUI and Metal. I'm using the MetalKit MTKView class, wrapped for SwiftUI as an NSViewRepresentable or UIViewRepresentable. I then provide an MTKViewDelegate that provides a draw method. The draw method fetches the current render pass descriptor, creates a command buffer, sets up a render pipeline, and does its drawing. My renderer's makePipeline method looks like this: func makePipeline() { let library = device.makeDefaultLibrary() let pipelineDesc = MTLRenderPipelineDescriptor() pipelineDesc.vertexFunction = library?.makeFunction(name: vertex_main) pipelineDesc.fragmentFunction = library?.makeFunction(name: fragment_main) pipelineDesc.colorAttachments[0].pixelFormat = .bgra8Unorm pipeline = try! device.makeRenderPipelineState(descriptor: pipelineDesc) } And my shaders look like this: struct VertexOut { float4 position

After having built the SwiftUI project numerous times from Xcode and allowing the plugins after the first build post install using xcodebuild -scheme build fails with: The following build commands failed: Validate plug-in “SwiftLintBuildToolPlugin” in package “swiftlintplugins” Validate plug-in “OpenAPIGenerator” in package “swift-openapi-generator” How are we supposed to grant the plugins permission to run in the CLI? Everything I'm getting from Gemini is for packages, not apps.

Hi everyone, I have a SwiftUI app using CKQuerySubscription on the public database for social notifications (friend requests, recommendations, etc.). Push notifications work perfectly in the Development environment but never fire in Production (TestFlight). Setup: iOS 26.4, Xcode 26, Swift 6 Container: public database, CKQuerySubscription with .firesOnRecordCreation 5 subscriptions verified via CKDatabase.allSubscriptions() registerForRemoteNotifications() called unconditionally on every launch Valid APNS device token received in didRegisterForRemoteNotificationsWithDeviceToken Push Notifications + Background Modes (Remote notifications) capabilities enabled What works: All 5 subscriptions create successfully in Production Records are saved and queryable (in-app CloudKit fetches return them immediately) APNS production push works — tested via Xcode Push Notifications Console with the same device token, notification appeared instantly Everything works perfectly in the Development environment (subscrip

I submitted this to Feedback Assistant as FB22331090 and wanted to share a minimal reproducible example here in case others are seeing the same issue. Environment: Xcode 26.4 or Xcode 26.3 Apple Swift version 6.3 (swiftlang-6.3.0.123.5 clang-2100.0.123.102) Effective Swift language version 5.10 Deployment target: iOS 17.0 The sample app builds successfully for normal development use, but archive fails. The crash happens during optimization in EarlyPerfInliner while compiling the synthesized deinit of a nested generic Coordinator class. The coordinator stores a UIHostingController. Minimal reproducer: import SwiftUI struct ReproView: UIViewRepresentable { let content: Content func makeUIView(context: Context) -> UIView { context.coordinator.host.view } func updateUIView(_ uiView: UIView, context: Context) { context.coordinator.host.rootView = content } func makeCoordinator() -> Coordinator { Coordinator(content: content) } final class Coordinator { let host: UIHostingController init(content: Con

This started out as a plea for help, but in preparing this post I discovered the root cause. I'm posting it as a lesson learned in hopes it will help someone. I've spent a good chunk of March trying to get AR-mode working again in my unreleased game. I had it working with SceneKit and ARView 5 years ago, but since 2024 I've been converting the game to use RealityKit and RealityView on iOS, macOS, visionOS, and tvOS. I've been having no joy getting AR mode to work on iOS. I get the pass-through device video but the game content isn't anchored to the floor but rather anchored to the screen. I made a simple project with just a simple shape in the middle of a RealityView and an overlay with a SwiftUI toggle to go in and out of AR-mode. At first, my simple project worked, and I couldn't figure out what was different in the logic. Both projects used the same logic: func transitionToXR(_ content: inout RealityViewCameraContent) { content.remove(gameBoard.rootEntity) content.add(xrAnchor) content.camera = .s

Hi, I want to recreate a chart from Apple Health and I have code like this. When I scroll - especially the week and month charts, there are performance issues. If I remove .chartScrollPosition(x: $scrollChartPosition), it runs smoothly, but I need to know which part of the chart is currently displayed. Can you help me? import Charts import SwiftUI struct MacroChartView: View { var selectedRange: ChartRange var binnedPoints: [MacroBinPoint] @State private var scrollChartPosition: Date = .now var body: some View { VStack { Text((selectedRange.rangeLabel(for: scrollChartPosition))) Chart(binnedPoints) { point in BarMark( x: .value(Date, point.date, unit: selectedRange.binComponent), y: .value(Calories, point.calories) ) } .frame(height: 324) .chartXVisibleDomain(length: selectedRange.visibleDomainLength()) .chartScrollableAxes(.horizontal) .chartScrollPosition(x: $scrollChartPosition) .chartScrollTargetBehavior(.valueAligned(matching: selectedRange.scrollAlignmentComponents)) .chartXAxis { switch select