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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scenePhase not behaving as expected on screen lock
Seeing weird sequences of changes when locking the screen when view is visable. .onChange(of: scenePhase) { phase in if phase == .active { if UIApplication.shared.applicationState == .active { print("KDEBUG: App genuinely became active") } else { print("KDEBUG: False active signal detected") } } else if phase == .inactive { print("KDEBUG: App became inactive") // Handle inactive state if needed } else if phase == .background { print("KDEBUG: App went to background") // Handle background state if needed } } seen: (locks screen) KDEBUG: App became inactive KDEBUG: App genuinely became active KDEBUG: App went to background expected (locks screen) KDEBUG: App became inactive KDEBUG: App went to background
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112
Apr ’25
PasteButton in a confirmationDialog
Hey, Anyone knows of a possible way to present a PasteButton in a .confirmationDialog on iOS? when I try adding it, it's ignored and not displayed with the rest of the buttons struct MyView: View { @State var flag: Bool = false var body: some View { Text("Some Text") .confirmationDialog("Dialog", isPresented: $flag) { Group { Button("A") {} Button("B") {} PasteButton(payloadType: Data.self) { data in } } } } }
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157
Mar ’25
App Launches on Login but Window Doesn't Appear Automatically (macOS Sequoia 15.2, Xcode 16.2)
I am developing a macOS app using SwiftUI, and I am encountering an issue when launching the app at login. The app starts as expected, but the window does not appear automatically. Instead, it remains in the Dock, and the user must manually click the app icon to make the window appear. Additionally, I noticed that the timestamp obtained during the app's initialization (init) differs from the timestamp obtained in .onAppear. This suggests that .onAppear does not trigger until the user interacts with the app. However, I want .onAppear to execute automatically upon login. Steps to Reproduce Build the app and add it to System Settings > General > Login Items as an item that opens at login. Quit the app and restart the Mac. Log in to macOS. Observe that the app starts and appears in the Dock but does not create a window. Click the app icon in the Dock, and only then does the window appear. Expected Behavior The window should be created and appear automatically upon login without requiring user interaction. .onAppear should execute immediately when the app starts at login. Observed Behavior The app launches and is present in the Dock, but the window does not appear. .onAppear does not execute until the user manually clicks the app icon. A discrepancy exists between the timestamps obtained in init and .onAppear. Sample Code Here is a minimal example that reproduces the issue: LoginTestApp.swift import SwiftUI @main struct LoginTestApp: App { @State var date2: Date init(){ date2 = Date() } var body: some Scene { WindowGroup { MainView(date2: $date2) } } } MainView.swift import SwiftUI struct MainView: View { @State var date1: Date? @Binding var date2: Date var body: some View { Text("This is MainView") Text("MainView created: \(date1?.description ?? "")") .onAppear { date1 = Date() } Text("App initialized: \(date2.description)") } } Test Environment Book Pro 13-inch, M1, 2020 macOS Sequoia 15.2 Xcode 16.2 Questions Is this expected behavior in macOS Sequoia 15.2? How can I ensure that .onAppear executes automatically upon login? Is there an alternative approach to ensure the window is displayed without user interaction?
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336
Mar ’25
detecting modifier keys using UITextFieldDelegate protocol
I have a UITextField in my application, and I want to detect all the keys uniquely to perform all relevant task. However, there is some problem in cleanly identifying some of the keys. I m not able to identify the backspace key press in the textField(_:shouldChangeCharactersIn:replacementString:) method. Also I don't know how to detect the Caps Lock key. I am intending to so this because I want to perform some custom handling for some keys. Can someone help me with what is the way of detecting it under the recommendation from apple. Thanks in advance. Note: checking for replacementString parameter in shouldChangeCharactersIn method for empty does not help for backspace detection as it overlaps with other cases.
Topic: UI Frameworks SubTopic: UIKit Tags:
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152
Mar ’25
UICollectionView Dequeue Crash Xcode 16.2
I am facing same issue with major crash while coming out from this function. Basically using collectionView.dequeReusableCell with size calculation. func getSizeOfFavouriteCell(_ collectionView: UICollectionView, at indexPath: IndexPath, item: FindCircleInfoCellItem) -> CGSize { guard let dummyCell = collectionView.dequeueReusableCell( withReuseIdentifier: TAButtonAddCollectionViewCell.reuseIdentifier, for: indexPath) as? TAButtonAddCollectionViewCell else { return CGSize.zero } dummyCell.title = item.title dummyCell.subtitle = item.subtitle dummyCell.icon = item.icon dummyCell.layoutIfNeeded() var targetSize = CGSize.zero if viewModel.favoritesDataSource.isEmpty.not, viewModel.favoritesDataSource.count > FindSheetViewControllerConstants.minimumFavoritesToDisplayInSection { targetSize = CGSize(width: collectionView.frame.size.width / 2, height: collectionView.frame.height) var estimatedSize: CGSize = dummyCell.systemLayoutSizeFitting(targetSize) if estimatedSize.width > targetSize.width { estimatedSize.width = targetSize.width } return CGSize(width: estimatedSize.width, height: targetSize.height) } } We have resolve issue with size calculation with checking nil. Working fine in xcode 15 and 16+. Note: Please help me with reason of crash? Is it because of xCode 16.2 onwards **strict check on UICollectionView **
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152
Apr ’25
app crashing in iPad Only
app crashing in iPad Only and not getting help from logs Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_PROTECTION_FAILURE at 0x000000016d667fd0 Exception Codes: 0x0000000000000002, 0x000000016d667fd0 VM Region Info: 0x16d667fd0 is in 0x16d664000-0x16d668000; bytes after start: 16336 bytes before end: 47 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL MALLOC_SMALL 132c00000-133000000 [ 4096K] rw-/rwx SM=PRV GAP OF 0x3a664000 BYTES ---> STACK GUARD 16d664000-16d668000 [ 16K] ---/rwx SM=NUL stack guard for thread 0 Stack 16d668000-16d764000 [ 1008K] rw-/rwx SM=SHM thread 0 Termination Reason: SIGNAL 11 Segmentation fault: 11 Terminating Process: exc handler [10927] Triggered by Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 UIKitCore 0x186fae04c __66-[UITraitCollection _traitCollectionByModifyingTraitsCopyOnWrite:]_block_invoke_2 + 4 1 UIKitCore 0x186faefdc __54-[UITraitCollection traitCollectionByModifyingTraits:]_block_invoke + 36 2 UIKitCore 0x186fabfc8 -[UITraitCollection _traitCollectionByModifyingTraitsCopyOnWrite:] + 252 3 UIKitCore 0x187109b08 -[UITraitCollection traitCollectionByModifyingTraits:] + 120 4 UIKitCore 0x1871c013c -[UIScreen _defaultTraitCollectionForInterfaceOrientation:inBounds:] + 224 5 UIKitCore 0x1871bff8c -[UIApplication _isOrientationVerticallyCompact:] + 48 6 UIKitCore 0x1871bcd28 -[UIApplication _isStatusBarHiddenForOrientation:] + 24 7 UIKitCore 0x186fe0d10 +[UIWindow(StatusBarManager) _prefersStatusBarHiddenInWindow:targetOrientation:animationProvider:] + 260 8 UIKitCore 0x186fe310c +[UIWindow(StatusBarManager) _prefersStatusBarHiddenInWindow:animationProvider:] + 72 9 UIKitCore 0x186fe2e00 -[UIApplication _isStatusBarEffectivelyHiddenForContentOverlayInsetsForWindow:] + 132 10 UIKitCore 0x186fe0a9c -[UIWindow _sceneSafeAreaInsetsIncludingStatusBar:] + 184 11 UIKitCore 0x187037628 -[UIWindow _normalizedSafeAreaInsets] + 64 12 UIKitCore 0x1870375a0 -[UIWindow safeAreaInsets] + 76 13 UIKitCore 0x186fa6c70 -[UIView _updateSafeAreaInsets] + 68 14 UIKitCore 0x188529824 -[UIView _recursiveEagerlyUpdateSafeAreaInsetsUntilViewController] + 176
Topic: UI Frameworks SubTopic: UIKit Tags:
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415
Mar ’25
popup window don't react to touch on iOS 18, works fine on iOS 17
popup window don't react to touch on iOS 18, works fine on iOS 17, this is the code: import SwiftUI extension View { public func popup<Content, Item>( item: Binding<Item?>, onDismiss: (() -> Void)? = nil, @ViewBuilder content: @escaping (Item) -> Content ) -> some View where Content: View, Item: Equatable { return self.overlay( PopupWrapper(item: item, onDismiss: onDismiss, content: content) ) } } struct PopupWrapper<Content, Item>: View where Content: View, Item: Equatable { @Binding var item: Item? var onDismiss: (() -> Void)? var content: (Item) -> Content @State var isAnimating = false var body: some View { Group { if let item { ZStack { Color.black .opacity(0.3) .ignoresSafeArea() .contentShape(Rectangle()) .gesture( TapGesture().onEnded { withAnimation(.spring(duration: 0.2)) { isAnimating = false DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) { dismiss() } } } ) content(item) .scaleEffect(isAnimating ? 1 : 0.3) .opacity(isAnimating ? 1 : 0) .onAppear { withAnimation(.spring(duration: 0.3)) { isAnimating = true } } .gesture( TapGesture().onEnded { withAnimation(.spring(duration: 0.2)) { isAnimating = false DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) { dismiss() } } } ) .onDisappear { dismiss() } } } else { EmptyView() } } } func dismiss() { item = nil isAnimating = false onDismiss?() } }
Topic: UI Frameworks SubTopic: SwiftUI
2
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80
Apr ’25
Regarding errors with UIToolbar and UIBarButtonItem set to UITextField
I set UIToolbar and UIBarButtonItem to UITextField placed on Xib, but when I run it on iOS18 iPad, the following error is output to Xcode Console, and UIPickerView set to UITextField.inputView is not displayed. Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. If you want to see the backtrace, please set CG_NUMERICS_SHOW_BACKTRACE environmental variable. Backtrace: <CGPathAddLineToPoint+71> <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadii:segments:smoothPillShapes:clampCornerRadii:] <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadius:segments:]+175> <+[UIBezierPath _roundedRectBezierPath:withRoundedCorners:cornerRadius:segments:legacyCorners:]+338> <-[_UITextMagnifiedLoupeView layoutSubviews]+2233> <__56-[_UITextMagnifiedLoupeView _updateCloseLoupeAnimation:]_block_invoke+89> <+[UIView(UIViewAnimationWithBlocksPrivate) _modifyAnimationsWithPreferredFrameRateRange:updateReason:animations:]+166> <block_destroy_helper.269+92> <block_destroy_helper.269+92> <__swift_instantiateConcreteTypeFromMangledName+94289> <block_destroy_helper.269+126> <+[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:anima <block_destroy_helper.269+6763> <block_destroy_helper.269+10907> <-[_UITextMagnifiedLoupeView _updateCloseLoupeAnimation:]+389> <-[_UITextMagnifiedLoupeView setVisible:animated:completion:]+256> <-[UITextLoupeSession _invalidateAnimated:]+329> <-[UITextRefinementTouchBehavior textLoupeInteraction:gestureChangedWithState:location:translation:velocity: <-[UITextRefinementInteraction loupeGestureWithState:location:translation:velocity:modifierFlags:shouldCanc <-[UITextRefinementInteraction loupeGesture:]+701> <-[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:]+71> <_UIGestureRecognizerSendTargetActions+100> <_UIGestureRecognizerSendActions+306> <-[UIGestureRecognizer _updateGestureForActiveEvents]+704> <_UIGestureEnvironmentUpdate+3892> <-[UIGestureEnvironment _updateForEvent:window:]+847> <-[UIWindow sendEvent:]+4937> <-[UIApplication sendEvent:]+525> <__dispatchPreprocessedEventFromEventQueue+1436> <__processEventQueue+8610> <updateCycleEntry+151> <_UIUpdateSequenceRun+55> <schedulerStepScheduledMainSection+165> <runloopSourceCallback+68> <__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+17> <__CFRunLoopDoSource0+157> <__CFRunLoopDoSources0+293> <__CFRunLoopRun+960> <CFRunLoopRunSpecific+550> <GSEventRunModal+137> <-[UIApplication _run]+875> <UIApplicationMain+123> <__debug_main_executable_dylib_entry_point+63> 10d702478 204e57345 Type: Error | Timestamp: 2025-03-09 00:22:46.121407+09:00 | Process: FurusatoLocalCurrency | Library: CoreGraphics | Subsystem: com.apple.coregraphics | Category: Unknown process name | TID: 0x5c360 Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) ( "<NSAutoresizingMaskLayoutConstraint:0x600002202a30 h=--& v=--& _UIToolbarContentView:0x7fc2c6a5b8f0.width == 0 (active)>", "<NSLayoutConstraint:0x600002175e00 H:|-(0)-[_UIButtonBarStackView:0x7fc2c6817b10] (active, names: '|':_UIToolbarContentView:0x7fc2c6a5b8f0 )>", "<NSLayoutConstraint:0x600002175e50 H:[_UIButtonBarStackView:0x7fc2c6817b10]-(0)-| (active, names: '|':_UIToolbarContentView:0x7fc2c6a5b8f0 )>", "<NSLayoutConstraint:0x6000022019f0 'TB_Leading_Leading' H:|-(8)-[_UIModernBarButton:0x7fc2a5aa8920] (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )>", "<NSLayoutConstraint:0x600002201a40 'TB_Trailing_Trailing' H:[_UIModernBarButton:0x7fc2a5aa8920]-(0)-| (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )>", "<NSLayoutConstraint:0x600002201e50 'UISV-canvas-connection' UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'.leading == _UIButtonBarButton:0x7fc2f57117f0.leading (active)>", "<NSLayoutConstraint:0x600002201ea0 'UISV-canvas-connection' UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'.trailing == UIView:0x7fc2a5aac8e0.trailing (active)>", "<NSLayoutConstraint:0x6000022021c0 'UISV-spacing' H:[_UIButtonBarButton:0x7fc2f57117f0]-(0)-[UIView:0x7fc2a5aa8330] (active)>", "<NSLayoutConstraint:0x600002202210 'UISV-spacing' H:[UIView:0x7fc2a5aa8330]-(0)-[_UIButtonBarButton:0x7fc2a5aa84d0] (active)>", "<NSLayoutConstraint:0x600002202260 'UISV-spacing' H:[_UIButtonBarButton:0x7fc2a5aa84d0]-(0)-[UIView:0x7fc2a5aac8e0] (active)>", "<NSLayoutConstraint:0x600002176f30 'UIView-leftMargin-guide-constraint' H:|-(0)-[UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':_UIButtonBarStackView:0x7fc2c6817b10 )>", "<NSLayoutConstraint:0x600002176e40 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600003b7d420'UIViewLayoutMarginsGuide']-(0)-|(LTR) (active, names: '|':_UIButtonBarStackView:0x7fc2c6817b10 )>" ) Will attempt to recover by breaking constraint <NSLayoutConstraint:0x600002201a40 'TB_Trailing_Trailing' H:[_UIModernBarButton:0x7fc2a5aa8920]-(0)-| (active, names: '|':_UIButtonBarButton:0x7fc2a5aa84d0 )> Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger. The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
Topic: UI Frameworks SubTopic: UIKit Tags:
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116
Mar ’25
SwiftUI FileImporter errors
When using FileImporter in SwiftUI, the following error is always returned when closed; even if the user taps "Cancel" The view service did terminate with error: Error Domain=_UIViewServiceErrorDomain Code=1 "(null)" UserInfo={Terminated=disconnect method} Recreation rate is 10/10. It feels like a threading issue, but in SwiftUI we are leveraging the .fileImporter modifier, so we cannot hold on to the reference like we would in a class. Is there a different approach we should be using for this? Code for recreation import SwiftUI struct ContentView: View { @State private var fileURL: URL? @State private var showFileImporter: Bool = false var body: some View { VStack { if let fileURL { Text(fileURL.absoluteString) } Button { showFileImporter = true } label: { Text("Select PDF") } .fileImporter( isPresented: $showFileImporter, allowedContentTypes: [.pdf], allowsMultipleSelection: true ) { result in switch result { case .success(let files): files.forEach { file in let gotAccess = file.startAccessingSecurityScopedResource() if !gotAccess { return } fileURL = file file.stopAccessingSecurityScopedResource() } case .failure(let error): print(error) } } } } }
1
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99
Apr ’25
MapKit causing TabBar Overwrite
Hi everyone! I am having a bit of trouble with why my Map() is overwriting my customized tabBar settings. Specifically my tab bar background. (White -> Black) Map(position: $cameraPosition) { UserAnnotation() } .toolbarBackground(.hidden, for: .tabBar) This above ^ is a view which acts as a tab view for my tab bar. I have customized my tab bar as follows just so it was obvious to see me changes. let tabAppearance = UITabBarAppearance() tabAppearance.configureWithOpaqueBackground() tabAppearance.backgroundColor = .white UITabBar.appearance().standardAppearance = tabAppearance UITabBar.appearance().scrollEdgeAppearance = tabAppearance I have tried implementing solutions which is seen with my .toolbar attempt but nothing has help. I would like the tab bar to be consistent with all of my views and from my understanding the Map is overwriting those settings.
1
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64
Apr ’25
LiveCommunicationKit events
how can i watch the LiveCommunicationKit event? i have codes likes this: import UIKit import LiveCommunicationKit @available(iOS 17.4, *) class LiveCallKit: NSObject, ConversationManagerDelegate { @available(iOS 17.4, *) func conversationManager(_ manager: ConversationManager, conversationChanged conversation: Conversation) { } @available(iOS 17.4, *) func conversationManagerDidBegin(_ manager: ConversationManager) { } @available(iOS 17.4, *) func conversationManagerDidReset(_ manager: ConversationManager) { } @available(iOS 17.4, *) func conversationManager(_ manager: ConversationManager, perform action: ConversationAction) { switch action.state { case .idle: self.completionHandler!(InterfaceKind.reject,self.payload!) case .running: self.completionHandler!(InterfaceKind.reject,self.payload!) case .complete: self.completionHandler!(InterfaceKind.reject,self.payload!) case .failed(let reason): self.completionHandler!(InterfaceKind.reject,self.payload!) default: self.completionHandler!(InterfaceKind.reject,self.payload!) } } @available(iOS 17.4, *) func conversationManager(_ manager: ConversationManager, timedOutPerforming action: ConversationAction) { } @available(iOS 17.4, *) func conversationManager(_ manager: ConversationManager, didActivate audioSession: AVAudioSession) { } @available(iOS 17.4, *) func conversationManager(_ manager: ConversationManager, didDeactivate audioSession: AVAudioSession) { } @objc public enum InterfaceKind : Int, Sendable, Codable, Hashable { /// 拒绝/挂断 case reject /// 接听. case answer } var sessoin: ConversationManager var callId: UUID var completionHandler: ((_ actionType: InterfaceKind,_ payload: [AnyHashable : Any]) -> Void)? var payload: [AnyHashable : Any]? @objc init(icon: UIImage!) { let data:Data = icon.pngData()!; let cfg: ConversationManager.Configuration = ConversationManager.Configuration(ringtoneName: "ring.mp3", iconTemplateImageData: data, maximumConversationGroups: 1, maximumConversationsPerConversationGroup: 1, includesConversationInRecents: false, supportsVideo: false, supportedHandleTypes: Set([Handle.Kind.generic])) self.sessoin = ConversationManager(configuration: cfg) self.callId = UUID() super.init() self.sessoin.delegate = self } @objc func toIncoming(_ payload: [AnyHashable : Any], displayName: String,actBlock: @escaping(_ actionType: InterfaceKind,_ payload: [AnyHashable : Any])->Void) async { self.completionHandler = actBlock do { self.payload = payload self.callId = UUID() var update = Conversation.Update(members: [Handle(type: .generic, value: displayName, displayName: displayName)]) let actNumber = Handle(type: .generic, value: displayName, displayName: displayName) update.activeRemoteMembers = Set([actNumber]) update.localMember = Handle(type: .generic, value: displayName, displayName: displayName); update.capabilities = [ .playingTones ]; try await self.sessoin.reportNewIncomingConversation(uuid: self.callId, update: update) try await Task.sleep(nanoseconds: 2000000000); } catch { } } } i want to watch the buttons action,how should i do?
Topic: UI Frameworks SubTopic: SwiftUI
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254
Mar ’25
Removing SwiftUI View from hierarchy
In a UIKit application, removing a view from the hierarchy is straightforward—we simply call myView.removeFromSuperview(). This not only removes myView from the UI but also deallocates any associated memory. Now that I'm transitioning to SwiftUI, I'm struggling to understand the recommended way to remove a view from the hierarchy, given SwiftUI's declarative nature. I understand that in SwiftUI, we declare everything that should be displayed. However, once a view is rendered, what is the correct way to remove it? Should all UI elements be conditionally controlled to determine whether they appear or not? Below is an example of how I’m currently handling this, but it doesn’t feel like the right approach for dynamically removing a view at runtime. Can someone guide me on the best way to remove views in SwiftUI? struct ContentView: View { @State private var isVisible = true var body: some View { VStack { if isVisible { // set this to false to remove TextView? Text("Hello, SwiftUI!") .padding() } Button("Toggle View") { ... } } } }
1
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282
Mar ’25
UINavigationController inside singleton
I have a struct that holds an instance of UINavigationController: struct NavigationController { static let shared = UINavigationController() } I use NavigationController.shared to push and pop ViewControllers around the app, rather than using the ViewController's .navigationController property. The issue I'm having is that when I pop I get new instances of my previous ViewController, this is my hierarchy: (0) UIWindow | ---- (1) NavigationController (is set as the UIWindow.rootViewController) | ---- (2) UITabBarController (is set with NavigationController.shared.setViewControllers) | ---- (3) ViewController (HomeVC) (is the first tab of the UITabController) | ---- (4) ViewController (ScanVC) (is pushed into the stack by NavigationController.shared.pushViewController) ---- (5) ViewController (NotificationsVC) ---- (6) ViewController (SettingsVC) I put a print statement in my HomeVC in the viewDidLoad method My understanding is that the viewDidLoad should only be called once in the lifecycle of a ViewController When I go back to the HomeVC from the ScanVC then the print always gets triggered which means I have a new instance of the HomeVC This is the print statement I created inside the viewDidLoad method: print("\(#function) View Did Load, instance: \(self)") Here's the output from going back and forth from the HomeVC to ScanVC: viewDidLoad() View Did Load, instance: <HomeVC: 0x118db0000> viewDidLoad() View Did Load, instance: <HomeVC: 0x118db3100> viewDidLoad() View Did Load, instance: <HomeVC: 0x118db0700> Any one has any suggestions on how to fix this? Because ideally going back to the HomeVC should not instantiate a new ViewController. I tested this on a small test project and viewDidLoad would only be triggered once when the ViewController was instantiated.
Topic: UI Frameworks SubTopic: UIKit Tags:
1
0
259
Mar ’25
Correct way to run modal session?
My assumption has always been that [NSApp runModalForWindow:] runs a modal window in NSModalPanelRunLoopMode. However, while -[NSApplication _doModalLoop:peek:] seems to use NSModalPanelRunLoopMode when pulling out the next event to process via nextEventMatchingMask:untilDate:inMode:dequeue:, the current runloop doesn't seem to be running in that mode, so during -[NSApplication(NSEventRouting) sendEvent:] of the modal-specific event, NSRunLoop.currentRunLoop.currentMode returns kCFRunLoopDefaultMode. From what I can tell, this means that any event processing code that e.g. uses [NSTimer addTimer:forMode:] based on the current mode will register a timer that will not fire until the modal session ends. Is this a bug? Or if not, is the correct way to run a modal session something like this? [NSRunLoop.currentRunLoop performInModes:@[NSModalPanelRunLoopMode] block:^{ [NSApp runModalForWindow:window]; }]; [NSRunLoop.currentRunLoop limitDateForMode:NSModalPanelRunLoopMode]; Alternatively, if the mode of the runloop should stay the same, I've seen suggestions to run modal sessions like this: NSModalSession session = [NSApp beginModalSessionForWindow:theWindow]; for (;;) { if ([NSApp runModalSession:session] != NSModalResponseContinue) break; [NSRunLoop.currentRunLoop limitDateForMode:NSModalPanelRunLoopMode]; } [NSApp endModalSession:session]; Which would work around the fact that the timer/callbacks were scheduled in the "wrong" mode. But running NSModalPanelRunLoopMode during a modal session seems a bit scary. Won't that potentially break the modality?
0
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109
Mar ’25
Uikit : -[UIApplication _terminateWithStatus:] + 136 (UIApplication.m:7539)
I have a few crash report from TestFlight with this context and nothing else. No symbols of my application. Crash report is attached. crashlog.crash It crashes at 16H25 (local time paris) and a few minutes after (8) I see the same user doing task in background (they download data with a particular URL in BGtasks) with a Delay that is consistant with a background wait of 5 or 7 minutes. I have no more information on this crash and by the way Xcode refuses to load it and shows an error. ( I did a report via Xcode for this).
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79
Mar ’25
SwiftUI refresh while alert is visible
Does causing a swiftui view refresh via modifying observed properties while an alert is visible allowed? I am seeing a warning 'Presenting view controller <SwiftUI.PlatformAlertController> from detached view controller is not supported, and may result in incorrect safe area insets and a corrupt root presentation. Make sure <SwiftUI.PlatformAlertController> is in the view hierarchy before presenting from it. Will become a hard exception in a future release.' and the warning 'Attempt to present <SwiftUI.PlatformAlertController> on (from ) while a presentation is in progress'. The second warning occurs more often.
5
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318
Mar ’25
Trouble using MKAnnotation on a MKMapView
Hi everyone, i'im having troubles using Annotation on a Map View. I have a a core data model called Location that conforms to NSManagedObject from CoreData and MKAnnotation form MapKit, and i'm trying to add an array of Location to a MKMview instance in a UIViewController class, by doing somethhing like this: mapView.addAnnotation(locations), but xcode compliants with a strange error which says Argument type '[Location]' does not conform to expected type 'MKAnnotation'. it's strange to me because my Location class conforms to MKAnnotation protocol and i implemented the protocol's methods (coordinate, title, subtitle). Please can anyone help me how to fix this issues. Thank you all
Topic: UI Frameworks SubTopic: UIKit Tags:
2
0
179
Mar ’25
Unable to open mach-O at path - metallib Error:2
When I toggle a panel like navigationsidebar, I get a message in the console. I guess it's not a big issue, but is there a way to fix this message? because it appears in every project. Unable to open mach-O at path: /AppleInternal/Library/BuildRoots/d187757d-b9a3-11ef-83e5-aabfac210453/Library/Caches/com.apple.xbs/Binaries/RenderBox/install/TempContent/Root/System/Library/PrivateFrameworks/RenderBox.framework/Versions/A/Resources/default.metallib Error:2
1
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510
Mar ’25