I have a ZStack that contains a VStack with 2 views (view1 and view2) and a third view (view3). So, is either that view1 and View1 are visible, or view3 is visible. This is the relevant code: ZStack { VStack { view1() View2() } if showView3 View3() } view1 and view2 are 400px in width and 200px in height, while view3 is 400 x 400 px, so that it completely overwrite view1/view2 when visible. The problem I'm trying to solve is that the border of a TextField placed in view1 is visible when showView3 is true, what should not be happening (possible glitch in swift?). To show the problem, I prepared a code sample, which shows that when view3 is active, it completely overwrites view1/view2, but still, the border of the TextField remains visible. (See screenshot below) struct TestZStackView: View { @State private var showView3 = false var body: some View { ZStack { VStack { Toggle("view3", isOn: $showView3) View1() .frame(width: 400, height: 200) .background(Color.red) .zIndex(1) View2() .frame(width: 400, height: 200) .background(Color.green) .zIndex(1) } if showView3 { View3() .frame(width: 400, height: 400) .background(Color.blue) .zIndex(2) } } } } struct View1: View { var body: some View { TextField("Enter text", text: .constant("")) .padding() .cornerRadius(5) .textFieldStyle(RoundedBorderTextFieldStyle()) .zIndex(1) } } struct View2: View { var body: some View { Color.clear } } struct View3: View { var body: some View { Color.black // (Ensure no transparency) } } zIndex() are not required, I just placed them to see if the problem get solved, but it may no difference. BTW, in the code above, the visible border disappears if the view is minimized, but that is not the case in the real app I'm working on. In the screenshots attached, it can be seen how the TextField border remains visible when view3 is active ("https://developer.apple.com/forums/content/attachment/d0e75f25-d36e-4361-af64-54252d1f2a98" "title=Screenshot 2024-05-24 at 10.06.03 PM.png;width=800;height=632")

I have a ZStack that contains a VStack with 2 views (view1 and view2) and a third view (view3). So, is either that view1 and View1 are visible, or view3 is visible. This is the relevant code: ZStack { VStack { view1() View2() } if showView3 View3() } view1 and view2 are 400px in width and 200px in height, while view3 is 400 x 400 px, so that it completely overwrite view1/view2 when visible. The problem I'm trying to solve is that the border of a TextField placed in view1 is visible when showView3 is true, what should not be happening (possible glitch in swift?). To show the problem, I prepared a code sample, which shows that when view3 is active, it completely overwrites view1/view2, but still, the border of the TextField remains visible. (See screenshot below) struct TestZStackView: View { @State private var showView3 = false var body: some View { ZStack { VStack { Toggle("view3", isOn: $showView3) View1() .frame(width: 400, height: 200) .background(Color.red) .zIndex(1) View2() .frame(width: 400, height: 200) .background(Color.green) .zIndex(1) } if showView3 { View3() .frame(width: 400, height: 400) .background(Color.blue) .zIndex(2) } } } } struct View1: View { var body: some View { TextField("Enter text", text: .constant("")) .padding() .cornerRadius(5) .textFieldStyle(RoundedBorderTextFieldStyle()) .zIndex(1) } } struct View2: View { var body: some View { Color.clear } } struct View3: View { var body: some View { Color.black // (Ensure no transparency) } } zIndex() are not required, I just placed them to see if the problem get solved, but it may no difference. BTW, in the code above, the visible border disappears if the view is minimized, but that is not the case in the real app I'm working on. In the screenshots attached, it can be seen how the TextField border remains visible when view3 is active ("https://developer.apple.com/forums/content/attachment/d0e75f25-d36e-4361-af64-54252d1f2a98" "title=Screenshot 2024-05-24 at 10.06.03 PM.png;width=800;height=632")

Hi everyone i am having trouble with layout. I am using storyboard for UI. While most of the iphone version are ok with my auto layout ... the first generation Iphone SE is giving me errors. To publish app on app store do i need it to be working perfectly on first generation Iphone SE too ? Any link or knowledge on layout for story board is much appreciated.

Microsoft did a very good job with UWP, when you build app for Windows Phone, those app automatically scales to big screen (horizontal oriented devices) Tablet, PC, Xbox. Kind of similar to website that have responsive UI. Eitherway, Apple needs to do something similar... there is no reason why phone apps are so small on my iMac. Even if it is already supported, Apple needs to encourage developers to implement it.

This crash happens online and cannot be tested and reproduced. I need help. Thank you very much. Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x000000018b4190d0 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: SIGNAL 5 Trace/BPT trap: 5 Terminating Process: exc handler [338] Triggered by Thread: 7 Last Exception Backtrace: 0 CoreFoundation 0x180cd7c60 __exceptionPreprocess + 216 (NSException.m:200) 1 libobjc.A.dylib 0x198507ee4 objc_exception_throw + 56 (objc-exception.mm:565) 2 CoreAutoLayout 0x1987cb000 _AssertAutoLayoutOnAllowedThreadsOnly + 412 (NSISEngine.m:0) 3 CoreAutoLayout 0x1987cdb7c -[NSISEngine withBehaviors:performModifications:] + 32 (NSISEngine.m:1975) 4 UIKitCore 0x1831262fc -[UIView _resetLayoutEngineHostConstraints] + 80 (NSLayoutConstraint_UIKitAdditions.m:1426) 5 UIKitCore 0x1830fc0c0 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2376 (UIView.m:18416) 6 QuartzCore 0x18477c520 CA::Layer::layout_if_needed(CA::Transaction*) + 528 (CALayer.mm:10118) 7 QuartzCore 0x18476f294 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 132 (CALayer.mm:2480) 8 QuartzCore 0x184782cc8 CA::Context::commit_transaction(CA::Transaction*, double, double*) + 464 (CAContextInternal.mm:2612) 9 QuartzCore 0x18478b79c CA::Transaction::commit() + 708 (CATransactionInternal.mm:449) 10 QuartzCore 0x1847dfe04 CA::Transaction::release_thread(void*) + 224 (CATransactionInternal.mm:651) 11 libsystem_pthread.dylib 0x1dc052d90 _pthread_tsd_cleanup + 520 (pthread_tsd.c:388) 12 libsystem_pthread.dylib 0x1dc055c08 _pthread_exit + 80 (pthread.c:1717) 13 libsystem_pthread.dylib 0x1dc05124c _pthread_wqthread_exit + 100 (pthread.c:2559) 14 libsystem_pthread.dylib 0x1dc050e88 _pthread_wqthread + 420 (pthread.c:2593) 15 libsystem_pthread.dylib 0x1dc05092c start_wqthread + 8 (:-1)

Hi can you add new feature in Pages and Numbers using Ai to apply style from PDF or template to documents, so ai arrange footers and headers and fonts , pages breaks , pages numbers, like one in PDF or templates , so we can auto format documents to desired look standard, also for Numbers. So we can on raw text upload pdf of another documents or report and get documents in that style for export to pdf or print Best regards,

giving this every time *** Assertion failure in void _engineVar_rawRemove(NSISEngineVar)(), NSISEngine_EngineVar.h:181 2024-03-21 16:29:48.644662+0530 Yanabea[6857:1455909] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Not possible to remove variable: 922: <unknown var (bug!) with engine as delegate:0x282bd7d80>{id: 10158} colIndex:103 from engine <NSISEngine: 0x1500b4350>{ delegate:0x14bdc8ca0 EngineVars: . . . . 78 -> 2 79 -> 1 80 -> 1 }.' terminating with uncaught exception of type NSException and rest thousands of line of logs that I am tried to attached in the attachment but it is not supporting.

I am new to using iOS Objective-C size classes like Regular, compact, Any. I found that Compact size classes are anything less than ~640 pts and Regular size classes are anything larger than ~640 pts . Is that correct for both iphone and ipad? How can I use size class to make an image full screen on all the iphone and ipad devices and on any orientation? How many images will I need? Any help and insight is greatly appreciated!

I am trying to self size DTAttributedTextContentView inside the collection cell based on its attributed text. The problem I face is that when I set attributedTextContentView width constraints like so: attributedTextContentView.widthAnchor.constraint(lessThanOrEqualToConstant: 260) it applies the whole constant width (in this case 260) to the textContentView, even if attributedString length is smaller than the width, leaving some extra space: My question is, how to size the frame of DTAttributedTextContentView so that it just encloses the text that it contains? Initially I used basic UITextView, but the scrolling of cells through collection view is not that smooth when there are multiple cells, and also it gives possibility to easy access the last line of the text inside, which I need for my app, so I would like to stick to DTAttributedTextContentView. Here is the sample code for testing: class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() configureCollectionView() } // MARK: - Collection view setup let collectionView: UICollectionView = { let layout = UICollectionViewCompositionalLayout { (section, environment) -> NSCollectionLayoutSection? in let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .estimated(10)) let item = NSCollectionLayoutItem(layoutSize: itemSize) let group = NSCollectionLayoutGroup.vertical(layoutSize: itemSize, subitems: [item]) let section = NSCollectionLayoutSection(group: group) section.interGroupSpacing = 5 return section } layout.configuration.scrollDirection = .vertical let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout) collectionView.register(ConversationCollectionViewCell.self, forCellWithReuseIdentifier: "ConversationCell") return collectionView }() private func configureCollectionView() { collectionView.dataSource = self collectionView.backgroundColor = .brown view.addSubview(collectionView) collectionView.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor), collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor), collectionView.topAnchor.constraint(equalTo: view.topAnchor), collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor) ]) } } // MARK: - Collection Data Source extension ViewController: UICollectionViewDataSource { func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return 10 } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ConversationCell", for: indexPath) as! ConversationCollectionViewCell return cell } } // MARK: - Collection View Custon Cell final class ConversationCollectionViewCell: UICollectionViewCell, DTAttributedTextContentViewDelegate { var mainCellContainerView = UIView() var attributedTextContentView = DTAttributedTextContentView() //MARK: - LIFECYCLE override init(frame: CGRect) { super.init(frame: frame) setupmainCellContainerView() setupAttributedTextContentView() layoutIfNeeded() } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } // MARK: - UI STEUP private func setupmainCellContainerView() { contentView.addSubview(mainCellContainerView) mainCellContainerView.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ mainCellContainerView.topAnchor.constraint(equalTo: contentView.topAnchor), mainCellContainerView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor), mainCellContainerView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor), mainCellContainerView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor), ]) } private func setupAttributedTextContentView() { mainCellContainerView.addSubview(attributedTextContentView) attributedTextContentView.backgroundColor = .systemIndigo attributedTextContentView.delegate = self attributedTextContentView.sizeToFit() let attributedString = NSAttributedString(string: "Simple message for testing purpose @", attributes: [ .font: UIFont(name: "HelveticaNeue", size: 17), .foregroundColor: UIColor.white, .paragraphStyle: { let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = .left paragraphStyle.lineBreakMode = .byWordWrapping return paragraphStyle }() ]) attributedTextContentView.attributedString = attributedString attributedTextContentView.contentMode = .redraw attributedTextContentView.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ attributedTextContentView.widthAnchor.constraint(lessThanOrEqualToConstant: 260), attributedTextContentView.topAnchor.constraint(equalTo: mainCellContainerView.topAnchor), attributedTextContentView.bottomAnchor.constraint(equalTo: mainCellContainerView.bottomAnchor), ]) } }

I have this ToastView that will animate by expanding the height from the top of the screen. All the components are created programmatically. This is the code: final class ToastView: UIView { private static let instance = createContainer() private let labelHeightOffset: CGFloat = 32 private let messageLabel: UILabel = { let label = UILabel() label.textAlignment = .center label.numberOfLines = 0 return label }() private var heightConstraint: NSLayoutConstraint! static func show(message: String) { let keyWindow = UIWindow.getKeyWindow() //extension to get the kley window show(on: keyWindow, message: message) } private static func show(on parentView: UIView? = nil, message: String) { guard let parentView = parentView ?? UIViewController.getTopViewController()?.view, instance.superview == nil, let toast = toast else { return } parentView.addSubview(instance, method: .fill) toast.messageLabel.text = message toast.messageLabel.textColor = .red toast.messageLabel.textAlignment = .center toast.messageLabel.sizeToFit() toast.show(for: 3) } private func show(for duration: TimeInterval = 0) { isHidden = false layoutIfNeeded() UIView.animate(withDuration: 0.4, animations: { let labelLineHeight = self.messageLabel.getRect(maxLine: 3).size.height //getRect is an extension func to get the rect based on the content of the label let lineSpaces = CGFloat((self.messageLabel.getLineNumber() - 1) * 2) //getLineNumber is an extension func to get the total number of lines based on the content //Get the height by the content of the label self.heightConstraint.constant = self.labelLineHeight + self.labelHeightOffset + lineSpaces self.setNeedsUpdateConstraints() self.superview?.layoutIfNeeded() }, completion: { _ in self.hide(delay: duration) }) } private func hide(delay: TimeInterval = 0) { UIView.animate(withDuration: 0.4, delay: delay, animations: { self.heightConstraint.constant = 0 self.setNeedsUpdateConstraints() self.superview?.layoutIfNeeded() }, completion: { _ in self.isHidden = true self.messageLabel.text = nil ToastView.instance.removeFromSuperview() }) } } private extension ToastView { static var toast: ToastView? { return instance.subviews[0] as? ToastView } static func createContainer() -> UIView { let container = UIView(frame: .zero) container.backgroundColor = .clear let toast = ToastView(frame: .zero) toast.backgroundColor = .white toast.addCorner(radius: 8) container.addSubview(toast) toast.layoutMessageLabel() toast.layoutToast() return container } func layoutMessageLabel() { addSubview(messageLabel) messageLabel.center = center messageLabel.translatesAutoresizingMaskIntoConstraints = false let constraints = [ centerYAnchor.constraint(equalTo: messageLabel.centerYAnchor), leftAnchor.constraint(equalTo: messageLabel.leftAnchor, constant: 16), rightAnchor.constraint(equalTo: messageLabel.rightAnchor, constant: 16) ] NSLayoutConstraint.activate(constraints) messageLabel.setNeedsUpdateConstraints() layoutIfNeeded() } func layoutToast() { translatesAutoresizingMaskIntoConstraints = false let topConstants: CGFloat = UIWindow.getKeyWindow()?.safeAreaInsets.top ?? 0 + 16 let topConstraint = topAnchor.constraint(equalTo: superview!.topAnchor, constant: topConstants) heightConstraint = heightAnchor.constraint(equalToConstant: 0) let constraints = [ topConstraint, heightConstraint!, leftAnchor.constraint(equalTo: superview!.leftAnchor, constant: 16), superview!.rightAnchor.constraint(equalTo: rightAnchor, constant: 16) ] NSLayoutConstraint.activate(constraints) setNeedsUpdateConstraints() superview!.layoutIfNeeded() } } The code is working fine EXCEPT for the first time it appears. It always animates from the bottom of the screen and rising above ot the top. But if you'll have a look at the code, I only animte the heightConstraint's constant value. Why is this happening? Can you help me fix this? thanks.

I am developing an iOS app using SwiftUI and have encountered an Auto Layout constraint conflict issue that appears when tapping on a TextField within a LoginView. I've tried several troubleshooting steps but haven't been able to resolve it. Error Message: 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. ( "<NSLayoutConstraint:0x6000021298b0 'accessoryView.bottom' _UIRemoteKeyboardPlaceholderView:0x10460dd10.bottom == _UIKBCompatInputView:0x1059220e0.top (active)>", "<NSLayoutConstraint:0x60000217a620 'assistantHeight' SystemInputAssistantView.height == 45 (active, names: SystemInputAssistantView:0x10591ce60 )>", "<NSLayoutConstraint:0x60000217d090 'assistantView.bottom' SystemInputAssistantView.bottom == _UIKBCompatInputView:0x1059220e0.top (active, names: SystemInputAssistantView:0x10591ce60 )>", "<NSLayoutConstraint:0x60000217d040 'assistantView.top' V:[_UIRemoteKeyboardPlaceholderView:0x10460dd10]-(0)-[SystemInputAssistantView] (active, names: SystemInputAssistantView:0x10591ce60 )>" ) Will attempt to recover by breaking constraint <NSLayoutConstraint:0x60000217d040 'assistantView.top' V:[_UIRemoteKeyboardPlaceholderView:0x10460dd10]-(0)-[SystemInputAssistantView] (active, names: SystemInputAssistantView:0x10591ce60 )> This error appears in the console when I click on the TextField in my LoginView while running the code on a simulation. The app doesn't crash, but the console indicates there is a constraint conflict related to the keyboard. Here's my LoginView: struct LoginView: View { @StateObject var viewModel = LoginViewModel() var body: some View { NavigationStack { VStack { Spacer() Image("logo") .resizable() .scaledToFit() .frame(width: 150, height: 100) VStack { TextField("Enter your email", text: $viewModel.email) .autocapitalization(/*@START_MENU_TOKEN@*/.none/*@END_MENU_TOKEN@*/) .modifier(TextFieldModifier()) SecureField("Enter your password", text: $viewModel.password) .modifier(TextFieldModifier()) } Button { print("Show forgot password") } label: { Text("Forgot Password") .font(.footnote) .fontWeight(.semibold) .padding(.top) .padding(.trailing, 20) } .frame(maxWidth: .infinity, alignment: .trailing) Button { Task { try await viewModel.signIn() } } label: { Text("Login") .font(.subheadline) .fontWeight(.semibold) .foregroundColor(.white) .frame(width: 360, height: 44) .background(Color(.black)) .cornerRadius(8) } .padding(.vertical) HStack { Rectangle() .frame(width: (UIScreen.main.bounds.width / 2) - 40, height: 0.5) Text("OR") .font(.footnote) .fontWeight(.semibold) .foregroundColor(.gray) Rectangle() .frame(width: (UIScreen.main.bounds.width / 2) - 40, height: 0.5) } .foregroundColor(.gray) HStack { Image("facebook_logo") .resizable() .frame(width: 20, height: 20) Text("Continue with Facebook") .font(.footnote) .fontWeight(.semibold) .foregroundColor(Color(.systemBlue)) } .padding(.top, 8) Spacer() Divider() NavigationLink { AddEmailView() .navigationBarBackButtonHidden(true) } label: { HStack (spacing: 3) { Text("Don't have an account?") Text("Sign Up") .fontWeight(.semibold) } .font(.footnote) } .padding(.vertical, 16) } } } } #Preview { LoginView() } And my TextFieldModifier: struct TextFieldModifier: ViewModifier { func body(content: Content) ->some View { content .font(.subheadline) .padding(12) .background(Color(.systemGray6)) .cornerRadius(10) .padding(.horizontal, 24) .padding(.top) } } Attempts to Resolve: I've checked the TextFieldModifier for any potential issues but it seems standard. I've tried simplifying the view by removing other elements, but the issue persists. The issue seems to occur regardless of the simulator device or iOS version I use. Questions: What could be causing this Auto Layout constraint conflict in a SwiftUI app? Are there any known issues with SwiftUI's TextField and keyboard interactions that might lead to such constraints issues? Any suggestions on how to debug or resolve this constraint conflict?

Before iOS 17 beta, the .pickerStyle(.segmented) modifier makes the Picker take up the entire available width in a toolbar. In iOS 17, it tightly fits the width of the text. I can use .fixedSize() modifier to make the segmented control tightly fit the content. In reverse, what is the recommended way to make it expand to fill the whole width? In iOS 17 beta, I tried .frame(idealWidth: UIScreen.main.bounds.width) and it works, but it doesn't have effect in iOS 16 and prior. Also, it is semantically wrong to set the ideal width to an arbitrary big value. Example: iOS 16, full iOS 17, tight

I am a new uikit developer. I have a problem on my app. App has 2 different parts. Rectangle view and button. Rectangle view can drag with pan touch gesture. Button can change own image with tap gestures. When user taps the button, it changes own image. But when I tap the button, rectangle view moves to the at the beginning position.(view did load position). I checked logs and I see viewDidLayout methods calling when I tap the button. How can I handle this problem, is there anyone help me ? Thanks a lot. import UIKit final class SampleViewController: UIViewController { private var isTapped: Bool = false let button: UIButton = { let button = UIButton() let image = UIImageView(image: UIImage(systemName: "play")) button.translatesAutoresizingMaskIntoConstraints = false button.backgroundColor = .yellow return button }() let littleView: UIView = { let view = UIView() view.translatesAutoresizingMaskIntoConstraints = false view.layer.borderColor = UIColor.red.cgColor view.layer.borderWidth = 4 view.isUserInteractionEnabled = true view.backgroundColor = .red return view }() override func viewDidLoad() { super.viewDidLoad() self.view.addSubview(button) self.view.addSubview(littleView) littleView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(handlePan(_:)))) button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside) NSLayoutConstraint.activate([ button.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor), button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor), littleView.heightAnchor.constraint(equalTo: self.view.heightAnchor, multiplier: 1/5), littleView.widthAnchor.constraint(equalTo: self.view.heightAnchor, multiplier: 1/3), ]) } override func viewDidLayoutSubviews() { littleView.frame = CGRect(x: 0, y: 0, width: littleView.frame.width, height: littleView.frame.height) } override func viewWillLayoutSubviews() { littleView.frame = CGRect(x: 0, y: 0, width: littleView.frame.width, height: littleView.frame.height) } @objc private func buttonTapped() { button.setImage(UIImage(systemName: isTapped ? "play.slash" : "play"), for: .normal) self.view.layoutIfNeeded() isTapped.toggle() print("Button tapped") } @objc private func handlePan(_ gesture: UIPanGestureRecognizer) { guard let viewToMove = gesture.view else { return } if gesture.state == .began || gesture.state == .changed { let translation = gesture.translation(in: view) let newX = max(0, min(view.frame.width - viewToMove.frame.width, viewToMove.frame.origin.x + translation.x)) let newY = max(0, min((view.frame.height - viewToMove.frame.height), viewToMove.frame.origin.y + translation.y)) viewToMove.frame.origin = CGPoint(x: newX, y: newY) gesture.setTranslation(CGPoint.zero, in: view) } } } Github link

I am looking for some older WWDC sessions, for example "High Performance Auto Layout". It was available month ago by link https://developer.apple.com/videos/play/wwdc2018/220/. Now the session is unavailable, and there are only few left from WWDC2018. The same issue I experience with some other WWDC sessions. Why does Apple remove older sessions? And where can I find them?

I have facing issue related design. It's work fine when I run from Xcode and then killed the app and reopened app it breaks the design in some screens. Here, I have attached a video link for your reference. https://drive.google.com/file/d/1-bZMA59UyrquPB5l1C6DkC9XLZSc_zgP/view?usp=share_link

Hi All, Our crash reporting solution show app crashes for the user with crash reports which are not getting symbolicating to anything useful. it just says, App crashed on thread 0 (CoreAutoLayout -[NSISEngine negativeErrorVarForBrokenConstraintWithMarker:errorVar:] with it ending up on main.swift file. We have not able to replicate at our end, and it is happening only for a small fraction of our user (&lt; 1%). This issue is spread across multiple iOS versions and device models. We have verified all our UI actions are being done on main thread. Any pointers for solving this are welcome. Regards, Ishan

We’re attempting to use UICollectionView compositional layout to describe a section layout, but it’s giving us some trouble. What we’d like to achieve: A total of 7 cells 3 cells stacked, each 30% height and 100% width, with orthogonal scrolling to see the next 3 When the user reaches the last cell, it would be 100% height and 100% width of the container. ASCII art and screenshots of the imperfect example are below. Our starting point was Apple’s example code, specifically OrthogonalScrollingViewController, but what we’ve found is if we expand the widths there, the height settings seem to longer be respected. The most basic version of a layout that we tried is this: func createLayout() -> UICollectionViewLayout { let layout = UICollectionViewCompositionalLayout { (sectionIndex: Int, layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? in // Small items at roughly 30% of the container height. let smallItem = NSCollectionLayoutItem( layoutSize: NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(0.3) ) ) // The large item should be 100% of the container width. let largeItem = NSCollectionLayoutItem( layoutSize: NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0) ) ) // We want 3 items to appear stacked with orthogonal scrolling. let smallItemGroup = NSCollectionLayoutGroup.vertical( layoutSize: NSCollectionLayoutSize( widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0) ), subitem: smallItem, count: 3 ) let containerGroup = NSCollectionLayoutGroup.horizontal( layoutSize: NSCollectionLayoutSize( widthDimension: .fractionalWidth(1), heightDimension: .fractionalHeight(0.5) ), subitems: [smallItemGroup, largeItem] ) let section = NSCollectionLayoutSection(group: containerGroup) section.orthogonalScrollingBehavior = .paging return section } return layout } We’ve tried many variations of nested groups and using the .vertical and .horizontal initializers, but each of them has the same result: The last cell is always the same size as all the others. // +------------------------------+ These would be off-screen // | +-------------------------+ | +-------------------------+ +-------------------------+ // | | 1 | | | 4 | | | // | +-------------------------+ | +-------------------------+ | | // | +-------------------------+ | +-------------------------+ | | // | | 2 | | | 5 | | 7 | // | +-------------------------+ | +-------------------------+ | | // | +-------------------------+ | +-------------------------+ | | // | | 3 | | | 6 | | | // | +-------------------------+ | +-------------------------+ +-------------------------+ // | | // | | // | | // | rest of the screen | // | | // | | // | | // | | // +------------------------------+ The last cell in the third screenshot, (0,6), is the one we want 100% height of the section. Is there a way to achieve this layout where the last cell is 100% of the section height?

What might be a good way to constrain a view's top anchor to be just at the edge of a device's Face ID sensor housing if it has one? This view is a product photo that would be clipped too much if it ignored the top safe area inset, but if it was positioned relative to the top safe area margin this wouldn't be ideal either because of the slight gap between the sensor housing and the view (the view is a photo of pants cropped at the waist). What might be a good approach here?

** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Not possible to remove variable: 400: unknown var (bug!) with engine as delegate:0x283c8ed40{id: 33112} colIndex:32 from engine NSISEngine: 0x129248130{ delegate:0x12934eaa0 EngineVars:  0: objective{id: 33102} rowIndex:0  1: UIImageView:0x12924ec90.Height{id: 32592} rowIndex:1073741824  2: 0x280a04be0.marker{id: 32591} colIndex:1073741825  3: UIImageView:0x12924ec90.Width{id: 32807} rowIndex:1  4: 0x280dc35a0.posErrorMarker{id: 32871} colIndex:1  5: 0x280dc35a0.negError{id: 32872} rowIndex:88  6: 0x280dc3d80.posErrorMarker{id: 32873} colIndex:1073741826  7: 0x280dc3d80.negError{id: 32874} rowIndex:1073741825  8: UIImageView:0x129353f00.Width{id: 32594} rowIndex:2  9: 0x280979d60.marker{id: 32593} colIndex:3 10: 0x280dc1e60.posErrorMarker{id: 32875} colIndex:4 11: 0x280dc1e60.negError{id: 32876} rowIndex:3 12: UIImageView:0x129353f00.Height{id: 32822} rowIndex:1073741826 13: 0x280dc39c0.posErrorMarker{id: 32877} colIndex:1073741827 14: 0x280dc39c0.negError{id: 32878} rowIndex:1073741898 15: UIButton:0x1293540d0.Width{id: 32817} rowIndex:4 16: 0x280dc2040.posErrorMarker{id: 32879} rowIndex:93 17: 0x280dc2040.negError{id: 32880} colIndex:6 18: UIButton:0x1293540d0.Height{id: 32820} rowIndex:1073741827 19: 0x280dc3de0.posErrorMarker{id: 32881} rowIndex:96 20: 0x280dc3de0.negError{id: 32882} colIndex:1073741830 21: UILabel:0x129353300.Width{id: 32811} rowIndex:5 22: 0x280dc3e40.posErrorMarker{id: 32883} colIndex:44 23: 0x280dc3e40.negError{id: 32884} rowIndex:90 24: UILabel:0x129353300.Height{id: 32842} colIndex:1073741828 25: 0x280dc27c0.posErrorMarker{id: 32885} colIndex:1073741831 26: 0x280dc27c0.negError{id: 32886} rowIndex:1073741828 27: UILabel:0x129353c90.Width{id: 32840} rowIndex:6 28: 0x280dc1da0.posErrorMarker{id: 32887} colIndex:9 29: 0x280dc1da0.negError{id: 32888} rowIndex:97 30: UILabel:0x129353c90.Height{id: 32829} colIndex:1073741832 31: 0x280dc31e0.posErrorMarker{id: 32889} colIndex:1073741833 32: 0x280dc31e0.negError{id: 32890} rowIndex:1073741900 33: UIImageView:0x12934e490.Width{id: 32596} rowIndex:1073741905 34: UIImageView:0x12934e490.Height{id: 32597} colIndex:1073741844 35: 0x280963a70.marker{id: 32595} colIndex:11 36: 0x280dc2ee0.posErrorMarker{id: 32891} colIndex:12 37: 0x280dc2ee0.negError{id: 32892} rowIndex:8 38: 0x280dc1d40.posErrorMarker{id: 32893} colIndex:1073741835 39: 0x280dc1d40.negError{id: 32894} rowIndex:1073741830 40: UIButton:0x1293543b0.Width{id: 32832} rowIndex:9 41: 0x280dc1440.posErrorMarker{id: 32895} colIndex:0 42: 0x280dc1440.negError{id: 32896} rowIndex:1073741845 43: UIButton:0x1293543b0.Height{id: 32827} rowIndex:1073741831 44: 0x280dc3840.posErrorMarker{id: 32897} colIndex:1073741836 45: 0x280dc3840.negError{id: 32898} rowIndex:1073741829 46: UILabel:0x129353a20.Width{id: 32848} rowIndex:10 and another thousand or so lines. this crash occurs after I change the language and open the workout page to start a workout immediately, and sometimes on the second time, I open the workout page.