Bringing my iPad app to Mac Catalyst as iPad idiom. Primary interface is a UISplitViewController. Two things I think are bugs unless someone replies with a fix. SplitViewController is setup in two column with left column as sidebar: split.setViewController(primary, for: .primary) split.setViewController(secondary, for: .secondary) split.preferredDisplayMode = .oneBesideSecondary split.preferredSplitBehavior = .tile split.presentsWithGesture = true #if targetEnvironment(macCatalyst) split.primaryBackgroundStyle = .sidebar split.displayModeButtonVisibility = .never #endif The displayMode button aligns vertically with the navigation bar and below the 3 window control buttons (close, minimize, full screen), whereas on other macOS apps using SplitViewController such as Apple Notes app, the displayMode button aligns vertically and just to the right of the the 3 window control buttons (close, minimize, full screen). I downloaded the Apple Example app called Menus that is supposed to be a prime example of a Mac Catalyst app, and I see author must have faced the same bug and instead created their own displayMode button and placed it on the UITitlebar's toolBar. In my secondary ViewController which is a subclass of a UITableViewController, tapping a row, calls show and in a SplitViewController, that pushes another detailVC onto the Nav stack as expected. The UIWindowScene's UITitlebar which appears over the top of the secondary VC looks correct. This detailVC is a subclass of a UITableViewController. Finally, tapping a row in the table of the detailVC calls show but this time, the ViewController is actually a UIHostingViewController wrapping a SwiftUI View. At this point the UIWindowScene's UITitlebar changes appearance and takes on the same lightened color similar to the sidebar (primary) appearance. With UITitlebarTitleVisibility set to hidden and if I set the titlebar.toolbar to nil, (which removes the UITitlebar, there is no appearance issue. Running on iPad, with no UITitlebar, there is no odd lightening experienced when the UIHostingController is shown. I think this has something to do with the UIHostingController within Mac Catalyst.

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 have a SwiftUI view that I have wrapped using UIHostingController for use within UIKit. Requirement: Within the UIKit environment, I want to get all the subviews of this SwiftUI view and determine whether the images within those subviews have finished loading. For UIKit views, we can use view.subviews to get all the subviews and do the check. However, for SwiftUI views, I found that the view.subviews turns out to be an empty array, making it impossible to do further checks. So the question is How can I get the subviews of a SwiftUI view?

When we place a Button inside a ScrollView , the fade animation of the button is delayed, so most users won't see it I think. You can see this in the trivial example struct ContentView: View { var body: some View { ScrollView { Button { // empty } label: { Text("Fade animation test") } } } } Is there any way to opt out of this behavior? In UIKit, this was also the default behavior, but you could always change it by overriding touchesShouldCancel method. I think I can probably do that by rewriting an animation completely with some custom ButtonStyle or by rewriting a Button component completely, but it doesn't seem like a good solution to me, as I want the native look and feel (in case of button animation it is pretty easy to mimic though). And also for some components, like lists, Apple has already implemented the correct behavior by themselves somehow.

iPhone16ProMax 通过[UIScreen mainScreen].bounds.size获取屏幕宽高 使用XCode15获取屏幕宽高为430 * 930 使用XCode16获取屏幕宽高为440 * 956 这是为什么？

My Objective-C Catalyst app when built with Xcode 16.x/iOS 18 does not have a visible Tab Bar when run on Sequoia. App starts up in first tab, but there is no way to access other tabs. The same app when run on macOS Sonoma (or macOS Catalina) has a normal Tab Bar. The app has an initial View UITabBarController with 3 tabs. The main tab is a UiSplitViewController. Minimum macOS deployment 10.5. If app is built on Sonoma with Xcode 15.x/iOS 17 the Tab Bar is normal on macOS Sonoma, Sequoia, and Catalina. I've tried without success: if (@available(macCatalyst 18.0, *)) { self.tabBarController.tabBarHidden = false; } else { // Fallback on earlier versions } I wonder if this console log message has anything to do with the problem: CLIENT OF UIKIT REQUIRES UPDATE: This process does not adopt UIScene lifecycle. This will become an assert in a future version.

I’m building a macOS app using SwiftUI with a WindowGroup(id: "rootWindow") for the main UI. The app shows a countdown timer, and the timer continues to run even after the user closes the main window (clicks the red "X"). When the timer reaches 0, I want to automatically reopen that window and bring the app to the front. I’m currently using the following code to bring the app to the foreground and show the window when the app is still open (but not focused/resign active state): NSApp.activate(ignoringOtherApps: true) NSApp.windows.forEach { window in if window.identifier?.rawValue.starts(with: "rootWindow") { window.makeKeyAndOrderFront(nil) } } However, this doesn’t work when the window has been closed. At that point, NSApp.windows no longer contains my SwiftUI window, and I have no reference to recreate or reopen it. I also cannot use openWindow environment value as it requires a view. How can I programmatically reopen a SwiftUI WindowGroup window after it’s been closed, without requiring any user interaction (like clicking the Dock icon)?

Hi, I've got an app that displays markdown in UITextView / NSTextView. I would like it to behave like Notes app does, that is if user types the line start modifier, e.g: "# " or "> " I would like the keyboard to show a capitalized letters. I've tried looking into overriding insertText - and it breaks the predictive text (can not insert white space). I've tried implementing UITextInputTokenizer but no luck either. Like I said, I see the Notes app does it perfectly, so maybe I'm missing something obvious or there is a way to do it without interrupting the auto-correction and predictive text. Ideally same thing can be applied to the NSTextView as the app support both platforms.

Let's say you have a protocol that can work with both classes and structs but you want to have a uniform UI to make edits. What is the recommended way to have one view that will take both? App import SwiftUI @main struct ObservationTesterApp: App { var body: some Scene { WindowGroup { ContentView(existence: Existence()) } } } Types import Foundation protocol Dateable { var timestamp:Date { get set } } struct Arrival:Dateable { var timestamp:Date } @Observable class Existence:Dateable { var timestamp:Date init(timestamp: Date) { self.timestamp = timestamp } } extension Existence { convenience init() { self.init(timestamp: Date()) } } ContentView, etc // // ContentView.swift // ObservationTester // // import SwiftUI struct EditDateableView<TimedThing:Dateable>:View { @Binding var timed:TimedThing //note that this currently JUST a date picker //but it's possible the protocol would have more var body:some View { DatePicker("Time To Change", selection: $timed.timestamp) } } #Preview { @Previewable @State var tt = Arrival(timestamp: Date()) EditDateableView<Arrival>(timed: $tt) } struct ContentView: View { @State var arrival = Arrival(timestamp: Date()) @Bindable var existence:Existence var body: some View { //this work around also not allowed. "self is immutable" // let existBinding = Binding<Existence>(get: { existence }, set: { existence = $0 }) VStack { EditDateableView(timed: $arrival) //a Binding cant take a Bindable //EditDateableView<Existence>(timed: $existence) } .padding() } } #Preview { ContentView(existence: Existence()) }

I'm working on a macOS application that needs to query the list of available printers using NSPrinter.printerNames. For performance reasons, I'd like to perform this operation on a background thread. However, since NSPrinter is part of AppKit, and AppKit is generally not thread-safe unless explicitly stated, I want to confirm: Is it safe to call NSPrinter.printerNames from a background thread? I couldn’t find explicit guidance in the documentation regarding the thread-safety of printerNames, so any clarification or best practices would be appreciated. Thanks in advance! Note: I tested this api on a background thread in code and it did not give any error.

Hi, I'm embedding the QLPreviewController in a UIViewControllerRepresentable. When I view .usdz models I don't see the AR/Object selector at the top, nor the sharing button. I have tried presenting modally with a .sheet modifier and had the same result. What do I need to do to get the controls? Thanks, code attached. Code Spiff

I have a class: class MyDockTilePlugin: NSObject, NSDockTilePlugIn { func setDockTile(_ dockTile: NSDockTile?) { return } func dockMenu() -> NSMenu? { let menu = NSMenu() let it = NSMenuItem(title: "choose me!", action: #selector(self.selectDMIP(_:)), keyEquivalent: "") it.target = self menu.addItem(it) return menu } @objc func selectDMIP(_ sender: NSMenuItem) { print("you selected me!") } } and I follow the instructions to put it in a Bundle and copy it into the main app. I run the main app. Change the Dock options to Keep in Dock. Quit the main app. Right-click the Dock icon. I get the menu, but when selected, it never prints "you selected me!" What I do see after selecting the menu item is the plugin class reloading. Any ideas how to capture the menu item selection?

Our iOS app, when running as an iOS App on Mac, crashes consistently under the following scenario: 1. Launch the app on an external display. 2. Minimize the app window. 3. Disconnect the external display. The app crashes every time under these conditions. The crash log shows the following call stack: *** Assertion failure in -[UINSWorkspace _maximumContentSizeForWindowOnScreen:], UINSWorkspace.m:401 -[UINSWorkspace _maximumContentSizeForWindowOnScreen:]: screen parameter should not be nil ( 0 CoreFoundation 0x000000018e841df0 __exceptionPreprocess + 176 1 libobjc.A.dylib 0x000000018e306b60 objc_exception_throw + 88 2 Foundation 0x000000018fb6aa78 -[NSCalendarDate initWithCoder:] + 0 3 UIKitMacHelper 0x00000001a9a59110 -[UINSWorkspace _maximumContentSizeForWindowOnScreen:] + 184 4 UIKitMacHelper 0x00000001a9a3e748 -[UINSSceneViewController _usableScreenSizeWithSceneSize:shouldOverride:] + 412 5 UIKitMacHelper 0x00000001a9a3d55c -[UINSSceneViewController _effectiveScaleFactorForLayoutWithOverride:] + 88 6 UIKitMacHelper 0x00000001a9a3f3a8 -[UINSSceneViewController _updateZoomFactors] + 28 7 UIKitMacHelper 0x00000001a9a3f248 -[UINSSceneViewController _updateZoomFactorsAndDoLayout] + 24 8 UIKitMacHelper 0x00000001a9a3df80 -[UINSSceneViewController _doUpdates:] + 104 9 UIKitMacHelper 0x00000001a99ad460 -[UINSSceneViewController observeValueForKeyPath:ofObject:change:context:] + 176 10 Foundation 0x000000018facb0d8 -[NSKeyValueObservance observeValueForKeyPath:ofObject:change:context:] + 388 11 Foundation 0x000000018facb0d8 -[NSKeyValueObservance observeValueForKeyPath:ofObject:change:context:] + 388 12 Foundation 0x000000018fa8f7b4 NSKeyValueNotifyObserver + 252 13 Foundation 0x000000018fb3c560 NSKeyValueDidChange + 388 14 Foundation 0x00000001903149a0 NSKeyValueDidChangeWithPerThreadPendingNotifications + 160 15 AppKit 0x00000001924673d4 -[NSThemeFrame _didChangeContentLayoutRect] + 76 16 AppKit 0x000000019246521c -[NSWindow _oldPlaceWindow:fromServer:] + 744 ) It seems like the system attempts to access a screen object that is already nil after the external monitor is removed. This leads to an assertion failure in UINSWorkspace. Is there any known workaround or update planned to address this issue? Thank you.

Hi I am building a simple multi column CollectionView here and trying to add 3 cell in a row. Well, in short the column and rows looks all fine if I comment the below code. which is no image and text assigned to cells. let framework = list[indexPath.item] cell.configure(framework) However, once uncommented, only a single cell is displayed per row and the image doesn't seem to be resizing automatically. Can you please advise. Below is the ViewController. import UIKit class FrameworkListViewController: UIViewController { @IBOutlet weak var collectionView: UICollectionView! let list: [AppleFramework] = AppleFramework.list override func viewDidLoad() { super.viewDidLoad() collectionView.dataSource = self collectionView.delegate = self } } extension FrameworkListViewController: UICollectionViewDataSource { func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return list.count } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "FrameworkCell", for: indexPath) as? FrameworkCell else { return UICollectionViewCell() } let framework = list[indexPath.item] cell.configure(framework) return cell } } extension FrameworkListViewController: UICollectionViewDelegateFlowLayout { func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let interItemSpacing: CGFloat = 10 let width = (collectionView.bounds.width - interItemSpacing * 2) / 3 let height = width * 1.5 return CGSize(width: width, height: height) } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat { return 10 } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat { return 10 } } This is Cell class FrameworkCell: UICollectionViewCell { @IBOutlet weak var thumbnailImageView: UIImageView! @IBOutlet weak var nameLabel: UILabel! func configure(_ framework: AppleFramework) { thumbnailImageView.image = UIImage(named: framework.imageName) nameLabel.text = framework.name } }

DESCRIPTION OF PROBLEM When using SwiftUI’s TextField or TextEditor on iPadOS, a persistent gray or default system material bar appears at the bottom of the screen. This gray bar is not present in Apple’s native apps (such as Notes, Mail, Messages) or in third-party apps like ChatGPT and Beeper STEPS TO REPRODUCE Create a TextField or TextEditor. Run the code, click on it, without software keyboard enabled.

i am trying to get my app clip invocated through URL. i only have testflight app clip now and its not published to production. i added in test flight app clip url invocation

I have an iOS app where I'm trying to paste something previously copied to the user's UIPasteboard. I came across the UIPasteControl as an option for a user to tap to silently paste without having the prompt "Allow Paste" pop up. For some reason, despite having what seemingly is the correct configurations for the UIPasteControl, on testing a tap, nothing is called. I expected override func paste(itemProviders: [NSItemProvider]) to fire, but it does not. Any help would be appreciated as there doesn't seem to be much info anywhere regarding UIPasteControl. import UniformTypeIdentifiers class ViewController: UIViewController { private let pasteControl = UIPasteControl() override func viewDidLoad() { super.viewDidLoad() view.backgroundColor = .systemBackground pasteControl.target = self pasteConfiguration = UIPasteConfiguration(acceptableTypeIdentifiers: [ UTType.text.identifier, UTType.url.identifier, UTType.plainText.identifier ]) view.addSubview(pasteControl) pasteControl.translatesAutoresizingMaskIntoConstraints = false NSLayoutConstraint.activate([ pasteControl.centerXAnchor.constraint(equalTo: view.centerXAnchor), pasteControl.centerYAnchor.constraint(equalTo: view.centerYAnchor), ]) } } extension ViewController { override func paste(itemProviders: [NSItemProvider]) { for provider in itemProviders { if provider.hasItemConformingToTypeIdentifier(UTType.url.identifier) { provider.loadObject(ofClass: URL.self) { [weak self] reading, _ in guard let url = reading as? URL else { return } print(url) } } else if provider.hasItemConformingToTypeIdentifier(UTType.plainText.identifier) { provider.loadObject(ofClass: NSString.self) { [weak self] reading, _ in guard let nsstr = reading as? NSString else { return } let str = nsstr as String if let url = URL(string: str) { print(url) } } } } } }

I have a macOS application developed in SwiftUI. It's a document-based application. I know how to hide the Show Tab Bar command under View. I don't want to hide it. I always want to show tabs. I wonder how to enable this command programmatically such that the document window always has the + button to the right. Thanks.

I'm wondering what the correct, or recommended, way is to dismiss a SwiftUI that is being presented as a sheet hosted by an NSHostingController. The usual technique of invoking @Environment(\.dismiss) does not appear to work. Consider the code below. An NSWindowController is attempting to display a SwiftUI SettingsView as a sheet. The sheet is correctly presented, but the SettingsView is unable to dismiss itself. I am able to make it work by passing a closure into SettingsView that calls back to the NSWindowController but it's rather convoluted because SettingsView doesn't know the view controller that's hosting it until after SettingsView has been created, which means "finding" that view controller in the window controller to dismiss is more involved than it should be. Is there a better strategy to leverage here? final class MyViewController: NSViewController { @IBAction func buttonClicked(_ sender: NSButton) { if let presenter = window?.contentViewController { presenter.presentAsSheet(NSHostingController(rootView: SettingsView())) } } } struct SettingsView: View { @Environment(\.dismiss) private var dismiss var body: some View { VStack { Button("Cancel", role: .cancel) { dismiss() // This call does not dismiss the sheet. } .keyboardShortcut(.cancelAction) } } } Thank you. macOS 15.4.1 (24E263), Xcode 16.3 (16E140)

Hi Everybody, I am actually developing dynamic shortcuts for my app. I have a problem with the class UIApplicationShortcutIcon. When I pass a personalized icon in the parameter icon as a UIApplicationShortcutIcon(templateImageName: "nameOfTheAsset" I always visualize a black dot instead of my Icon. The icon is imported as .SVG file and rendered as a template. Sincerely I do not know what to do to solve this problem since the documentation is little. Hoping somebody can give some tips to solve the problem