When calling DispatchQueue.main.async or DispatchQueue.main.sync with a call to self without capturing self, I get a compiler error: Call to method 'asd' in closure requires explicit use of 'self' to make capture semantics explicit Since I usually use DispatchQueue.main.async, I'm now used to solving this error by capturing self like this: DispatchQueue.main.async { [self] in asd() } But this unfortunately doesn't seem to work with DispatchQueue.main.sync: DispatchQueue.main.async { [self] in asd() } This gives the compiler warning: Call to method 'asd' in closure requires explicit use of 'self' to make capture semantics explicit; this is an error in Swift 6 This warning only appears for DispatchQueue.main.sync and not for DispatchQueue.main.async. Why? How can I avoid having to prefix every method call with self. in this case?

In my app I use NSMenu.popUp(positioning:at:in:) for displaying a menu in response to the user clicking a button. But it seems that when the menu is opened inside a modal window, all the menu items are always disabled. Using NSMenu.popUpContextMenu(_:with:for:) instead works. What's the reason and what's the difference between the two methods? According to the documentation, one is for opening "popup menus" and the other for opening "context menus", but I cannot see an explanation of the difference between the two. @main class AppDelegate: NSObject, NSApplicationDelegate { func applicationDidFinishLaunching(_ aNotification: Notification) { let window = NSWindow(contentViewController: ViewController()) NSApp.runModal(for: window) } } class ViewController: NSViewController { override func loadView() { let button = NSButton(title: "Click", target: self, action: #selector(click(_:))) view = NSView(frame: CGRect(x: 0, y: 0, width: 400, height: 400)) view.addSubview(button) } @objc func click(_ sender: Any?) { let menu = NSMenu(title: "") menu.addItem(withTitle: "asdf", action: #selector(asdf(_:)), keyEquivalent: "") menu.addItem(withTitle: "bla", action: nil, keyEquivalent: "") menu.items[0].target = self menu.items[1].target = self // NSMenu.popUpContextMenu(menu, with: NSApp.currentEvent!, for: view) // this works menu.popUp(positioning: nil, at: .zero, in: view) // this doesn't work } @IBAction func asdf(_ sender: Any) { print(0) } }

In TextKit 1 we have the method NSTextStorage.addLayoutManager(_:) that allows to show the same text in multiple text views. This method exists with NSLayoutManager but not with NsTextLayoutManager. Is there a way to achieve the same thing with TextKit 2?

While this isn't an issue directly related with programming, I would like to share my frustration with Apple Care and their knowledge of how App Store and third-party apps work. Perhaps someone at Apple can do something about it. Every now and then a user of one of my apps contacts me asking why they get an error when downloading or updating the app in the App Store ("Unable to Download App. “App” could not be installed. Please try again later."). I tell them that third-party developers have no power over the App Store or its download/update process, and this is an issue they have to solve with Apple Care. But when they contact Apple Care, they are told that since it's an issue with a third-party app, they have to contact the app developer. Sometimes the user is more inclined to believe what Apple Care tells them and they get angry at me. In any case, I feel helpless and frustrated, because I would love to help them, but have no means of doing so. There is something about the concept of App Store that makes some users believe that third-party developers have more power than they actually have: sometimes, for example, users contact me directly, or even leave reviews on the App Store, asking for a refund, which of course only Apple can do. Have you had a similar experience? Can some engineer at Apple instruct Apple Care that third-party developers cannot help with App Store download/update issues, so that App Store users don't get mad at the app developers for not being able to install/update their app?

I'm trying to bind a NSProgressIndicator to Progress, but with the following code I only get an indeterminate progress indicator with a blue bar forever bouncing left and right, even after the two timers fire. According to the documentation: Progress is indeterminate when the value of the totalUnitCount or completedUnitCount is less than zero or if both values are zero. What am I doing wrong? class ViewController: NSViewController { let progress = Progress() override func loadView() { view = NSView(frame: CGRect(x: 0, y: 0, width: 500, height: 500)) let progressIndicator = NSProgressIndicator(frame: CGRect(x: 100, y: 100, width: 100, height: 100)) progressIndicator.bind(.isIndeterminate, to: progress, withKeyPath: "isIndeterminate") progressIndicator.bind(.value, to: progress, withKeyPath: "completedUnitCount") progressIndicator.bind(.maxValue, to: progress, withKeyPath: "totalUnitCount") progressIndicator.startAnimation(nil) view.addSubview(progressIndicator) progress.completedUnitCount = 3 progress.totalUnitCount = 10 Timer.scheduledTimer(withTimeInterval: 1, repeats: false) { _ in print(1) self.progress.completedUnitCount = 6 } Timer.scheduledTimer(withTimeInterval: 6, repeats: false) { _ in print(2) self.progress.completedUnitCount = 0 self.progress.totalUnitCount = 0 } } }

A user of my app, which shows subtitles loaded from a text file above a video loaded from another file, reported that it crashes within minutes of launching it. The user confirmed that the crash only happens when they load a video within the app; if they use it without a video, it doesn't crash. The subtitles are shown in a NSTextView added to AVPlayerView.contentOverlayView. What could cause such a crash? I'm not able to reproduce it. (I tried attaching the full crash report but I always got a validation error "This post contains sensitive language. Please revise it in order to continue.") Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x000000019c50cae8 Termination Reason: Namespace SIGNAL, Code 5 Trace/BPT trap: 5 Terminating Process: exc handler [20614] Application Specific Backtrace 0: 0 CoreFoundation 0x0000000198a472ec __exceptionPreprocess + 176 1 libobjc.A.dylib 0x000000019852e788 objc_exception_throw + 60 2 Foundation 0x0000000199b2caa0 -[NSKeyValueNestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] + 664 3 Foundation 0x0000000199af4e08 -[NSKeyValueUnnestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] + 196 4 Foundation 0x0000000199b8bc54 NSKeyValueDidChange + 200 5 Foundation 0x0000000199acde1c -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 684 6 Foundation 0x0000000199af7484 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 64 7 Foundation 0x0000000199b110e8 _NSSetObjectValueAndNotify + 284 8 AVKit 0x00000001bd3ff694 -[AVPlayerControlsViewController setPlayerController:] + 376 9 Foundation 0x0000000199acddd0 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 608 10 Foundation 0x0000000199af7484 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 64 11 Foundation 0x0000000199b110e8 _NSSetObjectValueAndNotify + 284 12 AVKit 0x00000001bd3c6e68 -[AVPlayerView setPlaybackControlsViewController:] + 88 13 Foundation 0x0000000199b11074 _NSSetObjectValueAndNotify + 168 14 AVKit 0x00000001bd40f4b8 -[AVPlayerView _updatePlaybackControlsViewControllerIfNeeded] + 536 15 AVKit 0x00000001bd3cc0b4 -[AVPlayerView viewDidMoveToWindow] + 136 16 AppKit 0x000000019c24456c -[NSView _setWindow:] + 1788 17 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 18 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 19 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 20 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 ... 35 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 36 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 37 AppKit 0x000000019c428ec0 -[NSWindow dealloc] + 684 38 Foundation 0x000000019a1fa118 _NSKVOPerformWithDeallocatingObservable + 172 39 Foundation 0x0000000199b17404 NSKVODeallocate + 180 40 Foundation 0x0000000199b122f0 empty + 88 41 Foundation 0x0000000199af77fc dealloc + 60 42 Foundation 0x0000000199af7740 -[NSConcreteMapTable dealloc] + 76 43 AppKit 0x000000019c936e80 ___NSTouchBarFinderSetNeedsUpdateOnMain_block_invoke_2 + 1388 44 AppKit 0x000000019c2d4c4c NSDisplayCycleObserverInvoke + 168 45 AppKit 0x000000019c2d48a8 NSDisplayCycleFlush + 644 46 QuartzCore 0x00000001a0bc3f64 _ZN2CA11Transaction19run_commit_handlersE18CATransactionPhase + 120 47 QuartzCore 0x00000001a0bc2d04 _ZN2CA11Transaction6commitEv + 320 48 AppKit 0x000000019c3589d0 __62+[CATransaction(NSCATransaction) NS_setFlushesWithDisplayLink]_block_invoke + 272 49 AppKit 0x000000019cd18208 ___NSRunLoopObserverCreateWithHandler_block_invoke + 64 50 CoreFoundation 0x00000001989d187c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 51 CoreFoundation 0x00000001989d1768 __CFRunLoopDoObservers + 536 52 CoreFoundation 0x00000001989d0d94 __CFRunLoopRun + 776 53 CoreFoundation 0x00000001989d0434 CFRunLoopRunSpecific + 608 54 HIToolbox 0x00000001a317419c RunCurrentEventLoopInMode + 292 55 HIToolbox 0x00000001a3173e2c ReceiveNextEventCommon + 220 ... Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 AppKit 0x19c50cae8 -[NSApplication _crashOnException:] + 240 1 AppKit 0x19c358b44 __62+[CATransaction(NSCATransaction) NS_setFlushesWithDisplayLink]_block_invoke + 644 2 AppKit 0x19cd18208 ___NSRunLoopObserverCreateWithHandler_block_invoke + 64 3 CoreFoundation 0x1989d187c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 4 CoreFoundation 0x1989d1768 __CFRunLoopDoObservers + 536 5 CoreFoundation 0x1989d0d94 __CFRunLoopRun + 776 6 CoreFoundation 0x1989d0434 CFRunLoopRunSpecific + 608 7 HIToolbox 0x1a317419c RunCurrentEventLoopInMode + 292 8 HIToolbox 0x1a3173e2c ReceiveNextEventCommon + 220 9 HIToolbox 0x1a3173d30 _BlockUntilNextEventMatchingListInModeWithFilter + 76 10 AppKit 0x19c22fd68 _DPSNextEvent + 660 11 AppKit 0x19ca25808 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 700 12 AppKit 0x19c22309c -[NSApplication run] + 476 13 AppKit 0x19c1fa2e0 NSApplicationMain + 880 14 Underword 0x102c099ac 0x102c08000 + 6572 15 dyld 0x19856a0e0 start + 2360

In SwiftUI we can use @AppStorage to save app settings. In my app, I have a settings view which allows the user to change various settings. Since there are many of them, it's not practical to declare a binding for each setting between the settings view and whatever other views effectively use that setting. Is there a more convenient way to store a setting in one view and access it in another view?

I'm trying to use @Environment(\.openDocument) private var openDocument but it seems to only be available on macOS. How can I open a document programmatically on iOS? My app has a custom interface for browsing and opening files, so that a tapped file should be shown in the current window, replacing the current file if it exists.

For some time now Xcode has been downloading crash reports from users of my app about crashes related to arrays. One of them looks like this: ... Code Type: ARM-64 Parent Process: launchd [1] User ID: 501 Date/Time: 2024-07-18 14:59:40.4375 +0800 OS Version: macOS 15.0 (24A5289h) ... Crashed Thread: 0 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x00000001045048b8 Termination Reason: Namespace SIGNAL, Code 5 Trace/BPT trap: 5 Terminating Process: exc handler [1771] Thread 0 Crashed: 0 MyApp 0x00000001045048b8 specialized Collection.map<A>(_:) + 596 1 MyApp 0x00000001045011e4 MyViewController.validateToolbarButtons() + 648 (MyViewController.swift:742) ... The relevant code looks like this: class MyViewController { func validateToolbarButtons() { let indexes = tableView.clickedRow == -1 || tableView.selectedRowIndexes.contains(tableView.clickedRow) ? tableView.selectedRowIndexes : IndexSet(integer: tableView.clickedRow) let items = indexes.map({ myArray[$0] }) ... } } The second crash looks like this: ... Code Type: X86-64 (Native) Parent Process: launchd [1] User ID: 502 Date/Time: 2024-07-15 15:53:35.2229 -0400 OS Version: macOS 15.0 (24A5289h) ... Crashed Thread: 0 Exception Type: EXC_BAD_INSTRUCTION (SIGILL) Exception Codes: 0x0000000000000001, 0x0000000000000000 Termination Reason: Namespace SIGNAL, Code 4 Illegal instruction: 4 Terminating Process: exc handler [13244] Thread 0 Crashed: 0 libswiftCore.dylib 0x00007ff812904fc0 _assertionFailure(_:_:flags:) + 288 1 MyApp 0x0000000101a31e04 specialized _ArrayBuffer._getElementSlowPath(_:) + 516 2 MyApp 0x00000001019d04eb MyObject.myProperty.setter + 203 (MyObject.swift:706) 3 MyApp 0x000000010192f66e MyViewController.controlTextDidChange(_:) + 190 (MyViewController.swift:166) ... And the relevant code looks like this: class MyObject { var myProperty: [MyObject] { get { ... } set { let items = newValue.map({ $0.id }) ... } } } What could cause such crashes? Could they be caused by anything other than concurrent access from multiple threads (which I'm quite sure is not the case here, as I only access these arrays from the main thread)?

URLResourecKey.tagNamesKey is only available on macOS, so apparently there's no way of reading or writing file tags on iOS. Why is this the case, given that file tags can be set via Finder on macOS and the Files app on iOS devices? Is there a workaround?

The sample project Filtering Network Traffic uses IPC (NSXPCConnection etc.) to send data from the network extension to the app, but the documentation for NEFilterProvider says The sandbox prevents the Filter Data Provider extension from moving network content outside of its address space by blocking all network access, IPC, and disk write operations. Since my network extension forwards all network traffic to the app so that the user can see it, I was wondering when the app isn’t running and the user shuts down the machine, if the network extension could write the flows it wasn’t able to forward to the app to disk, so that it could read them on the next successful connection to the app. Then almost by accident I read again the documentation and according to the quoted passage a network extension cannot write to disk, but it also cannot use IPC. Is NSXPCConnection not considered IPC, or could the statement that it cannot write to disk be false as well?

All the threads only contain system calls. The crashed thread only contains a single call to my app's code which is main.swift:12. What could cause such a crash? Crash report

Every now and then my SceneKit game app crashes and I have no idea why. The SCNView has a overlaySKScene, so it might also be SpriteKit's fault. The stack trace is #0 0x0000000241c1470c in jet_context::set_fragment_texture(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, jet_texture*) () #27 0x000000010572fd40 in _pthread_wqthread () Does anyone have an idea where I could start debugging this, without being able to consistently reproduce it?

On macOS, system symbols displays in a SKTexture as expected, with the correct color and aspect ratio. But on iOS they are always displayed in black, and sometimes with slightly wrong aspect ratio. Is there a solution to this problem? import SpriteKit #if os(macOS) import AppKit #else import UIKit #endif class GameScene: SKScene { override func didMove(to view: SKView) { let systemImage = "square.and.arrow.up" let width = 400.0 #if os(macOS) let image = NSImage(systemSymbolName: systemImage, accessibilityDescription: nil)!.withSymbolConfiguration(.init(hierarchicalColor: .white))! let scale = NSScreen.main!.backingScaleFactor image.size = CGSize(width: width * scale, height: width / image.size.width * image.size.height * scale) #else let image = UIImage(systemName: systemImage)!.applyingSymbolConfiguration(.init(pointSize: width))!.applyingSymbolConfiguration(.init(hierarchicalColor: .white))! #endif let texture = SKTexture(image: image) print(image.size, texture.size(), image.size.width / image.size.height) let size = CGSize(width: width, height: width / image.size.width * image.size.height) addChild(SKSpriteNode(texture: texture, size: size)) } }

The following code crashes on macOS 15 Sequoia: import Foundation let key = NSAttributedString.Key("org.example.key") let value = Value() let string = NSMutableAttributedString() string.append(NSAttributedString(string: "a", attributes: [:])) string.append(NSAttributedString(string: "b", attributes: [key: value])) string.append(NSAttributedString(string: "c", attributes: [:])) string.enumerateAttribute(key, in: NSRange(location: 0, length: string.length)) { value, range, stop in print(range) } class Value: Equatable, Hashable { static func == (lhs: Value, rhs: Value) -> Bool { return lhs === rhs } func hash(into hasher: inout Hasher) { hasher.combine(ObjectIdentifier(self)) } } The error is EXC_BAD_ACCESS (code=1, address=0x0) I wanted to run it on my external macOS 14 partition to confirm that it didn't crash before updating to macOS 15, but for some reason macOS will just restart and boot again into macOS 15. So I tried with macOS 13, which I was allowed to start for some reason, and I was able to confirm that the code doesn't crash. Is this a known issue, and is there a workaround? Removing the two lines that add the letters a and c, or just declaring class Value without conformance to Equatable, Hashable, interestingly, solves the issue.