With iOS 15 there are changes to keyboard handling. Besides usual overriding of keyCommands a programmer has to assign own commands higher priority than system commands. So, the following code works for me: final class MyViewController: UIViewController { override var keyCommands: [UIKeyCommand]? { let action = UIKeyCommand(input: UIKeyCommand.inputUpArrow, modifierFlags: [], action: #selector(myAction)) if #available(iOS 15, *) { action.wantsPriorityOverSystemBehavior = true } return [action] } // rest of the code } On the other hand, almost the same code but with inheriting from QLPreviewController doesn't work: final class PreviewViewController: QLPreviewController { // same internals as above } In view hierarchy I spotted that there is actually some kind of extra navigation, maybe that is stealing my keyboard presses, maybe that's why above code isn't working. Does anyone have an idea how to fix or workaround this issue? Obviously, the extra navigation is from Apple and I don't have access to these extra presented controllers. I was trying to print the following details, but neither helps: print(presentedViewController ?? "none") // output: none print(topMostViewController) // output: <MyApp.PreviewViewController: 0x7fbe44156203> print(inputViewController ?? "none") // output: none It's worth to add I've also tried to add method override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) { print("test?") super.pressesBegan(presses, with: event) } And test never appears in the console, whatever button I press. So clearly something else steals the key presses. This did not happen before iOS 15. I conclude it, thinking it may be a bug in the API. Probably just no one thought of this scenario when adding the new keys..?

Hi together, I am developing a document viewer for a specific API. I download the relevant files to a custom directory and open them using a QLPreviewController in SwiftUI. I built this with a UIViewControllerRepresentable. Everything is working fine except the saving of modified files using the pencil markup in the preview. Here is the error: https://pastebin.com/TRnfduE5 This is how my controller looks like: struct PreviewController: UIViewControllerRepresentable {     let url: URL     @Binding var isPresented: Bool          func makeUIViewController(context: Context) -> UINavigationController {         let controller = QLPreviewController()         controller.dataSource = context.coordinator         controller.navigationItem.leftBarButtonItem = UIBarButtonItem(                     barButtonSystemItem: .done, target: context.coordinator,                     action: #selector(context.coordinator.dismiss)                 )                  let navigationController = UINavigationController(rootViewController: controller)         return navigationController     }          func makeCoordinator() -> Coordinator {         return Coordinator(parent: self)     }          func updateUIViewController(_ uiViewController: UINavigationController, context: Context) {             let controller = QLPreviewController()             controller.dataSource = context.coordinator         }          class Coordinator: QLPreviewControllerDataSource {                  let parent: PreviewController                  init(parent: PreviewController) {             self.parent = parent         }                  @objc func dismiss() {             parent.isPresented = false         }                  func numberOfPreviewItems(             in controller: QLPreviewController         ) -> Int {             return 1         }                  func previewController(             _ controller: QLPreviewController, previewItemAt index: Int         ) -> QLPreviewItem {             return parent.url as QLPreviewItem         }                  func previewController(_ controller: QLPreviewController, editingModeFor previewItem: QLPreviewItem         ) -> QLPreviewItemEditingMode {             .createCopy         }                  func previewController(_: QLPreviewController, didUpdateContentsOf: QLPreviewItem){             print("Updated.")         }                  func previewController(_: QLPreviewController, didSaveEditedCopyOf: QLPreviewItem, at: URL) {             print("Saved: " + at.path)         }              } } Does anyone know, what the problem is here? And I made another experience: as you see there, I'm currently only logging the output / actions - and there isn't anything being logged, if I made just one edit. It only throws the error above after the 1st edit - so if I edit sth again and tap done or the pencil icon again... Is this ok so? Thanks for any help or advise!

I want to debug my QuickLook extension for macOS. I read somewhere online that when running it in Xcode, I have to select Quick Look Simulator, but I have no idea what to do after that, and I couldn't find any official documentation.

Hello, I am trying to use app groups to share preferences between an app and its QuickLook extension (both sandboxed), but I can't understand why it's not working. For testing, I created an empty macOS app project and added a QuickLook Extension, then on both the targets' entitlement files I added the app group domain in the form "teamid.test". Last but not least, in the Info.plist file of the QL extension i added some UTIs to have the QL extension called when previewing. In the QL extension's PreviewViewController.swift file I try to save a value like this: func preparePreviewOfFile(at url: URL, completionHandler handler: @escaping (Error?) -> Void) { let defaults=UserDefaults(suiteName: "teamid.***") defaults?.set(1, forKey: "test") handler(nil) } If I try to run the app and preview a file though, I get this message in the Console: Couldn't write values for keys ( test ) in CFPrefsPlistSource<0x7fb63681cce0> (Domain: teamid.***, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null), Contents Need Refresh: Yes): setting preferences outside an application's container requires user-preference-write or file-write-data sandbox access And the value is not saved. The only way to make this work is to add a temporary exception in the extension target, like this: <array> <string>/Library/Group Containers/teamid.***/</string> </array> </plist> What bugs me is that if I try to save a value from the app instead, it works. Are app groups not supported for QuickLook extensions? Thank you, Michele

Is it possible to write to an App Group's Container folder or UserDefaults from an iOS Thumbnail Extension or QuickLook Extension? It doesn't work. It does work for a Widget extension. I've added the App Group to the Entitlements of each extension. For writing a file to App Group Container I get Error Domain=NSCocoaErrorDomain Code=513 "Du hast nicht die Zugriffsrechte, um die Datei „quicklook 01 current.log“ im Ordner „DocumentInvestigation“ zu sichern." UserInfo={NSFilePath=/private/var/mobile/Containers/Shared/AppGroup/<redacted: the container UUID>/DocumentInvestigation/quicklook 01 current.log, NSUnderlyingError=0x28090bb10 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}} For setting App Group UserDefaults [User Defaults] Couldn't write values for keys ( &#9;&#9;example ) in CFPrefsPlistSource<0x2839cc700> (Domain: <redacted: the-group-identifier>, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null), Contents Need Refresh: No): setting preferences outside an application's container requires user-preference-write or file-write-data sandbox access The use case is, that we are investigating an issue and would like to log to a file which we then can have customers send us.

Hi, I'm trying to write a Quick Look extension for my iOS app. However, I'm having issues initializing AVAudioEngine in my QLPreviewingController subclass from preparePreviewOfFile. The following error messages are printed to the console after attempting to initialize AVAudioEngine, and the Quick Look Extension crashes with EXC_BAD_ACCESS. The same code works fine within the main iOS app. It also works on macOS inside a Catalyst app on the macOS Monterey RC when previewing a file in the Finder. I've also filed feedback with feedback number FB9713048. Thanks for taking a look at this. Console output: [audiocomp] AudioComponentPluginMgr.mm:545 reg server remote proxy error Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.audio.AudioComponentRegistrar was invalidated: failed at lookup with error 159 - Sandbox restriction." UserInfo={NSDebugDescription=The connection to service named com.apple.audio.AudioComponentRegistrar was invalidated: failed at lookup with error 159 - Sandbox restriction.} [as] AudioSessionClientManager.cpp:475 Couldn't connect to com.apple.audio.AudioSession Error: 1100; AudioSession will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] AURemoteIO is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: AURemoteIO returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] AURemoteIO is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: AURemoteIO returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] AURemoteIO is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: AURemoteIO returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] GetProperty is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: GetProperty returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] SetProperty is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: SetProperty returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] Initialize is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: Initialize returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:1123 failed: 268435459 (enable 2, outf< 2 ch, 0 Hz, Float32, deinterleaved> inf< 2 ch, 0 Hz, Float32, deinterleaved>) throwing -10878 throwing -10878 throwing -10878 throwing -10878 throwing -10878 throwing -10878 throwing -10878 throwing -10878 throwing -10878 [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] SetProperty is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: SetProperty returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] Initialize is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: Initialize returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:1123 failed: 268435459 (enable 2, outf< 2 ch, 44100 Hz, Float32, deinterleaved> inf< 2 ch, 0 Hz, Float32, deinterleaved>) [avae] AVAEInternal.h:109 [AVAudioEngineGraph.mm:1344:Initialize: (err = PerformCommand(*outputNode, kAUInitialize, NULL, 0)): error 268435459 [avae] AVAudioEngine.mm:167 Engine@0x2830594d0: could not initialize, error = 268435459 [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] SetProperty is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: SetProperty returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] Initialize is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: Initialize returned server mach error 0x10000003! [aurioc] AURemoteIO.cpp:1123 failed: 268435459 (enable 2, outf< 2 ch, 44100 Hz, Float32, deinterleaved> inf< 2 ch, 0 Hz, Float32, deinterleaved>) [avae] AVAEInternal.h:109 [AVAudioEngineGraph.mm:1344:Initialize: (err = PerformCommand(*outputNode, kAUInitialize, NULL, 0)): error 268435459 [avae] AVAudioEngineGraph.mm:4631 Can't retrieve source node to play sequence because there is no output node! [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [aurioc] AURemoteIO.cpp:148 Couldn't connect to com.apple.audio.AURemoteIOServer; AURemoteIO will not be usable [default] GetProperty is passing a serverPID of 0 to CheckRPCError! [default] CheckRPCError: GetProperty returned server mach error 0x10000003! (lldb)

Hi I am trying to display a USDZ model in my app using code similar to that described here: https://developer.apple.com/documentation/arkit/previewing_a_model_with_ar_quick_look however, after updating to iOS 15 and Xcode 13 the option to toggle between the base model view and the AR view is no longer there, the share button is also missing. I am using view inside a navigation view in SwiftUI with code as follows. import SwiftUI struct ModelView: View {   var body: some View {     ARQuickLookView()   } } struct ModelView_Previews: PreviewProvider {   static var previews: some View {     ModelView()   } } import SwiftUI import QuickLook import ARKit struct ARQuickLookView: UIViewControllerRepresentable {   var allowScaling: Bool = true       func makeCoordinator() -> ARQuickLookView.Coordinator {     Coordinator(self)   }       func makeUIViewController(context: Context) -> QLPreviewController {     let controller = QLPreviewController()     controller.dataSource = context.coordinator     return controller   }       func updateUIViewController(_ controller: QLPreviewController,                 context: Context) {     // nothing to do here   }       class Coordinator: NSObject, QLPreviewControllerDataSource {     let parent: ARQuickLookView           init(_ parent: ARQuickLookView) {       self.parent = parent       super.init()     }           func numberOfPreviewItems(in controller: QLPreviewController) -> Int {       return 1     }           func previewController(      _ controller: QLPreviewController,      previewItemAt index: Int) -> QLPreviewItem {       let url = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("model.usdz")       return url as QLPreviewItem     }         } } struct ARQuickLookView_Previews: PreviewProvider {   static var previews: some View {     ARQuickLookView()   } } Any info on why I don't have these options and how I could get them back would be appreciated. Thanks Louis