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I'm opening multiple scenes in the Mac Catalyst version of my iPad app. The problem is that all of the windows simply show my app name in each window title. This makes it confusing looking at the list of windows in the Window menu. Plus I want to specific information to appear in the window title beside the app name.UIWindowScene has a promising Mac Catalyst-only property named titleBar of type UITitleBar. Sounds promising but it has nothing related to setting any kind of title. Strange.There's nothing I can find in the UIScene or UIWindow classes or anything related to scenes.Is there any way to set a window's title in a Mac Catalyst app?

My own iOS app is using AVFoundation to do barcode scanning. Under Mac Catalyst I'm getting an error. Turns out the Apple provided AVCam demo app has the exact same issue.Both the Swift and Objective-C versions of the AVCam demo app fail but the Objective-C version gives a better error so I'll refer to that in the rest of the question.In the AVCamCameraViewController, the configureSession method fails on the line:AVCaptureDeviceInput* videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error];The error is:Could not create video device input: Error Domain=AVFoundationErrorDomain Code=-11814 "Cannot Record" UserInfo={NSLocalizedDescription=Cannot Record, NSLocalizedRecoverySuggestion=Try recording again.}It turns out that none of the three attempts to call [AVCaptureDevice defaultDeviceWithDeviceType:... are succeeding.This is the same error I get in my own app though I only attempt to call [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; which is also returning nil.Permission was granted for the app to access the camera.There is nothing related to this issue in the release notes for macOS 10.15. I am running the GM version of 10.15 with Xcode 11.1 on a 2018 15" Macbook Pro.How do we successfully get a video capture device under Mac Catalyst?

I know that the `UISceneDelegate scene(_:openURLContexts:)` delegate method is meant as the `UIScene` equivalent of the `UIApplicationDelegate application(_:open:options:)` delegate method. But an app can have multiple active scenes while only one will have this delegate called at a time and it always seems to be the "first" scene.Is there any condition or action that will result in a specific scene (and not just the "first" one) having its `openURLContexts` delegate called or did this turn out to be a flawed design? What am I missing?Let me clarify the situation with an example.You have an app that supports multiple scenes in iPadOS. The user is actively using two side-by-side scenes for your app. There may even be some disconnected scenes in the background. Either way, assume there are multiple scenes.Let's also say that your app can open files of certain types. The user switches from your app to the Files app or just about any app that lets you share a file. In the other app you select a file and choose to open it with your (multi-scene) app.At this point your app is put back in the foreground and the `openURLContexts` delegate is called on just one of the currently active scenes in your app.The same issue arises if your app supports a custom URL scheme and your app is launched (or brought back to the foreground) via its custom URL scheme.So what's the point of this being done on the scene delegate? There are multiple scenes. Only one has this delegate called. Depending on the needs of your app, you probably only want to handle this file in one specific scene but it may not be the scene whose delegate was called. You need to write code to go through the existing scenes and determine which one should actually handle the file, regardless of the scene that was called.Given this, wouldn't it have been better to just call the `UIApplicationDelegate` to handle the open URL request? Or, as stated in my original question in the second paragraph, are there conditions that call the delegate on a specific scene?