Same here. Filed as FB8915855.

Still running into this today. It looks like this is fixed as of iOS 11.3, so to support older versions, I have this method in my UIPresentationController subclass: internal func animateDimmingViewDisappearing() {     guard let dimmingView = dimmingView,         let transitionCoordinator = presentedViewController             .transitionCoordinator         else { return }     // Despite this API being available earlier, iOS 11.3 is the first OS     // that doesn’t just animate this instantly.     if #available(iOS 11.3, *) {         transitionCoordinator.animateAlongsideTransition(             in: dimmingView.superview,             animation: { _ in dimmingView.alpha = 0 },             completion: { _ in dimmingView.removeFromSuperview() }         )     } else {         UIView.beginAnimations("animateDimmingViewDisappearing",                                context: nil)         if transitionCoordinator.transitionDuration > 0 {             UIView.setAnimationDuration(                 transitionCoordinator.transitionDuration             )         }         else {             UIView.setAnimationDuration(1.0 / 3.0)         }         UIView.setAnimationCurve(transitionCoordinator.completionCurve)         dimmingView.alpha = 0         UIView.commitAnimations()     } }

Last reply, because I’m an ***** and didn’t see the exectuableURL property the first time through:let process = Process() process.executableURL = url process.arguments = ["test"] process.launch() process.waitUntilExit()This works fine, and crucially lets me use Process, so I can terminate the running process.

OK, more progress. This works—apparently I just wasn’t letting the task live long enough:let url = URL(fileURLWithPath: "/bin/echo") do { let task = try NSUserUnixTask(url: url) task.standardOutput = FileHandle(forWritingAtPath: "/Users/jeff/Desktop/test") task.execute(withArguments: ["test"]) { error in if let error = error { fatalError(error.localizedDescription) } print("Hello") exit(0) } } catch { fatalError(error.localizedDescription) } dispatchMain()

I’ve also tried using NSUserUnixTask, but this seems to quit immediately:let url = URL(fileURLWithPath: "/bin/echo") do { let task = try NSUserUnixTask(url: url) task.standardOutput = FileHandle(forWritingAtPath: "/Users/jeff/Desktop/test") task.execute(withArguments: ["test"]) { error in if let error = error { fatalError(error.localizedDescription) } print("Hello") } } catch { fatalError(error.localizedDescription) }My print statement never prints, and the file is not written. If I create the file, it does not receive any contents.

Thanks for the reply. You’re right, I’m using xcrun to launch simctl. Here’s a simple example of how I’m trying to launch the process, from a Swift command-line utility. The app sandbox is not in the Signing & Capabilities section of Xcode, and there are no entitlements:import Foundation let process = Process() process.arguments = ["/bin/echo", "Hello, World!"] process.launch() process.waitUntilExit()This generates the above error about reading from that location.

The only way I have found for this so far is to use the focusable() modifier:var body: some View { myView() .focusable() .touchBar() { … } }

I think I figured it out. In the callback for the animation frame, I’m setting an image property to an Image struct with the CGImage I get from ImageIO. As you scroll, if a row comes back into view that had a cached CGImage from this animation block, and the animation has since been stopped, then accessing it crashed. So, setting the image property back to nil when I stop the animation fixed the issue.

Also, if it helps, I’m getting some output in the Xcode console while this happens:0000000A: 0100 4 4 128 00000016: 0101 4 4 128 00000022: 0102 3 6 110 0000002E: 011A 5 8 116 0000003A: 011B 5 8 124 00000046: 0128 3 2 2 00000052: 0131 2 12 132 0000005E: 0132 2 20 144 000000A6: 0100 4 4 256 000000B2: 0101 4 4 256 000000BE: 0102 3 6 266 000000CA: 0103 3 2 6 000000D6: 0106 3 2 6 000000E2: 0115 3 2 3 000000EE: 0201 4 4 272 000000FA: 0202 4 4 3957 0000000A: 0100 4 4 128 00000016: 0101 4 4 128 00000022: 0102 3 6 110 0000002E: 011A 5 8 116 0000003A: 011B 5 8 124 00000046: 0128 3 2 2 00000052: 0131 2 12 132 0000005E: 0132 2 20 144 000000A6: 0100 4 4 256 000000B2: 0101 4 4 256 000000BE: 0102 3 6 266 000000CA: 0103 3 2 6 000000D6: 0106 3 2 6 000000E2: 0115 3 2 3 000000EE: 0201 4 4 272 000000FA: 0202 4 4 3957