I am facing an issue in iOS 18 that works fine in iOS 17 and earlier.
This happens when you set the project to use Swift 6, if you set swift 5 this will work ok.
The app has the Privacy - Camera Usage Description key in the Info.plist.
It is a wrapper that implements UIViewControllerRepresentable to create the UIViewController. This wrapper is within a view that gets pushed when the user presses a button (see snippet code below).
Sometimes, I get a popup asking for permission to access the camera, and the app crashes immediately. Other times, I don’t see the popup, and the app crashes right away.
I tried adding Task { @MainActor } within the requestAccess closure, but it did not resolve the issue. It does not matter the code within the closure; it crashes even if the closure is empty.
The crash trace shows _dispatch_assert_queue_fail (see the attached image).
Has anyone else experienced this issue? Any insights would be greatly appreciated.
The following code will crash if run as is.
***** Please add the Privacy - Camera Usage Description key in the Info.plist to prevent this issue.
import SwiftUI
import AVFoundation
struct ContentView: View {
var body: some View {
VStack {
Text("Hello, world!")
ViewControllerWrapper()
}
}
}
struct ViewControllerWrapper: UIViewControllerRepresentable {
func makeUIViewController(context: Context) -> ViewController {
ViewController()
}
func updateUIViewController(_ viewController: ViewController, context: Context) {}
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
AVCaptureDevice.requestAccess(for: .video) { _ in
}
}
}