SwiftUI broken NavigationPath as of iOS 17. Not fixed as of release of GM 17.0

@realityworks

Sep '23

Can someone escalate this huge issue to Apple SwiftUI devs... not idea how this got out into iOS 17 GM ->

Have raised an issue with Apple via feedback assistant.

Using the new navigationDestination and NavigationPath functions previously on iOS 16 everything has been working fine using a custom back button, which calls path.removeLast().

However, if we try this on iOS 17, the screen being removed flashes white.

You can try this code as an example (NOTE THE WHITE FLASH when calling path.removeLast()):

struct DetailView: View {
    @Binding var path: NavigationPath

    var body: some View {
        ZStack {
            Color.black
            VStack(alignment: .center) {
                Spacer()
                Button(action: {
                    path.removeLast()
                }, label: {
                    Text("BACK")
                })
                Spacer()
            }
        }
    }
}

struct ParentView: View {
    @State var path: NavigationPath = .init()

    var body: some View {
        NavigationStack(path: $path) {
            ZStack {
                Color.red
                VStack(alignment: .center) {
                    Spacer()
                    Button(action: {
                        path.append("TEST")
                    }, label: {
                        Text("FORWARD")
                    })
                    Spacer()
                }
            }
            .navigationDestination(for: String.self) { _ in
                DetailView(path: $path)
            }
        }
    }
}

2