How to push a new root view using SwiftUI without NavigationLink?

Question

I have a login screen. After user fill up credential, I want to verify it then start a new root view so user won\'t be able to navigate back to the login view. I currently

Answer 1

Another approach with Notifications is to place the observer inside your RootView and check for changes in a variable to decide which View should be presented, here is a very simplified example:

struct RootView: View {

    @State var isLoggedIn: Bool = false

    var body: some View {
        Group {
            VStack{
                if isLoggedIn {
                    Text("View B")
                    Button(action: {
                        NotificationCenter.default.post(name: NSNotification.Name("changeLogin"), object: nil)
                    }) {
                        Text("Logout")
                    }
                } else {
                    Text("View A")
                    Button(action: {
                        NotificationCenter.default.post(name: NSNotification.Name("changeLogin"), object: nil)
                    }) {
                        Text("Login")
                    }
                }
            }
        }.onAppear {
            NotificationCenter.default.addObserver(forName: NSNotification.Name("changeLogin"), object: nil, queue: .main) { (_) in
                self.isLoggedIn.toggle()
            }
        }
    }

And load RootView in your rootViewController as usual.

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    let contentView = RootView()
    if let windowScene = scene as? UIWindowScene {
        let window = UIWindow(windowScene: windowScene)
        window.rootViewController = UIHostingController(rootView: contentView)
        self.window = window
        window.makeKeyAndVisible()
    }
}