Change the root view of UIHostingController in SwiftUI

Question

For a new SwiftUI iOS app, I do the following in the SceneDelegate

if let windowScene = scene as? UIWindowScene {
    let window =          


        

Answer 1

Very good answer LuLugaga, updated if you don't want to use @Observablebject so will not keep updating all the time, you can use Subject, as soon as you update token String, RootView will update.

struct RootView: View {

    var loginViewModel: LoginViewModel = LoginViewModel()

    @State var tokenString = ""

    var body: some View {
        Group {
            tokenString.count > 0 ? AnyView(ContentView(model: playerViewModel)) :  AnyView(LoginView(loginViewModel: loginViewModel))
        }.onReceive(loginViewModel.tokenString) {
            self.tokenString = $0
        }
    }
}


class LoginViewModel {

    let tokenString = PassthroughSubject()

    var token: String {
        get { return "" }
    set {
        self.tokenString.send(newValue)
    }
}