I'm trying to sign in with Gmail on my swift UI MacOS app. I have the state object here

    @State var sharedUser = User.shared
    var body: some Scene {
        WindowGroup {
            ContentView()
                .onOpenURL { url in
                  GIDSignIn.sharedInstance.handle(url)
                }
                .onAppear {
                          GIDSignIn.sharedInstance.restorePreviousSignIn { user, error in
                              if error != nil { return }
                              
                              sharedUser.signIn(user: user)
                           }
                }
        }
    }

I see that it restores the previous sign in and I make the shared User the user it returns

Over here in the content view I have a check to see if the user is logged in

    @State var user = User.shared
    var body: some View {
        VStack {
            if user.user != nil {
                Button(action: {
                    logout()
                }) {
                    Text("Sign Out")
                }
            } else {
                GoogleSignInButton(action: handleSignInButton)
            }

However user always returns nil, and I'm wondering how I can share the object value from the App Struct to the View

CodePudding user response：

1. Make your User type conform to ObservableObject (which means it has to be class).
2. Add @Published in front of all the properties (in User) that you want SwiftUI to detect changes.
3. Instead of @State, use @ObservedObject.