如何在 flutter 中使用枚举？

Question

I am making a Flutter app in which you can sign in with a Google Account. I would like to add this enum to the program:

enum AuthStatus {
  NOT_DETERMINED,
  NOT_LOGGED_IN,
  LOGGED_IN,
}
 if (user != null) {
          _userId = user?.uid;
        }
        authStatus =
            user?.uid == null ? AuthStatus.NOT_LOGGED_IN : AuthStatus.LOGGED_IN;

This way I could make a proper loading screen. My question is where should I put this code and how?

Answer 1

Treat them as values, for example

AuthStatus _authStatus = NOT_DETERMINED;

if(_authStatus == NOT_DETERMINED){
 tryLogin();
}

tryLogin(){
 //login
 _authStatus = LOGGED_IN;
}

just declare them outside any class on global level