在 flutter 中的 Firestore 响应后自动关闭对话框

Question

I have created a dialog box in which I'm animating a CircularProgressIndicator, it loads when firebase authentication is being carried out. It all goes fine unless login fails for some reason like (no internet, wrong email/password), app show error dialog then this dialog box keeps displaying unless I tap outside the box. I want this to automatically close if another dialog box or error box appears.

Future signIn()async{

try {
    showDialog(context: context, builder: (context) =>
        AlertDialog(
          title: Center(
            child: CircularProgressIndicator(
              color: Colors.deepOrange,
            ),
          ),
        )
    );

  await FirebaseAuth.instance.signInWithEmailAndPassword(
    email: emailController.text,
    password: passwordController.text,
  );

  fetchData();
  // print(role_firestore);
  if ( role_firestore == 'Admin'){

    return Navigator.push(
        context,
        MaterialPageRoute(builder: (context) => AdminHomePage()));
  }else if (role_firestore == 'User'){
    return Navigator.push(
      context,
      MaterialPageRoute(builder: (context) =>  MainPage()));
  }else if (role_firestore == 'Restaurant'){
    return Navigator.push(context, MaterialPageRoute(builder: (context) => 
   Restaurants()));
  }else {
    Navigator.pop(context);
  }
} on FirebaseAuthException catch (e) {
  final result = await Connectivity().checkConnectivity();
  showConnectivitySnackBar(result);
  handleLoginError (e);

}

}

and this is the dialog box which shows firestore errors

showDialog(context: context, builder: (context)=> AlertDialog(
  title: const Text("Log In Failed",style: TextStyle(color: Colors.deepOrange)),
  content: Text(messageToDisplay,style: TextStyle(color: Colors.deepOrange)),
  actions: [TextButton( onPressed: () {Navigator.of(context, rootNavigator: 
  true).pop();},
    child: const Text("Ok",style: TextStyle(color: Colors.deepOrange)),)],
));

Answer 1

you can close/pop your dialog by calling:

Navigator.of(context).pop();

just put it at the end of the method where the data is loaded when the try succeed and in the start of the catch if an error got caught