Flutter - 如何在異步 function 完成后觸發 function

Question

您好，我希望 addUserToFirestore() function 在上面的代碼執行完畢后觸發

Future<void> registerAccount(
      String email,
      String displayName,
      String password,
      void Function(FirebaseAuthException e) errorCallback) async {
    try {
      var credential = await FirebaseAuth.instance
          .createUserWithEmailAndPassword(email: email, password: password);
      await credential.user!.updateDisplayName(displayName);

      addUserToFirestore();
    } on FirebaseAuthException catch (e) {
      errorCallback(e);
    }
  }

Answer 1

嘗試將您的代碼更改為：

 await credential.user!.updateDisplayName(displayName)
   .then((_) => addUserToFirestore());

這樣addUserToFirestore()只會在updateDisplayName()完成后觸發