Flutter 错误 Firebase 用户 ReauthenticateWithCredential

Question

我正在 flutter 中开发一个应用程序，我需要重新验证用户，但出现以下错误

I/flutter (14968): Error: NoSuchMethodError: The method '[]' was called on null
I/flutter (14968): Receiver: null
I/flutter (14968): Tried calling: []("user")    

下面是我用来重新验证用户身份的代码

FirebaseUser user = await FirebaseAuth.instance.currentUser();
  print("User Email: ${user.email}");
  AuthCredential authCredential = EmailAuthProvider.getCredential(
    email: user.email,
    password: _oldPassController.text,
  );
  print("Auth Credential: ${authCredential.toString()}");
  user.reauthenticateWithCredential(authCredential).then((result) {
    print("Success: $result");
  }).catchError((error) {
    print("Error: $error");
    setState(() {
      _isLoading = false;
    });
    if (error is PlatformException) {
      PlatformException exception = error;
      showAlertDialog(context, exception.message);
    } else {
      showAlertDialog(context, error.toString());
    }
  });

Answer 1

我没有解决实际问题的方法（我认为这实际上是 Firebase 到 Flutter 项目的连接问题），但我有一个适合我的解决方法。我只是使用signInWithEmailAndPassword() 代替reauthenticateWithCredential()，它似乎工作正常。就像这样：

    AuthResult authResult = await FirebaseAuth.instance
          .signInWithEmailAndPassword(email: email, password: password);
    FirebaseUser firebaseUser = authResult.user;

调用signInWithEmailAndPassword()后，用户将被重新验证，因为他们最近刚刚登录过。希望它有用。