如何处理 Flutter 上的 Firebase 身份验证异常 [英] How to Handle Firebase Auth exceptions on flutter

问题描述

请问有谁知道如何在 flutter 上捕获 firebase Auth 异常并显示它们?

Please does anyone know how to catch firebase Auth exceptions on flutter and display them?

注意:我对控制台不感兴趣 (catcherror((e) print(e))

Note: I am not interested in the console (catcherror((e) print(e))

我需要一些更有效的东西，例如用户不存在"这样我就可以将它传递给一个字符串并显示它.

I need something that is more effective, e.g " user doesn't exist" So that I can then pass it to a string and display it.

几个月来一直在处理这个问题.

Been dealing with this for months.

提前致谢.

我尝试用//errorMessage=e.toString(); 替换 print(e);然后传递给一个函数，所有的努力都是徒劳的.

I have tried replacing print(e) with // errorMessage=e.toString(); and then passing it to a function, all efforts have been futile.

    FirebaseAuth.instance
              .signInWithEmailAndPassword(email: emailController.text, password: passwordController.text)
              .then((FirebaseUser user) {
                _isInAsyncCall=false;
            Navigator.of(context).pushReplacementNamed("/TheNextPage");

          }).catchError((e) {
           // errorMessage=e.toString();
            print(e);
            _showDialog(errorMessage);

            //exceptionNotice();
            //print(e);

我希望能够提取异常消息并将异常消息传递给一个对话框，然后我可以向用户显示该对话框.

I want to be able to extract the exception message and pass the exception message to a dialog that I can then display to the user.

推荐答案

(21/02/20) 这个答案很旧，其他答案包含跨平台解决方案，所以你应该先看看他们的这是一种后备解决方案.

firebase auth 插件还没有真正的跨平台错误代码系统，所以你必须独立处理 android 和 ios 的错误.

The firebase auth plugin doesn't really have a proper cross-platform error code system yet so you have to handle errors for android and ios independently.

我目前正在使用这个 github 问题的临时修复:#20223

I'm currently using the temporary fix from this github issue: #20223

请注意，因为它是一个临时修复程序，所以不要指望它作为永久解决方案是完全可靠的.

Do note since its a temp fix, don't expect it to be fully reliable as a permanent solution.

enum authProblems { UserNotFound, PasswordNotValid, NetworkError }

try {
  FirebaseUser user = await FirebaseAuth.instance.signInWithEmailAndPassword(
      email: email,
      password: password,
  );
} catch (e) {
  authProblems errorType;
  if (Platform.isAndroid) {
    switch (e.message) {
      case 'There is no user record corresponding to this identifier. The user may have been deleted.':
        errorType = authProblems.UserNotFound;
        break;
      case 'The password is invalid or the user does not have a password.':
        errorType = authProblems.PasswordNotValid;
        break;
      case 'A network error (such as timeout, interrupted connection or unreachable host) has occurred.':
        errorType = authProblems.NetworkError;
        break;
      // ...
      default:
        print('Case ${e.message} is not yet implemented');
    }
  } else if (Platform.isIOS) {
    switch (e.code) {
      case 'Error 17011':
        errorType = authProblems.UserNotFound;
        break;
      case 'Error 17009':
        errorType = authProblems.PasswordNotValid;
        break;
      case 'Error 17020':
        errorType = authProblems.NetworkError;
        break;
      // ...
      default:
        print('Case ${e.message} is not yet implemented');
    }
  }
  print('The error is $errorType');
}

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