如何处理Flatter中的PlatformException和FirebaseAuthException

我正在尝试验证Flitter中登录屏幕中的密码，以便在用户输入错误密码时显示错误。但它不起作用。当用户输入错误密码时，将返回PlatformException或FirebaseAuthException。我尝试了很多方法来尝试try-catch方法或catchError方法。这是我的auth.dart文件

import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/services.dart';

final FirebaseAuth _auth = FirebaseAuth.instance;

Stream<User> get authStateChange => _auth.authStateChanges();

Future signIn(String email, String password) async {
  UserCredential credential;                                   /*                        */ 
  try {                                                        /*                        */
    credential = await _auth.signInWithEmailAndPassword(       /*                        */
      email: email, password: password                         /*                        */
    );                                                         /*                        */
  } on PlatformException catch(e) {                            /* <= This Is Not Working */
    if (e.code == 'user-not-found') {                          /*                        */
      print('No user found for that email.');                  /*                        */
    } else if (e.code == 'wrong-password') {                   /*                        */
      print('Wrong password provided for that user.');         /*                        */
    }
  }
  User user = credential.user;
  return user;
}

Future createAccount(String email, String password) async {
  try {
    UserCredential credential = await _auth.createUserWithEmailAndPassword(
      email: email, password: password
    );
    User user = credential.user;
    return user;
  } catch(e) {
    print(e.toString());
  }
}

Future resetPassword(String email) async {
  try {
    return await _auth.sendPasswordResetEmail(email: email);
  } catch(e) {
    print(e.toString());
  }
}

Future signOut() async {
  try {
    return await _auth.signOut();
  } catch(e) {
    print(e.toString());
  }
}

import'package:firebase_auth/firebase_auth.dart'；
进口“包装：颤振/cupertino.dart”；
导入“包：flifter/services.dart”；
final FirebaseAuth _auth=FirebaseAuth.instance；
Stream get-authStateChange=>\u auth.authStateChanges（）；
未来登录（字符串电子邮件、字符串密码）异步{
用户凭证凭证；/**/
试试{/**/
credential=wait_auth.sign with Email and Password（/**/
电子邮件：电子邮件，密码：password/**/
);                                                         /*                        */
}在平台上异常捕获（e）{/*我解决了问题。谢谢。
如果你解决了问题，你应该告诉我们解决方案，而不仅仅是问题
Form( 
  key: formKey,
  child: Column(
    children: <Widget>[
      TextFormField(
        validator: (input) {
          return RegExp(
            r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+"
          ).hasMatch(input) ? null : 'Please Enter a Valid Email!';
        },
        controller: emailController,
        decoration: InputDecoration(
          suffixIcon: Icon(Icons.mail, size: 30,),
          labelText: 'Email',
        ),
        style: TextStyle(
          fontSize: fieldFontSize
        ),
      ),
      TextFormField(
        controller: passwordController,
        validator: (input) {
          return input.length < 6 ? 'Your Password Can\'t Be Less Than 6 Characters.' : null;
        },
        decoration: InputDecoration(
          suffixIcon: Icon(Icons.lock, size: 30,),
          labelText: 'Password',
        ),
        style: TextStyle(
          fontSize: fieldFontSize
        ),
        obscureText: true,
      ),
    ],
  ),
),
child: ElevatedButton(
  onPressed: () {
    if(formKey.currentState.validate()) {
      setState(() {
        isLoading = true;
      });
      signIn(emailController.text.trim(), passwordController.text).then((value) => {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('Signed In Succesfully With ${emailController.text}!'),
            ),
          ),
        Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) => HomePage()))
      }).catchError((e) {
        String error = e.toString();
        showDialog(context: context, builder: (context) => SimpleDialog(
          title: Text(error),
        ));
      });
    }
  },
  child: Text('Sign In', style: TextStyle(fontSize: 28),),
  ),
),