Flutter + Firebase:如何发送电子邮件验证

import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_auth/firebase_auth.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Firebase Email Verification',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: EmailVerificationPage(),
    );
  }
}

class EmailVerificationPage extends StatefulWidget {
  @override
  _EmailVerificationPageState createState() => _EmailVerificationPageState();
}

class _EmailVerificationPageState extends State<EmailVerificationPage> {
  final FirebaseAuth _auth = FirebaseAuth.instance;

  @override
  void initState() {
    super.initState();
    _sendEmailVerification();
  }

  Future<void> _sendEmailVerification() async {
    User? user = _auth.currentUser;
    if (user != null && !user.emailVerified) {
      await user.sendEmailVerification();
      print('Verification email sent');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Email Verification'),
      ),
      body: Center(
        child: Text('Verification email sent'),
      ),
    );
  }
}