将登录用户存储到flutter中的云Firestore

dependencies:
  flutter:
    sdk: flutter
  cloud_firestore: ^2.5.4
  firebase_core: ^1.10.0

import 'package:firebase_core/firebase_core.dart';

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

import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

class LoginForm extends StatefulWidget {
  @override
  _LoginFormState createState() => _LoginFormState();
}

class _LoginFormState extends State<LoginForm> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

  void _submitForm() {
    if (_formKey.currentState!.validate()) {
      String email = _emailController.text;
      String password = _passwordController.text;

      // 存储用户数据到Firestore
      FirebaseFirestore.instance.collection('users').add({
        'email': email,
        'password': password,
      });

      // 清空表单字段
      _emailController.clear();
      _passwordController.clear();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Form(
      key: _formKey,
      child: Column(
        children: [
          TextFormField(
            controller: _emailController,
            decoration: InputDecoration(labelText: 'Email'),
            validator: (value) {
              if (value!.isEmpty) {
                return 'Please enter an email';
              }
              return null;
            },
          ),
          TextFormField(
            controller: _passwordController,
            decoration: InputDecoration(labelText: 'Password'),
            obscureText: true,
            validator: (value) {
              if (value!.isEmpty) {
                return 'Please enter a password';
              }
              return null;
            },
          ),
          ElevatedButton(
            onPressed: _submitForm,
            child: Text('Submit'),
          ),
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';

class LoginPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Login Page'),
      ),
      body: Center(
        child: Padding(
          padding: EdgeInsets.all(16.0),
          child: LoginForm(),
        ),
      ),
    );
  }
}