😋 初始化仓库
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252
lib/screens/login_screen.dart
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252
lib/screens/login_screen.dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../providers/auth_provider.dart';
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import 'home_screen.dart';
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/// Login screen for user authentication
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///
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/// Provides input fields for student ID, EC password, and UAAP password
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/// Integrates with AuthProvider for authentication
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class LoginScreen extends StatefulWidget {
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const LoginScreen({super.key});
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@override
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State<LoginScreen> createState() => _LoginScreenState();
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}
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class _LoginScreenState extends State<LoginScreen> {
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final _formKey = GlobalKey<FormState>();
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final _userIdController = TextEditingController();
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final _ecPasswordController = TextEditingController();
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final _passwordController = TextEditingController();
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bool _obscureEcPassword = true;
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bool _obscurePassword = true;
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@override
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void dispose() {
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_userIdController.dispose();
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_ecPasswordController.dispose();
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_passwordController.dispose();
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super.dispose();
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}
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Future<void> _handleLogin() async {
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if (!_formKey.currentState!.validate()) {
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return;
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}
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final authProvider = Provider.of<AuthProvider>(context, listen: false);
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final success = await authProvider.login(
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userId: _userIdController.text.trim(),
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ecPassword: _ecPasswordController.text,
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password: _passwordController.text,
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);
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if (!mounted) return;
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if (success) {
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// Navigate to home screen
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Navigator.of(context).pushReplacement(
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MaterialPageRoute(builder: (context) => const HomeScreen()),
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);
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} else {
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// Show error message
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(authProvider.errorMessage ?? '登录失败'),
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backgroundColor: Theme.of(context).colorScheme.error,
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),
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);
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: SafeArea(
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child: Center(
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child: SingleChildScrollView(
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padding: const EdgeInsets.all(24.0),
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child: Form(
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key: _formKey,
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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// App logo/title
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Icon(
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Icons.school,
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size: 80,
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color: Theme.of(context).colorScheme.primary,
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),
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const SizedBox(height: 16),
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Text(
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'自动评教系统',
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style: Theme.of(context).textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.bold,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 8),
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Text(
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'安徽财经大学',
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style: Theme.of(context).textTheme.bodyLarge?.copyWith(
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color: Theme.of(context).colorScheme.onSurfaceVariant,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 48),
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// Student ID field
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TextFormField(
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controller: _userIdController,
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decoration: const InputDecoration(
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labelText: '学号',
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hintText: '请输入学号',
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prefixIcon: Icon(Icons.person),
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),
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keyboardType: TextInputType.number,
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validator: (value) {
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if (value == null || value.trim().isEmpty) {
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return '请输入学号';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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// EC password field
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TextFormField(
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controller: _ecPasswordController,
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decoration: InputDecoration(
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labelText: 'EC密码',
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hintText: '请输入EC系统密码',
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prefixIcon: const Icon(Icons.lock),
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suffixIcon: IconButton(
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icon: Icon(
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_obscureEcPassword
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? Icons.visibility_off
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: Icons.visibility,
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),
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onPressed: () {
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setState(() {
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_obscureEcPassword = !_obscureEcPassword;
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});
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},
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),
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),
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obscureText: _obscureEcPassword,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return '请输入EC密码';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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// UAAP password field
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TextFormField(
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controller: _passwordController,
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decoration: InputDecoration(
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labelText: 'UAAP密码',
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hintText: '请输入UAAP系统密码',
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prefixIcon: const Icon(Icons.vpn_key),
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suffixIcon: IconButton(
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icon: Icon(
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_obscurePassword
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? Icons.visibility_off
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: Icons.visibility,
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),
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onPressed: () {
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setState(() {
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_obscurePassword = !_obscurePassword;
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});
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},
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),
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),
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obscureText: _obscurePassword,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return '请输入UAAP密码';
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}
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return null;
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},
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),
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const SizedBox(height: 32),
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// Login button
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Consumer<AuthProvider>(
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builder: (context, authProvider, child) {
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final isLoading = authProvider.state == AuthState.loading;
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return ElevatedButton(
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onPressed: isLoading ? null : _handleLogin,
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style: ElevatedButton.styleFrom(
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padding: const EdgeInsets.symmetric(vertical: 16),
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backgroundColor: Theme.of(
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context,
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).colorScheme.primary,
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foregroundColor: Theme.of(
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context,
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).colorScheme.onPrimary,
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),
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child: isLoading
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? const SizedBox(
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height: 20,
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width: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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),
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)
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: const Text('登录', style: TextStyle(fontSize: 16)),
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);
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},
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),
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const SizedBox(height: 16),
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// Help text
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Text(
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'首次登录需要输入EC和UAAP系统密码\n登录信息将被安全加密存储',
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style: Theme.of(context).textTheme.bodySmall?.copyWith(
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color: Theme.of(context).colorScheme.onSurfaceVariant,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 32),
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// Signature
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Column(
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children: [
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Text(
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'❤ Created By LoveACE Team',
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style: Theme.of(context).textTheme.bodySmall?.copyWith(
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color: Theme.of(
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context,
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).colorScheme.onSurfaceVariant.withOpacity(0.6),
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 4),
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Text(
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'🌧 Powered By Sibuxiangx & Flutter',
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style: Theme.of(context).textTheme.bodySmall?.copyWith(
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color: Theme.of(
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context,
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).colorScheme.onSurfaceVariant.withOpacity(0.6),
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),
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textAlign: TextAlign.center,
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),
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],
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),
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],
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),
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),
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),
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),
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),
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);
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}
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}
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