flutter_integrated_whb/lib/main.dart

import 'package:flutter/material.dart';
import 'package:qhd_prevention/pages/home/study/study_detail_page.dart';
import 'package:shared_preferences/shared_preferences.dart';
import './pages/login_page.dart';
import './pages/main_tab.dart';
import 'package:intl/date_symbol_data_local.dart';
import 'http/HttpManager.dart';

// 全局导航键
final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

// 全局消息控制器
class GlobalMessage {
  static void showError(String message) {
    final context = navigatorKey.currentContext;
    if (context != null) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(message),
          backgroundColor: Colors.red,
          duration: const Duration(seconds: 3),
        ),
      );
    }
  }
}

void main() async {
  // 确保Flutter引擎初始化完成
  WidgetsFlutterBinding.ensureInitialized();
  await initializeDateFormatting('zh_CN', null);

  // 获取共享首选项实例
  final prefs = await SharedPreferences.getInstance();

  // 获取登录状态
  final isLoggedIn = prefs.getBool('isLoggedIn') ?? false;

  // 初始化HTTP管理器
  HttpManager.onUnauthorized = () async {
    // 清除登录状态
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool('isLoggedIn', false);
    await prefs.remove('token'); // 如果有token的话

    // 导航到登录页
    navigatorKey.currentState?.pushNamedAndRemoveUntil(
      '/login',
          (route) => false,
    );

    // 等一帧让页面构建完成
    Future.delayed(const Duration(milliseconds: 100), () {
      GlobalMessage.showError('会话已过期，请重新登录');
    });
  };

  runApp(MyApp(isLoggedIn: isLoggedIn));
}

class MyApp extends StatelessWidget {
  final bool isLoggedIn;

  const MyApp({super.key, required this.isLoggedIn});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: '',
      navigatorKey: navigatorKey, // 设置全局导航键
      builder: (context, child) {
        return GestureDetector(
          behavior: HitTestBehavior.translucent, // 让空白区域也能点击
          onTap: () {
            // 收起键盘
            FocusScope.of(context).unfocus();
          },
          child: child,
        );
      },
      theme: ThemeData(
        dividerTheme: const DividerThemeData(
          color: Color(0xF1F1F1FF),
          thickness: 1,      // 线高
          indent: 0,         // 左缩进
          endIndent: 0,      // 右缩进
        ),
        primarySwatch: Colors.blue,
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        inputDecorationTheme: const InputDecorationTheme(
          border: InputBorder.none,
          contentPadding: EdgeInsets.symmetric(horizontal: 8),
        ),
        snackBarTheme: const SnackBarThemeData(
          behavior: SnackBarBehavior.floating,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.all(Radius.circular(8)),
          ),
        ),
      ),
      // 根据登录状态决定初始页面
      home: isLoggedIn ? const MainPage() : const LoginPage(),
      debugShowCheckedModeBanner: false,
      routes: {
        '/login': (_) => const LoginPage(),
        // ... 其他路由
      },
    );
  }
}