flutter_tzh/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_tzh/base/YSTabBar.dart';
import 'package:flutter_tzh/login/YSLogin.dart';
import 'package:flutter_tzh/tool/YSLocalization.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() async{
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light.copyWith(statusBarColor: Colors.transparent));
  SharedPreferences prefs = await SharedPreferences.getInstance();
  String? token = prefs.getString('token');
  bool isLogin = token==null?false:true;
  runApp(MyApp(isLogin: isLogin,));
}

class MyApp extends StatelessWidget {
  final bool isLogin;
  const MyApp({Key? key, required this.isLogin}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return ScreenUtilInit(
      designSize: const Size(375, 812),
      minTextAdapt: true,
      splitScreenMode: true,
      builder: (BuildContext context, Widget? child) {
        return MaterialApp(
          debugShowCheckedModeBanner: false,
          title: '碳中和',
          theme: ThemeData(
            primarySwatch: Colors.blue,
          ),
          localizationsDelegates: const [
            ZhCupertinoLocalizations.delegate,
            GlobalMaterialLocalizations.delegate,
            GlobalWidgetsLocalizations.delegate,
            GlobalCupertinoLocalizations.delegate,
          ],
          supportedLocales: const [
            Locale('zh', 'CH'),
            Locale('en', 'US'),
          ],
          home: isLogin?const YSTabBar():const YSLogin(),
        );
      },
    );
  }
}