flutter_tracker/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_tracker/pages/welcome_page.dart';
import 'package:flutter_tracker/routes/routes.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'index_page.dart';
import 'model/config.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  Config.initConfig();
  SharedPreferences sharedPreferences = await SharedPreferences.getInstance();
  bool isLogin = sharedPreferences.getBool("isLogin");
  isLogin ??= false;

  runApp(MyApp(
    isLogin: isLogin,
  ));
}

class MyApp extends StatelessWidget {
  bool isLogin = false;

  MyApp({Key key, this.isLogin}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return ScreenUtilInit(
      designSize: const Size(750, 1344),
      builder: () => MaterialApp(
        title: '追踪者',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        debugShowCheckedModeBanner: false,
        home: isLogin ? IndexPage() : WelComePage(),
        onGenerateRoute: Routes.generateRoute,
      ),
    );
  }
}