Flutter 自定义顶部导航栏(方法二)

文件结构: routes.dart import 'package:flutter/material.dart'; import '../pages/tabs.dart'; import '../pages/AppBarDemo.dart'; import '../pages/TabBarController.dart'; final routes = { '/': (context) => Tabs(), '/appBarDemo':(context)=>AppBarDemoPage(), '/tabBarController':(context)=>TabBarContro