自定义appbarTitle 使用tabBar+ tabBarView实现类似安卓tabHost viewpager

import 'package:flutter/material.dart';

class TabBarDemo extends StatefulWidget {
    
    
  const TabBarDemo({
    
    Key? key}) : super(key: key);

  @override
  State<TabBarDemo> createState() => _TabBarDemoState();
}

class _TabBarDemoState extends State<TabBarDemo>
    with SingleTickerProviderStateMixin {
    
    
  TabController? myTabBarController;
  List<Widget> tabs = [];

  createTabs() {
    
    
    tabs.add(const Tab(text: "新闻", icon: Icon(Icons.ice_skating)));
    tabs.add(const Tab(text: "首页", icon: Icon(Icons.home)));
    tabs.add(const Tab(text: "邮箱", icon: Icon(Icons.mail)));
    tabs.add(const Tab(text: "新闻1", icon: Icon(Icons.ice_skating)));
    tabs.add(const Tab(text: "首页1", icon: Icon(Icons.home)));
    tabs.add(const Tab(text: "邮箱1", icon: Icon(Icons.mail)));
    tabs.add(const Tab(text: "新闻2", icon: Icon(Icons.ice_skating)));
    tabs.add(const Tab(text: "首页2", icon: Icon(Icons.home)));
    tabs.add(const Tab(text: "邮箱2", icon: Icon(Icons.mail)));

    return tabs;
  }

  createTabBar() {
    
    
    return TabBar(
      tabs: tabs,
      controller: myTabBarController,
      isScrollable: true,
      indicatorColor: const Color(0xffff0000),
      indicatorSize: TabBarIndicatorSize.tab,
      labelColor: Colors.deepOrange,
      labelStyle: const TextStyle(
          fontSize: 14, color: Colors.lime, fontWeight: FontWeight.bold),
      unselectedLabelColor: Colors.lightGreen,
      unselectedLabelStyle:
          const TextStyle( fontWeight: FontWeight.normal),
    );
  }

  @override
  void initState() {
    
    
    super.initState();
    createTabs();
    myTabBarController =
        TabController(initialIndex: 0, length: tabs.length, vsync: this);
  }

  @override
  Widget build(BuildContext context) {
    
    
    return Scaffold(
      appBar: AppBar(
        title: createTabBar(),
      ),
      body: TabBarView(
        controller: myTabBarController,
        children: const [
          Text("1"),
          Text("2"),
          Text("3"),
          Text("1"),
          Text("2"),
          Text("3"),
          Text("1"),
          Text("2"),
          Text("3")
        ],
      ),
    );
  }
}