Flutter 定义多Tabbar

import 'package:flutter/material.dart';
//定义结构话操作
class TabBarsController extends StatefulWidget {
  @override
  _TabBarsControllerState createState() => _TabBarsControllerState();
}

class _TabBarsControllerState extends State<TabBarsController> {
  @override
  Widget build(BuildContext context) {
    /**
     * 这个的结构必须是MaterilApp的下面和Scaffole的上面
     */
    return DefaultTabController(length: 4, child:Scaffold(
      appBar: AppBar(

          title: TabBar(
            tabs: <Widget>[
              Tab(text: 'de',),
              Tab(text: 'de',),
              Tab(text: 'de',),
              Tab(text: 'de',),

            ],
          ),
          // bottom:
      ),body: TabBarView(
      children:<Widget>[
        Text('de1'),
        Text('de2'),
        Text('de3'),
        Text('de4'),
      ],
    ),
    ));
  }
}