[Flutter]TabBar

class MyApp extends StatelessWidget {
  final List<Tab> myTabs = <Tab>[
    Tab(text: '第一頁'),
    Tab(text: '第二頁'),
    Tab(text: '第三頁'),
  ];

  final pages = [One(), Two(), Three()];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: myTabs.length,
        child: Scaffold(
          appBar: AppBar(
            title: Text("TabBarDemo"),
            bottom: TabBar(
              tabs: myTabs,
            ),
          ),
          body: TabBarView(
            children: <Widget>[One(), Two(), Three()],
          ),
        ),
      ),
    );
  }
}