在flutter中从选项卡栏进行Push和Pop导航？

class TabBarPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Tab Bar'),
        bottom: TabBar(
          tabs: [
            Tab(text: 'Tab 1'),
            Tab(text: 'Tab 2'),
            Tab(text: 'Tab 3'),
          ],
        ),
      ),
      body: TabBarView(
        children: [
          Page1(),
          Page2(),
          Page3(),
        ],
      ),
    );
  }
}

class Page1 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: RaisedButton(
        child: Text('Go to Page 2'),
        onPressed: () {
          Navigator.push(
            context,
            MaterialPageRoute(builder: (context) => Page2()),
          );
        },
      ),
    );
  }
}

class Page2 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Page 2')),
      body: Center(
        child: RaisedButton(
          child: Text('Go to Page 3'),
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(builder: (context) => Page3()),
            );
          },
        ),
      ),
    );
  }
}

class Page3 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Page 3')),
      body: Center(
        child: RaisedButton(
          child: Text('Go back'),
          onPressed: () {
            Navigator.pop(context);
          },
        ),
      ),
    );
  }
}

void main() {
  runApp(
    MaterialApp(
      home: DefaultTabController(
        length: 3,
        child: TabBarPage(),
      ),
    ),
  );
}