如何使用底部导航栏在flutter中的两个页面之间传递数据

Navigator.push(context, MaterialPageRoute(builder: (context) => PageB()));

class PageB extends StatelessWidget {
  final String data;

  PageB({this.data});

  // 其他代码...
}

Navigator.push(
  context,
  MaterialPageRoute(
    builder: (context) => PageB(data: "Hello from PageA"),
  ),
);

class PageB extends StatelessWidget {
  final String data;

  PageB({this.data});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('PageB'),
      ),
      body: Center(
        child: Text(data),
      ),
    );
  }
}

Scaffold(
  // 其他属性...
  bottomNavigationBar: BottomNavigationBar(
    items: [
      BottomNavigationBarItem(
        icon: Icon(Icons.home),
        label: 'PageA',
      ),
      BottomNavigationBarItem(
        icon: Icon(Icons.settings),
        label: 'PageB',
      ),
    ],
    onTap: (index) {
      if (index == 1) {
        Navigator.push(
          context,
          MaterialPageRoute(
            builder: (context) => PageB(data: "Hello from PageA"),
          ),
        );
      }
    },
  ),
);