您可以使用自定义的Navigator来满足这3个要求。

Flutter团队对此做了一个视频，下面是他们的文章：https :
//medium.com/flutter/getting-to-the-bottom-of-navigation-in-
flutter-b3e440b9386

基本上，您需要将脚手架的主体包装到一个自定义中Navigator：

class _MainScreenState extends State<MainScreen> {
  final _navigatorKey = GlobalKey<NavigatorState>();

  // ...

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Navigator(
        key: _navigatorKey,
        initialRoute: '/',
        onGenerateRoute: (RouteSettings settings) {
          WidgetBuilder builder;
          // Manage your route names here
          switch (settings.name) {
            case '/':
              builder = (BuildContext context) => HomePage();
              break;
            case '/page1':
              builder = (BuildContext context) => Page1();
              break;
            case '/page2':
              builder = (BuildContext context) => Page2();
              break;
            default:
              throw Exception('Invalid route: ${settings.name}');
          }
          // You can also return a PageRouteBuilder and
          // define custom transitions between pages
          return MaterialPageRoute(
            builder: builder,
            settings: settings,
          );
        },
      ),
      bottomNavigationBar: _yourBottomNavigationBar,
    );
  }
}

在底部导航栏中，只需使用以下命令即可导航到新custom中的新屏幕Navigator：

_navigatorKey.currentState.pushNamed('/yourRouteName');

为了实现第三个要求，这是Navigator.pop带你到一个视图，你将需要包装定制Navigator了WillPopScope：

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: WillPopScope(
      onWillPop: () async {
        if (_navigatorKey.currentState.canPop()) {
          _navigatorKey.currentState.pop();
          return false;
        }
        return true;
      },
      child: Navigator(
        // ...
      ),
    ),
    bottomNavigationBar: _yourBottomNavigationBar,
  );
}

就是这样！无需手动处理弹出或管理自定义历史记录列表。