如何使用多个导航器

您可以为每个页面创建新的导航器。作为参考，请检查CupertinoTabView

还是简单的例子：

import 'package:flutter/material.dart';class Home extends StatelessWidget {  Navigator _getNavigator(BuildContext context) {    return new Navigator(      onGenerateRoute: (RouteSettings settings) {        return new MaterialPageRoute(builder: (context) {          return new Center( child: new Column(   mainAxisSize: MainAxisSize.min,   children: <Widget>[     new Text(settings.name),     new FlatButton(       onPressed: () =>Navigator.pushNamed(context, "${settings.name}/next"),       child: new Text('Next'),     ),     new FlatButton(       onPressed: () =>Navigator.pop(context),       child: new Text('Back'),     ),   ], ),          );        });      },    );  }  @override  Widget build(BuildContext context) {    return new Scaffold(      body: new Column(        children: <Widget>[          new Expanded( child: _getNavigator(context),          ),          new Expanded( child: _getNavigator(context),          ),        ],      ),    );  }}void main() {  runApp(new MaterialApp(    home: new Home(),  ));}