Question

我有一个TabBarView，其中包含4个标签。它们都有一个可用于导航到另一条路线的按钮，但是导航是在选项卡本身中完成的，即选项卡式的Appbar仍然存在，如何在没有选项卡式Appbar的情况下导航至那些路线。

编辑：在主页上，有一些按钮可将用户带到“选项卡式页面”， TabBarView在该页面上具有传递了不同字符串的页面2，现在页面2用于调用一个小部件，该小部件验证用户的登录，注销和填充并返回正确的小部件。当用户登录时，有一个Fab将其带到新路线，现在该路线仍在我要更改的选项卡式视图中导航。

TabbedView

 home: DefaultTabController(
    length: 4,
    child: Scaffold(
      appBar: AppBar(
        bottom: TabBar(
          tabs: [
            Tab(text: ("Numbers")),
            Tab(text: ("Relationship")),
            Tab(text: ("Word")),
            Tab(text: ("Sentence"))
          ],
        ),
       ------
       ------

      ),
    ),
  ),

      ),
      body: TabBarView(
        children: [
          Page2("Number" ),
          Page2("Relationship"),
          Page2("Word"),
          Page2("Sentence"),
        ],
      ),
    ),
  ),
);

Page2

return new MaterialApp(
    theme: new ThemeData(
      primarySwatch: Colors.blue,
    ),
      home: new Scaffold(
       body: new RootPage(auth: new Auth()
    )
  )
);

OnloggedIn

return new HomePage(
        userId: _userId,
        auth: widget.auth,
        onSignedOut: _onSignedOut,
      );

Fab

return new Scaffold(
-----
-----
floatingActionButton: FloatingActionButton(
      onPressed: () {
        //_showDialog(context);
        Navigator.push(context, MaterialPageRoute(builder: (context)=>Levels(
          auth: widget.auth,
          userId: widget.userId,
          onSignedOut: widget.onSignedOut,
        )),);
      },

Answer 1

您可以使用Scaffold包裹这些目标页面或路线
代码段

@override
  Widget build(BuildContext context) {      
    return Scaffold(
      appBar: AppBar(           
        title: Text(widget.title),
      ),
      body: Center(

完整代码

import 'package:flutter/material.dart';

void main() {
  runApp(AppBarBottomSample());
}

class AppBarBottomSample extends StatefulWidget {
  @override
  _AppBarBottomSampleState createState() => _AppBarBottomSampleState();
}

class _AppBarBottomSampleState extends State<AppBarBottomSample>
    with SingleTickerProviderStateMixin {
  TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(vsync: this, length: choices.length);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: 6,
        child: Scaffold(
          appBar: AppBar(
            title: const Text('AppBar Bottom Widget'),
            bottom: TabBar(
              tabs: [
                Tab(icon: Icon(Icons.directions_car)),
                Tab(icon: Icon(Icons.directions_bike)),
                Tab(icon: Icon(Icons.directions_boat)),
                Tab(icon: Icon(Icons.directions_bus)),
                Tab(icon: Icon(Icons.directions_railway)),
                Tab(icon: Icon(Icons.directions_walk)),
              ],
              controller: _tabController,
              isScrollable: true,
            ),
          ),
          body: TabBarView(
            controller: _tabController,
            children: choices.map((Choice choice) {
              return Padding(
                padding: const EdgeInsets.all(16.0),
                child: ChoiceCard(choice: choice),
              );
            }).toList(),
          ),
        ),
      ),
    );
  }
}

class Choice {
  const Choice({this.title, this.icon});

  final String title;
  final IconData icon;
}

const List<Choice> choices = const <Choice>[
  const Choice(title: 'CAR', icon: Icons.directions_car),
  const Choice(title: 'BICYCLE', icon: Icons.directions_bike),
  const Choice(title: 'BOAT', icon: Icons.directions_boat),
  const Choice(title: 'BUS', icon: Icons.directions_bus),
  const Choice(title: 'TRAIN', icon: Icons.directions_railway),
  const Choice(title: 'WALK', icon: Icons.directions_walk),
];

class ChoiceCard extends StatelessWidget {
  const ChoiceCard({Key key, this.choice}) : super(key: key);

  final Choice choice;

  @override
  Widget build(BuildContext context) {
    final TextStyle textStyle = Theme.of(context).textTheme.display1;
    return Card(
      color: Colors.white,
      child: Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            Icon(choice.icon, size: 128.0, color: textStyle.color),
            Text(choice.title, style: textStyle),
            RaisedButton(
              child: Text('Click Button '),
              onPressed: () {
                print('hi');
                Navigator.push(
                  context,
                  MaterialPageRoute(builder: (context) => MyHomePage(title: "hi",)),
                );
              },
            )
          ],
        ),
      ),
    );
  }
}



class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

Answer 2

我通过在TabBarView中删除Page2调用并直接调用rootpage来解决了这个问题。

从TabBarView子级导航到另一条路线（全屏）

2 个答案: