flutter - 如何将 Tabcontroller 从主页发送到颤动的内容页面?
问题描述
如何将 Tabcontroller 从主页发送到内容页面?
我有一个主页并实现了一个带有标签内容的内容页面。问题是如何将首页创建的控制器分享或发送到第二页的标签页?
解决方案
您可以使用导航器传递选项卡控制器
代码片段
Navigator.push(context, MaterialPageRoute(builder: (context) => SecondPage(tabController: tabController,)));
...
class SecondPage extends StatefulWidget {
final TabController tabController;
// In the constructor, require a Person
SecondPage({Key key, @required this.tabController}) : super(key: key);
在第二页中,使用widget.tabController
完整代码
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
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> with SingleTickerProviderStateMixin{
int _counter = 0;
TabController tabController;
@override
void initState() {
tabController = new TabController(length: 3, vsync: this);
super.initState();
}
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>[
RaisedButton(
onPressed: () {
Navigator.push(context, MaterialPageRoute(builder: (context) => SecondPage(tabController: tabController,)));
},
child: Text(
'Second Page',
style: TextStyle(fontSize: 20)
),
),
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.
);
}
}
class SecondPage extends StatefulWidget {
final TabController tabController;
// In the constructor, require a Person
SecondPage({Key key, @required this.tabController}) : super(key: key);
@override
_SecondPageState createState() => _SecondPageState();
}
class _SecondPageState extends State<SecondPage> with SingleTickerProviderStateMixin{
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text("GrubX"),
bottom: TabBar(
unselectedLabelColor: Colors.white,
labelColor: Colors.amber,
tabs: [
new Tab(icon: new Icon(Icons.call)),
new Tab(
icon: new Icon(Icons.chat),
),
new Tab(
icon: new Icon(Icons.notifications),
)
],
controller: widget.tabController,
indicatorColor: Colors.white,
indicatorSize: TabBarIndicatorSize.tab,),
bottomOpacity: 1,
),
body: TabBarView(
children: [
new Text("This is call Tab View"),
new Text("This is chat Tab View"),
new Text("This is notification Tab View"),
],
controller: widget.tabController,),
);
}
}
推荐阅读
- algorithm - 甘特图问题的算法/编程方法
- android - 当其他应用播放媒体时暂停和恢复音乐
- javascript - 隐藏 ngx-plyr 控件
- swift - 迅速。如何在 XCODE 中正确编写数据结构
- linux - 遍历文件并计算对数和指数函数
- python - Boto3 SQS send_message 似乎忽略了大部分 QueryUrl url 部分
- python - 如何确定 Python 中 Win10 UAC 提示符中的内容?
- java - 优化 n^2 循环内的合并查询
- node.js - 删除bulmq中特定的可重复作业(使用jobid)
- git - 完成发布时我应该写什么作为标签消息?