以下是我的代码,我尝试从底部导航栏按钮导航到下一个选项卡。请参阅模拟以获得理解。
代码:
class TabbedAppBarSample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: choices.length,
child: Scaffold(
floatingActionButtonLocation:
FloatingActionButtonLocation.centerDocked,
bottomNavigationBar: BottomAppBar(
notchMargin: 20,
child: new Row(
// mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Text(
'Next >',
style: TextStyle(fontSize: 20, color: Colors.red),
)
],
),
),
backgroundColor: Colors.white,
appBar: AppBar(
backgroundColor: Colors.white, // status bar color
brightness: Brightness.light,
title: TimerPage(),
bottom: TabBar(
// isScrollable: true,
indicatorColor: Colors.red,
unselectedLabelColor: Colors.grey,
labelColor: Colors.red,
tabs: choices.map((Choice choice) {
return Tab(
text: choice.title,
);
}).toList(),
),
),
body: TabBarView(
children: choices.map((Choice choice) {
return Padding(
padding: const EdgeInsets.all(6.0),
child: ChoiceCard(choice: choice),
);
}).toList(),
),
),
),
);
}
}
模拟:
此外,Idea可以通过滑动或单击下一步按钮进行导航。
使用TabController和animateTo您可以在下面查看完整的代码
代码段
@override
void initState() {
super.initState();
_tabController = TabController(vsync: this, length: 3);
}
void _toggleTab() {
_tabIndex = _tabController.index + 1;
_tabController.animateTo(_tabIndex);
}
...
bottomNavigationBar: BottomAppBar(
notchMargin: 20,
child: new Row(
// mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
InkWell(
onTap: () {
_toggleTab();
},
工作演示
完整代码
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appTitle = 'Tabs Demo';
return MaterialApp(
title: appTitle,
home: MyHomePage(title: appTitle),
);
}
}
class MyHomePage extends StatefulWidget {
final String title;
const MyHomePage({Key key, this.title}) : super(key: key);
@override
State<StatefulWidget> createState() {
return _MyHomePageState();
}
}
class _MyHomePageState extends State<MyHomePage>
with SingleTickerProviderStateMixin {
int _tabIndex = 0;
TabController _tabController;
@override
void initState() {
super.initState();
_tabController = TabController(vsync: this, length: 3);
}
void _toggleTab() {
_tabIndex = _tabController.index + 1;
_tabController.animateTo(_tabIndex);
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
bottomNavigationBar: BottomAppBar(
notchMargin: 20,
child: new Row(
// mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
InkWell(
onTap: () {
_toggleTab();
},
child: Text(
'Next >',
style: TextStyle(fontSize: 20, color: Colors.red),
),
)
],
),
),
appBar: AppBar(
title: Text(widget.title),
bottom: TabBar(
controller: _tabController,
tabs: [
Tab(text: 'Tab 1'),
Tab(text: 'Tab 2'),
Tab(text: 'Tab 3'),
],
),
),
body: TabBarView(
controller: _tabController,
children: [
Card(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTile(
leading: Icon(Icons.album),
title: Text('Hello 1'),
subtitle: Text('Click on Next Button to go to Tab 2.'),
),
],
),
),
Card(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTile(
leading: Icon(Icons.album),
title: Text('Hello 2'),
subtitle: Text('Click on Next Button to go to Tab 3'),
),
],
),
),
Card(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTile(
leading: Icon(Icons.album),
title: Text('Hello 3'),
subtitle: Text('The End'),
),
],
),
),
],
),
));
}
}