[英]How to create a vertical fixed custom tab bar using container in flutter
您可以在下面复制粘贴运行完整代码
您可以使用NavigationRail
您可以更改NavigationRailDestination
的icon
和selectedIcon
icon
和selectedIcon
接受widget
,因此您可以根据您的请求使用Column
wrap icon
和Text
代码片段
NavigationRail(
selectedIndex: _selectedIndex,
onDestinationSelected: (int index) {
setState(() {
_selectedIndex = index;
});
},
labelType: NavigationRailLabelType.selected,
destinations: [
NavigationRailDestination(
icon: Column(
children: [Icon(Icons.favorite_border), Text('Button 1')],
),
selectedIcon: Container(
color: Colors.green,
child: Column(
children: [Icon(Icons.favorite_border), Text('Button 1')],
),
),
label: Text(""),
),
NavigationRailDestination(
icon: Column(
children: [Icon(Icons.bookmark_border), Text('Button 2')],
),
selectedIcon: Column(
children: [Icon(Icons.book), Text('2 clicked')],
),
label: Text(''),
),
NavigationRailDestination(
icon: Icon(Icons.star_border),
selectedIcon: Icon(Icons.star),
label: Text('Third'),
),
],
),
工作演示
完整代码
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
/// This is the main application widget.
class MyApp extends StatelessWidget {
static const String _title = 'Flutter Code Sample';
@override
Widget build(BuildContext context) {
return MaterialApp(
title: _title,
home: MyStatefulWidget(),
);
}
}
/// This is the stateful widget that the main application instantiates.
class MyStatefulWidget extends StatefulWidget {
MyStatefulWidget({Key key}) : super(key: key);
@override
_MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}
/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _selectedIndex = 0;
@override
Widget build(BuildContext context) {
return Scaffold(
body: Row(
children: <Widget>[
NavigationRail(
selectedIndex: _selectedIndex,
onDestinationSelected: (int index) {
setState(() {
_selectedIndex = index;
});
},
labelType: NavigationRailLabelType.selected,
destinations: [
NavigationRailDestination(
icon: Column(
children: [Icon(Icons.favorite_border), Text('Button 1')],
),
selectedIcon: Container(
color: Colors.green,
child: Column(
children: [Icon(Icons.favorite_border), Text('Button 1')],
),
),
label: Text(""),
),
NavigationRailDestination(
icon: Column(
children: [Icon(Icons.bookmark_border), Text('Button 2')],
),
selectedIcon: Column(
children: [Icon(Icons.book), Text('2 clicked')],
),
label: Text(''),
),
NavigationRailDestination(
icon: Icon(Icons.star_border),
selectedIcon: Icon(Icons.star),
label: Text('Third'),
),
],
),
VerticalDivider(thickness: 1, width: 1),
// This is the main content.
Expanded(
child: Center(
child: Text('selectedIndex: $_selectedIndex'),
),
)
],
),
);
}
}
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