如何解决如何创建ToggleButton效果?
我希望按钮按下后可以更改其颜色。另外,在点击另一个按钮后,该按钮应恢复正常。我以前尝试过ToggleButton小部件,但看起来并不像我想要的那样。
是否可以通过FlatButton实现相同的功能?
解决方法
存储所选项目;
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',theme: ThemeData(
primarySwatch: Colors.blue,),home: Scaffold(
body: SafeArea(
child: MyHomePage(),);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int selected;
@override
Widget build(BuildContext context) {
return Column(
children: [
_Bar(
onPressed: onPressed,selected: selected,Text('selected: $selected'),],);
}
void onPressed(int index) {
setState(() {
selected = selected == index ? null : index;
});
}
}
class _Bar extends StatelessWidget {
const _Bar({
Key key,this.onPressed,this.selected,}) : super(key: key);
final void Function(int selectedIndex) onPressed;
final int selected;
@override
Widget build(BuildContext context) {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,children: [
_button(Icons.select_all,0),_button(Icons.edit,1),_button(Icons.stars,2),);
}
Widget _button(IconData iconData,int index) {
return GestureDetector(
onTap: () => onPressed(index),child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(7),color: selected == index ? Colors.red : Colors.grey,width: 50,height: 30,child: Icon(iconData),);
}
}
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