作者：包千卿_413 | 来源：互联网 | 2023-09-14 20:08
Radio组件Radio组件的常用属性：属性描述value单选的值onChanged改变时触发activeColor选中的颜色、背景颜色groupValue选择组的值 impo
Radio组件的常用属性：
| 属性 |
描述 |
| value |
单选的值 |
|
onChanged
|
改变时触发
|
|
activeColor
|
选中的颜色、背景颜色
|
|
groupValue
|
选择组的值
|
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
title: "Radio",
home: MyApp(),
));
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State {
int sex = 1;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("Radio")),
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text("男："),
Radio(
value: 1,
groupValue: this.sex,
onChanged: (value) {
setState(() {
this.sex = value;
});
},
),
SizedBox(width: 20),
Text("女："),
Radio(
value: 2,
groupValue: this.sex,
onChanged: (value) {
setState(() {
this.sex = value;
});
},
)
],
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text("你选择的是${this.sex == 1 ? "男" : "女"}")
],
)
],
),
);
}
}
RadioListTile组件常用的属性：
| 属性 |
描述 |
| value |
true 或者 false
|
|
onChanged
|
改变的时候触发的事件
|
|
activeColor
|
选中的颜色、背景颜色
|
|
title
|
标题
|
|
subtitle
|
二级标题
|
|
secondary
|
配置图标或者图片
|
|
groupValue
|
选择组的值
|
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
title: "RadioListTile",
home: MyApp(),
));
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State {
int sex = 1;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("RadioListTile")),
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
RadioListTile(
value: 1,
onChanged: (value) {
setState(() {
this.sex = value;
});
},
groupValue: this.sex,
title: Text("一级标题"),
subtitle: Text("二级标题"),
secondary: Icon(Icons.camera),
selected: this.sex == 1,
),
RadioListTile(
value: 2,
onChanged: (value) {
setState(() {
this.sex = value;
});
},
groupValue: this.sex,
title: Text("一级标题"),
subtitle: Text("二级标题"),
secondary: Icon(Icons.palette),
selected: this.sex == 2,
),
],
),
);
}
}
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