需求是这样的,需要批处理一些信息条目,每条信息有相应的radiobutton,选是还是否操作。由于要求的样式比较花俏,用datagrid无法满足,就考虑用repeater来做。关于radiobutton的样式,能想到的如下(每组radiobutton点选互不影响):
<mx:HBox>
?<mx:RadioButtonGroup id="group"/>
<mx:RadioButton group="group" id="yes"/>
<mx:RadioButton group="group" id="no"/>
</mx:HBox>
定义一个群组id,单个radiobutton指定群组id,而后用repeater组件进行循环。对于一般组件,如Label、Text等,定义了id进行repeater是不会出问题的,但是对于RadioButtonGroup ,会报如下错误:
?Unable to generate initialization code within Repeater,due to id or data binding on a component that is not a visual child.
在网上搜索了一下,对于radiobutton使用repeater的人,都有这个疑惑,后来总算在英文网站是找了一个解决办法,如下文:
http://www.jonathanrowny.com/journal/radiobuttongroup-inside-repeater
原理是根据数据源大小生成一个radiobuttongroup数组,而后repeater的时候,根据repeater的index从该数组中取相应的group绑定到radiobutton,实现radiobutton各组操作分离,互不影响。
在此基础上,做了一个扩展实例,模拟演示,可以初始得到每组radiobutton的初始值,以及点击时,可以分别得到每组radiobutton的值。
?
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.controls.RadioButtonGroup;
import mx.controls.RadioButton;
import mx.controls.Label;
import mx.collections.ArrayCollection;
[Bindable]
private var rbGroups:ArrayCollection;
[Bindable]
public var myArray:Array=[{男: "yes",女: "no"},{男: "yes",{男: "no",女: "yes"},女: "yes"}];
/**
* 通过数组初始值,判断选择。
*/
private function isSelect(item:Object):Boolean
{
if (item.男 == "yes")
{
return true;
}
else
{
return false;
}
}
/**
* 根据数据源建立一个radiobuttongroup组
*/
private function createRBGroups():void
{
rbGroups=new ArrayCollection();
var rbGroup:RadioButtonGroup;
for each (var item:Object in someRepeater.dataProvider as ArrayCollection)
{
rbGroup=new RadioButtonGroup();
rbGroups.addItem(rbGroup);
}
}
/**
* 单击某组radiobutton,显示相应值
*/
private function showSex(event:Event):void
{
var radio:RadioButton=event.currentTarget as RadioButton;
event.currentTarget.parent.parent.getChildByName("sexShow").text="This is a " + radio.label;
}
/**
* 单击某组radiobutton,显示相应值
*/
private function showDefault(item:Object):String
{
if (item.男 == "yes")
{
return "男";
}
else
{
return "女";
}
}
]]>
</mx:Script>
<mx:Panel width="100%"
height="500">
<mx:Repeater repeatStart="createRBGroups()"
id="someRepeater"
dataProvider="{myArray}">
<mx:VBox>
<mx:HBox>
<mx:RadioButton id="male"
group="{RadioButtonGroup(rbGroups.getItemAt(someRepeater.currentIndex))}"
label="男"
selected="{isSelect(someRepeater.currentItem)}"
click="{showSex(event)}"/>
<mx:RadioButton id="female"
group="{RadioButtonGroup(rbGroups.getItemAt(someRepeater.currentIndex))}"
label="女"
selected="{!isSelect(someRepeater.currentItem)}"
click="{showSex(event)}"/>
</mx:HBox>
<mx:Label id="sexShow"
width="120" text="This is a {showDefault(someRepeater.currentItem)}"/>
</mx:VBox>
<mx:HRule width="100%"/>
</mx:Repeater>
</mx:Panel>
</mx:Application>
示例如下图
