Flex中如何通过监听numRadioButtonsChanged事件监测RadioButtonGroup中RadioButton发生变化的例子

By Minidxer | May 20, 2009

接下来的例子演示了Flex中如何通过监听numRadioButtonsChanged事件，监测RadioButtonGroup中RadioButton发生变化。

让我们先来看一下Demo（可以右键View Source或点击这里察看源代码）：

下面是完整代码(或点击这里察看)：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white"
initialize="init();">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
private function init():void {
radioGroup.addEventListener("numRadioButtonsChanged", radioGroup_numRadioButtonsChanged);
}
private function radioGroup_numRadioButtonsChanged(evt:Event):void {
var rb:RadioButton = radioGroup.getRadioButtonAt(radioGroup.numRadioButtons-1);
var alert:Alert = Alert.show(evt.toString(), "label:" + rb.label);
alert.status = "numRadioButtons:" + radioGroup.numRadioButtons;
}
]]>
</mx:Script>
<mx:RadioButtonGroup id="radioGroup" />
<mx:HBox>
<mx:RadioButton id="radioButton1" label="Red" group="{radioGroup}" />
<mx:RadioButton id="radioButton2" label="Orange" group="{radioGroup}" />
<mx:RadioButton id="radioButton3" label="Yellow" group="{radioGroup}" />
<mx:RadioButton id="radioButton4" label="Green" group="{radioGroup}" />
<mx:RadioButton id="radioButton5" label="Blue" group="{radioGroup}" />
</mx:HBox>
</mx:Application>

代码：Peter deHaan 翻译/整理/编译：中文Flex例子

Topics: RadioButton, RadioButtonGroup | No Comments » | 896 views Tags: numRadioButtonsChanged, RadioButton, RadioButtonGroup

中文Flex例子