运行时改变button的属性

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">

        <mx:Script>

  <![CDATA[

   [Embed(source="assets/icons/curve.png")]

   [Bindable]

    private var imgFunnelAddClass:Class;

   [Embed(source="assets/icons/ellipseFilled.png")]

   [Bindable] private var imgFunnelDeleteClass:Class;

 

   private var flag:Boolean = false;

 

   private function test():void{

 

    if (flag = !flag) {

             testBtn.styleDeclaration.setStyle("icon",imgFunnelDeleteClass);

    } else {

             testBtn.styleDeclaration.setStyle("icon",imgFunnelAddClass);  

    }

   }

 

  ]]>

</mx:Script>

<mx:Button id="testBtn" icon="{imgFunnelAddClass}" width="20" height="20" click="test()" />

</mx:Application>