flex 制作图片淡入淡出

?<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx=" http://ns.adobe.com/mxml/2009" ????? xmlns:s="library://ns.adobe.com/flex/spark" ????? xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"> ?<s:layout> ??<s:BasicLayout/> ?</s:layout> ?<fx:Script> ??<![CDATA[ ???import mx.effects.Fade; ???private function showImage():void ???{ ????var fade:Fade=new Fade(); ????fade.target=myImage; ????fade.alphaFrom=0; ????fade.alphaTo=1; ????fade.play(); ???} ???private function hideImage():void ???{ ????var fade:Fade=new Fade(); ????fade.target=myImage; ????fade.alphaFrom=1; ????fade.alphaTo=0; ????fade.play(); ???} ??]]> ?</fx:Script> ?<fx:Declarations> ?? ?</fx:Declarations> ?<s:VGroup> ??<s:HGroup> ???<s:BitmapImage id="myImage" source="@Embed('1.jpg')"/> ??</s:HGroup> ??<s:HGroup> ???<s:Button label="显示图片" click="showImage()"/> ???<s:Button label="隐藏图片" click="hideImage()"/> ??</s:HGroup> ?</s:VGroup> </s:Application>