flex图片放大缩小（2）

 <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init();"> <mx:Script> <!--[CDATA[ //图片放大缩小 private function picZoomRate(size:Number):void{ img.width=Math.round(img.width*size); img.height=Math.round(img.height*size); } ]]--> </mx:Script> <mx:Button /> <mx:Button /> <mx:Canvas x="200" y="121" width="420" height="315" borderStyle="1"> <mx:Image /> </mx:Canvas> </mx:Application>