用法：如果是把png直接导入flash转换成影片剪辑，只需在影片剪辑属性中勾选为ActionScript导出(x)，并把基类里的flash.display.MovieClip替换成InteractivePNG即可；如果是外部导入png，只需将存放png的类继承InteractivePNG即可；

1 package  2 { 3     import flash.display.Loader; 4     import flash.display.MovieClip; 5     import flash.display.Shape; 6     import flash.display.Sprite; 7     import flash.events.Event; 8     import flash.events.MouseEvent; 9     import flash.filters.DropShadowFilter;10     import flash.net.URLRequest;11 12     /**13       * ...14       * @author Frost.Yen15       */16     public class TestPNG extends Sprite17     {18         private var pngSp:PNGContainer;19         private var ldr:Loader = new Loader  ;20         private var lineSp:Sprite;21         private var frame:Shape = new Shape  ;22         public function TestPNG()23         {24 25             lineSp = new Sprite  ;26             pngSp = new PNGContainer  ;27             pngSp.x = pngSp.y = 200;28             this.addChild(lineSp);29             this.addChild(pngSp);30             pngSp.addEventListener(MouseEvent.MOUSE_OVER,onPNGOver);31             pngSp.addEventListener(MouseEvent.MOUSE_OUT,onPNGOut);32         }33 34         private function onPNGOver(e:MouseEvent):void35         {36             drawLine(pngSp);37         }38 39         private function onPNGOut(e:MouseEvent):void40         {41             this.removeChild(frame);42         }43 44         private function drawLine(_mc:MovieClip)45         {46             frame.graphics.clear();47             frame.graphics.moveTo(_mc.x,_mc.y);48             frame.graphics.lineStyle(1,0xff00ff);49             frame.graphics.lineTo(_mc.x + _mc.width,_mc.y);50             frame.graphics.moveTo(_mc.x + _mc.width,_mc.y);51             frame.graphics.lineTo(_mc.x + _mc.width,_mc.y + _mc.height);52             frame.graphics.moveTo(_mc.x + _mc.width,_mc.y + _mc.height);53             frame.graphics.lineTo(_mc.x,_mc.y + _mc.height);54             frame.graphics.moveTo(_mc.x,_mc.y + _mc.height);55             frame.graphics.lineTo(_mc.x,_mc.y);56             addChild(frame);57         }58     }59 }

1 package  2 { 3     import flash.display.Loader; 4     import flash.events.Event; 5     import flash.net.URLRequest; 6  7     /** 8       * ... 9       * @author Frost.Yen10       */11     public class PNGContainer extends InteractivePNG12     {13         private var ldr:Loader = new Loader  ;14         public function PNGContainer()15         {16             ldr.load(new URLRequest("128.png"));17             ldr.contentLoaderInfo.addEventListener(Event.COMPLETE,onPNGLoaded);18         }19 20         private function onPNGLoaded(e:Event):void21         {22             this.addChild(e.target.content);23         }24     }25 26 }

InteractivePNG.as类可以到下载