FLEX 图片切割

 protected function loadImage(file:String):void{
  
   var loader:Loader = new Loader();
   loader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeHandler);
   var request:URLRequest = new URLRequest(file);
   loader.load(request);
  }
  
  protected function completeHandler(e:Event):void{
  
   //var image:Bitmap = e.target.loader.content as Bitmap;
   //与此 LoaderInfo 对象关联的已加载对象。
   var image:Bitmap = e.target.content as Bitmap;
   //切片的高和宽
   var itemWidth:Number = image.width/4;
   var itemHeight:Number = image.height/2;
   
   for(var i:int = 0;i<4;i++){
    for(var j:int = 0;j<2;j++){
     //创建位图
       var itemBitmap:Bitmap = new Bitmap(new BitmapData(itemWidth,itemHeight),"auto",true);
       //在目标 BitmapData 对象的目标点将源图像的矩形区域复制为同样大小的矩形区域。
       itemBitmap.bitmapData.copyPixels(image.bitmapData,new Rectangle(i*itemWidth,j*itemHeight,itemWidth,itemHeight),new Point(0,0));
       var sprite:Sprite = new Sprite();
       sprite.addChild(itemBitmap);
      
       addChild(sprite);
      
       sprite.x =i*(itemWidth+5)+20;
       sprite.y = j*(itemHeight+5)+20;
    }
   }
   
  }