as3外部加载的图片转换成MovieClip元件

Question

将从外部加载的图片转换成MovieClip元件，我代码这样写的

var req:URLRequest = new URLRequest("F:\\1.png");
var loader:Loader=new Loader();
loader.load(req);
var mc:MovieClip = loader as MovieClip;
stage.addChildAt(mc,0); 

报错说addChild参数为空，这个到底要怎么做？

Answer 1

var container:MovieClip = new MovieClip();
addChild(container);
var pictLdroader = new Loader();
var pictURL:String = "photo/1.jpg"
var pictURLReq:URLRequest = new URLRequest(pictURL);
pictLdr.load(pictURLReq);
container.addChild(pictLdr);
那现在pictLdr这个东东就是MovieClip对像了吗？