as3中如何获取加载图片的信息

import flash.display.Loader;
import flash.net.URLRequest;
import flash.display.Bitmap;
import flash.events.Event;

var loader:Loader = new Loader();
loader.load(new URLRequest("pz1.jpg"));
// 加监听
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeHandler);
stage.addChild(loader);
function completeHandler(e:Event):void {
 var image:Bitmap = e.target.content;
 // 图片宽
 trace(image.width);
 // 图片高
 trace(image.height);
}

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​import flash.display.Loader;
import flash.net.URLRequest;
import flash.display.Bitmap;
import flash.events.Event;

var loader:Loader = new Loader();
loader.load(new URLRequest("pz1.jpg"));
// 加监听
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeHandler);
stage.addChild(loader);
function completeHandler(e:Event):void {
 var image:Bitmap = e.target.content;
 // 图片宽
 trace(image.width);
 // 图片高
 trace(image.height);
}