在actionscript中获取图像原始宽度和高度

import flash.display.Loader;
import flash.net.URLRequest;

var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onImageLoadComplete);
loader.load(new URLRequest("path/to/image.jpg"));

function onImageLoadComplete(event:Event):void {
    var imageWidth:Number = event.target.width;
    var imageHeight:Number = event.target.height;
    trace("Image width: " + imageWidth + ", Image height: " + imageHeight);
}