【AS3代码】制作加载资源进度小例子

package
{
    import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.ProgressEvent;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.text.TextField;
    
    public class Main extends Sprite
    {    
        var xmlUrl:URLRequest = new URLRequest("http://cidian.youdao.com/download/YoudaoDict.exe");
        var xmlLoader:URLLoader = new URLLoader(xmlUrl);
        var txt:TextField = new TextField();
        
        public function Main():void
        {
            init();
        }
        private function init():void
        {
            //资源正在加载
            xmlLoader.addEventListener(ProgressEvent.PROGRESS, progressHanlder);
            
            //若资源加载完成
            xmlLoader.addEventListener(Event.COMPLETE, completeHandler);
            
            txt.width = 300;
            this.addChild(txt);
        }
        
        
        private function progressHanlder(event:ProgressEvent):void
        {
            //已加载的字节数
            var movieBytesLoaded:int = xmlLoader.bytesLoaded;
            var movieKLoaded:int = movieBytesLoaded / 1024;
            
            //加载对象的总字节数
            var movieBytesTotal:int = xmlLoader.bytesTotal;            
            var movieKTotal:int = movieBytesTotal / 1024;
            
            txt.text = "已加载:" + movieKLoaded + "KB / 总大小:" + movieKTotal + "KB";
        }
        
        private function completeHandler(event:Event):void
        {
            trace("资源加载完成!");
        }
    }
}