Flash/Flex学习笔记(13):如何做自定义Loading加载其它swf
const FILE_PATH:String="main.swf";
const CLASS_NAME:String="MainSwf";
?var loader:Loader;
var request:URLRequest;
?loader = new Loader();
?request=new URLRequest(FILE_PATH);
?loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,onProgress);
?loader.load(request);
?function onComplete(e:Event):void {?
var domain:ApplicationDomain=e.target.applicationDomain as ApplicationDomain;
?var swfClass:Class=domain.getDefinition(CLASS_NAME) as Class;
?var swfInstance:Sprite = (new swfClass()) as Sprite;
?swfInstance.x=0;
?swfInstance.y=0;
?//卸掉舞台上现有的东西????
?var _childCount = numChildren;
?for (var i:int=_childCount-1; i>=0; i--) {???????
?this.removeChildAt(i);??
?}???
?//加载刚下载的动画
?this.addChild(swfInstance);
?}
function onProgress(e:ProgressEvent) {
?//trace(e);
?label1.text = "正在加载," + e.bytesLoaded + " / " + e.bytesTotal + ", " + (Math.round(? (100 * e.bytesLoaded / e.bytesTotal) / 0.01) * 0.01) + " %";
?}
?stop();
解释:as3中每个fla都可以对应一个.as文件,用于实现代码界面分离,上面代码中的CLASS_NAME即为.as文件中定义的类名 
注意:如果在Main.fla中用到了系统组件(比如TileList之类),最好在Loading.fla中也拖一个出来到舞台上,然后删除,否则在loading中加载main的实例时,会出一些莫名其妙的问题!
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