Flash/Flex学习笔记(16)：如何做自定义Loading加载其它swf

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const FILE_PATH:String="main.swf";

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const CLASS_NAME:String="MainSwf";

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var loader:Loader;

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var request:URLRequest;

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loader = new Loader();

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request=new URLRequest(FILE_PATH);

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loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);

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loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,onProgress);

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loader.load(request);

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function onComplete(e:Event):void { 

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var domain:ApplicationDomain=e.target.applicationDomain as ApplicationDomain;

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var swfClass:Class=domain.getDefinition(CLASS_NAME) as Class;

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var swfInstance:Sprite = (new swfClass()) as Sprite;

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swfInstance.x=0;

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swfInstance.y=0;

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//卸掉舞台上现有的东西    

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var _childCount = numChildren;

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for (var i:int=_childCount-1; i>=0; i--) {       

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this.removeChildAt(i);  

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}   

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//加载刚下载的动画

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this.addChild(swfInstance);

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}

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function onProgress(e:ProgressEvent) {

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//trace(e);

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label1.text = "正在加载，" + e.bytesLoaded + " / " + e.bytesTotal + "， " + (Math.round(  (100 * e.bytesLoaded / e.bytesTotal) / 0.01) * 0.01) + " %";

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}

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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!