November 11th, 2009 
Marvin Blase This one-of-will-be-many-articles is covering the first steps of loading and unloading SWFs properly in Actionscript 3. The follow-up articles will discuss dynamical loading-managements, bulk loading and general questions about caching, the garbage collector and the likes. Well, as said we'll just talking about simple load and a clean unload, as I want to give beginners the chance to follow the upcoming ones and maybe get interested in improving their loading-techniques - as there is much you don't know yet about behind the scenes ;-)
For those interested in loading multiple SWFs and displaying it on click check out #2 of this article series.
The finer Art of Loading (#2): Simple load and display multiple SWFs
So without many words here's the snippet - I hope it is pretty self-explaining. It's written to be directly on a frame in your timeline - as I guess the guys using external classes can adept this snippet for their use, don't they? :) Since FP10 has released many things have been simplified as the unloadAndStop()-method does a good job.
Here we go:
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var _swfLoader:Loader;
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var _swfContent:MovieClip;
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loadSWF("01.swf");
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function loadSWF(path:String):void {
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var _req:URLRequest = new URLRequest();
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_req.url = path;
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_swfLoader = new Loader();
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setupListeners(_swfLoader.contentLoaderInfo);
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_swfLoader.load(_req);
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}
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function setupListeners(dispatcher:IEventDispatcher):void {
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dispatcher.addEventListener(Event.COMPLETE, addSWF);
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dispatcher.addEventListener(ProgressEvent.PROGRESS, preloadSWF);
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}
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function preloadSWF(event:ProgressEvent):void {
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var _perc:int = (event.bytesLoaded / event.bytesTotal) * 100;
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// swfPreloader.percentTF.text = _perc + "%";
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}
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function addSWF(event:Event):void {
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event.target.removeEventListener(Event.COMPLETE, addSWF);
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event.target.removeEventListener(ProgressEvent.PROGRESS, preloadSWF);
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_swfContent = event.target.content;
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_swfContent.addEventListener("close", unloadSWF);
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addChild(_swfContent);
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}
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function unloadSWF(event:Event):void {
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_swfLoader.unloadAndStop();
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removeChild(_swfContent);
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_swfContent = null;
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}
A short addition as many have asked: To dispatch the Event in the loaded SWF just use the following code within your loaded SWF:
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var _closeEvent:Event = new Event("close", true, false);
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closeBtn.addEventListener(MouseEvent.CLICK, dispatchUnload);
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function dispatchUnload(event:MouseEvent):void {
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dispatchEvent(_closeEvent);
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}
Feel free to ask if any line is not clear or making sense :)
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i need to load second file after the first file was completely loaded. can any one help
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