在as3中使用到外部SWF文件做为资源库，通常是用ApplicationDomain类的getDefinition()来得到类定义，
再进行实例化。SWFLibrary类对这一方法封装，让调用外部资源库更通简单易用。
// 建立SWFLibrary类的实例, 添加侦听器和加载swf文件----creates an instance of SWFLibrary, adds a listener, and loads a SWF
var gameAssets:SWFLibrary = new SWFLibrary
gameAssets.addEventListener( Event.COMPLETE, handleAssetsLoaded );
gameAssets.load( "myCustomGameAssets.swf" );
function handleAssetsLoaded(){
// 访问资源----accesses the asset (assumes there is a symbol exported as 'Character' in the loaded SWF, as seen in step 1 above)
// 以下代码在上面的事件[Event.COMPLETE]触发时运行----this code should run after the Event above has fired
var mySprite:Sprite = gameAssets.getSprite( "Character" );
addChild( mySprite );
// 获取MovieClip资源----gets the asset as a MovieClip (assuming, of course, that it actually is a movieclip)
var myMC:MovieClip = gameAssets.getSprite( "Character" );
addChild( myMC );
// 获取声音元件----getting a sound
var mySound:Sound = gameAssets.getSound( "SoundLinkageNameHere" );
mySound.play();
}
SWFLibrary 下载
Usage
1 – In Flash, select “Export for ActionScript” in the symbol’s Linkage settings in the Library (ex. ‘Character’).
在Flash中，选择“作为ActionScript导出”，名称就是到时候要引用的那个，例如“Character”
2 – Publish the Flash file as a SWF.
发布成为swf
3 – Load the SWF into an instance of SWFLibrary
在SWFLibrary中加载
4 – Access the symbol through SWFLibrary, using the class name chosen in Step 1.
通过SWFLibrary，使用第一步里面的名称，就可以调用了