使用loader swf文件中的资源

简单使用loader 加载外部swf文档中的图片资源：

            import spark.primitives.BitmapImage;
            import mx.events.FlexEvent;
            
             private var _loader:Loader;
             private var _dataToLoad:LoaderInfo ;
            private var _context:LoaderContext;
             //加载外部swf

            protected function application1_creationCompleteHandler(event:FlexEvent):void
            {
                 _loader = new Loader();
                _loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loadCompleteHandler);
                _loader.load(new URLRequest("x.swf"),_context);
            }
            
            private function loadCompleteHandler(e:Event):void
            {
                trace("complete");
                 var img:BitmapImage = new BitmapImage();
                var dataClass:Class = _loader.contentLoaderInfo.applicationDomain.getDefinition("classname") as Class ;
                img.source = new dataClass(0,0) as BitmapData;
                this.addElement(img);
            }

简单实用loader加载swf当中的movieClip文件




package
{
            import flash.display.Loader;
            import flash.display.LoaderInfo;
            import flash.display.MovieClip;
            import flash.display.Sprite;
            import flash.events.Event;
            import flash.net.URLRequest;
            import flash.system.ApplicationDomain;
            import flash.system.LoaderContext;
            import flash.system.SecurityDomain;

    public class loader2 extends Sprite
    {
             private var _loader:Loader;
             private var _dataToLoad:LoaderInfo ;
            private var _context:LoaderContext;
            
            public function loader2()
            {
                startLoader();
            }
            
            protected function startLoader():void
            {
                 _loader = new Loader();
                 _context = new LoaderContext();
                 _context.applicationDomain = new ApplicationDomain(ApplicationDomain.currentDomain);
                // _context.securityDomain = SecurityDomain.currentDomain;本地SWF文件取不到securityDomain属性值.这么写会报错。
                _loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loadCompleteHandler);
                _loader.load(new URLRequest("mc.swf"),_context);
            }
            
            private function loadCompleteHandler(e:Event):void
            {
                trace("complete");
                var dataClass:Class = _loader.contentLoaderInfo.applicationDomain.getDefinition("mc1") as Class ;
                var mc1:MovieClip = new dataClass() as MovieClip;
                mc1.y = 100;
                this.addChild(mc1);
                var dataClass:Class = _loader.contentLoaderInfo.applicationDomain.getDefinition("mc2") as Class ;
                var mc2:MovieClip = new dataClass() as MovieClip;
                mc2.x = 50;
                mc2.y = 100;
                this.addChild(mc2);                 
            }
    }
}

   loade当中可能会抛出的错误：

* LoaderContext.securityDomain值必须为null或者等于SecurityDomain.currentDomain。这以来 你只有把要加载的文件放在受信任安全沙箱中，或者放在你自己域(需要一个策略文件),才能加载到这些文件..
* 本地的SWF文件只能将LoaderContext.securityDomain设置为null,不充许在本地加载非本地件.
* 如果applicationDomain 或者 securityDomain 属性是一个不被信任的域。
* 本地SWF文件取不到securityDomain属性值.