Accessing a class from a loaded SWF

Question

In Flash Professional, I drew a shape, converted it to symbol, linked it to class Symbol1 (extends MovieClip) which is generated at run-time, and saved the SWF file as shape.swf.
Now my main application wants to load shape.swf and create multiple instances of Symbol1 but I get ReferenceError when trying to access the class Symbol1.
Below is my main application's code. Errors thrown are mentioned in comments.
public class MovieClipTest extends Sprite
    public function MovieClipTest()
        var url:String = 'shapes.swf';
        var l:Loader = new Loader();
        l.contentLoaderInfo.addEventListener(Event.COMPLETE, f);
        l.load(new URLRequest(url), new LoaderContext(false, ApplicationDomain.currentDomain));
    private function f(event:Event):void
        var content:Sprite = (event.currentTarget as LoaderInfo).content as Sprite;
        trace(getQualifiedClassName(content.getChildAt(0))); // output: Symbol1
        trace(ApplicationDomain.currentDomain.getDefinition('Symbol1')); // throws Error #1065: Variable Symbol1 is not defined.
        trace(getDefinitionByName('Symbol1')); // throws Error #1065: Variable Symbol1 is not defined.

Answer 1

Your "Symbol" is obviously not in the current ApplicationDomain, but in the loaded SWF's domain:
var symbolClass:Class = event.target.applicationDomain.getDefinition("Symbol") as Class;
var symbolInstance:MovieClip = new symbolClass() as MovieClip;
Also because you're loading a SWF, the content of the Loader is a MovieClip, not a Sprite.
Kenneth Kawamoto
http://www.materiaprima.co.uk/