iOS won't allow any code in your loaded swf to execute.
so, one solution is to execute the stop from the loading (main) swf:
var loader:Loader=new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeF);
loader.load(new URLRequest("yourexternalswf.swf"));
function completeF(e:Event):void{
MovieClip(loader.content).addEventListener(Event.ENTER_FRAME,enterfram eF);
}
function enterframeF(e:Event):void{
if(MovieClip(loader.content).currentFrame==MovieClip(loader.content).t otalFrames){
MovieClip(loader.content).removeEventListener(Event.ENTER_FRAME,enterf rameF);
MovieClip(loader.content).stop();
}
}
