Calling functions on applications loaded using SWFLoader

Following on from my last post on passing parameters to an application that is loaded using SWFLoader, this post will show you how to call a function on an application.
Here is the code to load swf:

var loader:SWFLoader = new SWFLoader(); loader.addEventListener(Event.INIT, swfLoaded); loader.load("AnotherSWF.swf");

And here is the code to handle adding the new swf content application:

private function swfLoaded(event:Event):void {   var content:DisplayObject = loader.content;   // Or if you don't have the loader:   // content = event.target.content;   // add loaded SWF to a UIComponent to show it on the screen   uicomponent.addChild(content);   var sysmgr:SystemManager = (content as SystemManager);   // must wait for the swf application to finish loading   // otherwise the application is null   sysmgr.addEventListener(FlexEvent.APPLICATION_COMPLETE, swfAppComplete);  }

And here is the code to call a function on the swf application:

private function swfAppComplete(event:FlexEvent):void {   var sysmgr:SystemManager = (event.currentTarget as SystemManager);   var swfApp:Application = (sysmgr.application as Application);   // call your function here, maybe add error checking   if (swfApp.hasOwnProperty("helloWorld")) {     var helloWorld:Function = (swfApp["helloWorld"] as Function);     helloWorld("hi");   } }

Note that the SWFLoader has 2 events that could be used:

Event.COMPLETE ("complete") - dispatched when the content loading is done

Event.INIT ("init") - dispatched when the properties and functions of the loaded SWF are accessible

If you want more reading on this subject, here is another good blog on Nested SWF communication.