loadFilePromise() method unavailable in the Loader class using FB 4.7 (target iOS)

I took this code directly from an Action Script 3 example on the Adobe website, but it didn't work.

Here was my new solution after 6 days of trial and error (mostly error)

public class TakePhoto extends Sprite
  {
       private var cameraUI:CameraUI = new CameraUI();
       private var cameraRoll:CameraRoll = new CameraRoll();
       private var dataSource:IDataInput;
       private var eventSource:IEventDispatcher;
       private var testTxt:TextField = new TextField();

       public function TakePhoto()
       {
            if( CameraUI.isSupported )
            {
                 testTxt.text = "CameraUI Initializing ...";

                 cameraUI.addEventListener( MediaEvent.COMPLETE, imageSelected );
                 cameraUI.addEventListener( Event.CANCEL, browseCanceled );
                 cameraUI.addEventListener( ErrorEvent.ERROR, mediaError );

                 cameraUI.launch( MediaType.IMAGE );
            }
            else
            {
                 testTxt.text = "CameraUI is not supported.";
            }
         }

         private function imageSelected(e:MediaEvent):void
            {
                 trace( "Media selected..." );
                 testTxt.text =  "Media selected...";

                 // Create a new imagePromise
                 var imagePromise:MediaPromise = e.data;

                 // Open our data source
                 dataSource = imagePromise.open();

                 if (imagePromise.isAsync )
                 {
                      trace("Asynchronous");
                      var eventSource:IEventDispatcher = dataSource as IEventDispatcher;
                      eventSource.addEventListener( Event.COMPLETE, onMediaLoaded );
                 }
                 else
                 {
                      trace("Synchronous");
                      readMediaData();
                 }
             }

            private function onMediaLoaded( event:Event ):void
            {
                 trace("Media load complete");
                 readMediaData();
            }

             private function readMediaData():void
             {
                 testTxt.text = "Read Media Data";
                 trace("Read Media Data");

                 var imageBytes:ByteArray = new ByteArray();
                 dataSource.readBytes(imageBytes);

                 var loader:Loader = new Loader();
                 loader.loadBytes(imageBytes);
                 loader.contentLoaderInfo.addEventListener(Event.COMPLETE, imageAddToCamRoll);
                 loader.contentLoaderInfo.addEventListener(ErrorEvent.ERROR, onMediaLoadError);

               }

            protected function imageAddToCamRoll(event:Event):void
            {
                 var loaderInfo:LoaderInfo = LoaderInfo(event.target);
                 var bmpData : BitmapData  = new BitmapData(loaderInfo.width, loaderInfo.height, false, 0xFFFFFF);
                 bmpData.draw(loaderInfo.loader);

                 try
                 {
                      cameraRoll.addBitmapData(bmpData);
                      trace( "image added to cameraRoll" );
                      testTxt.text = "Image added to cameraRoll";
                 }
                 catch (e:Error) {
                      trace( "Caught :: " + e );
                      testTxt.text = "Image failed to add to cameraRoll";
                 }
  }

This worked. Now I can take photos and store them in the Camera Roll.