Preloader. So Frustrating...

Question

I am using flash develop and as3.
But for the last couple of weeks I have been banging my head against a brick wall trying to get a preloader to work
This is my preloader code
package
          import flash.display.Bitmap;
          import flash.display.DisplayObject;
          import flash.display.MovieClip;
          import flash.display.StageAlign;
          import flash.display.StageScaleMode;
          import flash.events.Event;
          import flash.events.IOErrorEvent;
          import flash.events.ProgressEvent;
          import flash.utils.getDefinitionByName;
           * @author Progress Studios
          public class Preloader extends MovieClip
                    [Embed(source = "Pictures/Preloader.png")]private const PreloaderImage:Class;
                    private const PImage:Bitmap = new PreloaderImage();
                    public function Preloader()
                              if (stage) {
                                        stage.scaleMode = StageScaleMode.NO_SCALE;
                                        stage.align = StageAlign.TOP_LEFT;
                              addEventListener(Event.ENTER_FRAME, checkFrame);
                              loaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
                              loaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioError);
                              // TODO show loader
                              stage.addChild(PImage);
                    private function ioError(e:IOErrorEvent):void
                              trace(e.text);
                    private function progress(e:ProgressEvent):void
                              // TODO update loader
                    private function checkFrame(e:Event):void
                              if (currentFrame == totalFrames)
                                        stop();
                                        loadingFinished();
                    private function loadingFinished():void
                              removeEventListener(Event.ENTER_FRAME, checkFrame);
                              loaderInfo.removeEventListener(ProgressEvent.PROGRESS, progress);
                              loaderInfo.removeEventListener(IOErrorEvent.IO_ERROR, ioError);
                              // TODO hide loader
                              startup();
                    private function startup():void
                              var mainClass:Class = getDefinitionByName("Main") as Class;
                              addChild(new mainClass() as DisplayObject);
I am using this line in my document class
[Frame(factoryClass="Preloader")]
I am using a swc to get all my graphics
What am I doing wrong why wont I get a picture for my preloader

Answer 1

Problem lies in your constructor:
if (stage) {
                                        stage.scaleMode = StageScaleMode.NO_SCALE;
                                        stage.align = StageAlign.TOP_LEFT;
                              addEventListener(Event.ENTER_FRAME, checkFrame);
                              loaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
                              loaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioError);
                              // TODO show loader
                              stage.addChild(PImage);
you want to use sth. like this to prevent unexpected beahavioor in all your class instances that have to access the displyaylist:
if(stage){
init();
else{
addEventListener(Event.ADDED_TO_STAGE,init);
public function int(e:Event = null):void{
//put all the code that accesses stage here