{AS3} addChild() in a Class does not work

Question

so I have a class:

package
{
    public final class Main extends Sprite
    {
        private var TextHolder:Sprite = new Sprite();

        public function Main():void
        {
            spawnHolder();
        }
        private function spawnHolder():void
        {
            TextHolder.graphics.beginFill(0xFFFFFF);
            TextHolder.graphics.drawRect(0, 0, 100, 80);
            TextHolder.graphics.endFill();
            stage.addChild(TextHolder);
        }
    }
}

but the problem is.. I do not see anything on the stage.. This Main Class is the document class btw.

I'd appreciate it very much if anyone could help me out! Thanks in advance.

~Gg

Just because it says `[object Sprite]` doesn't mean that it's on the display list. It just means that it's an object of the type `Sprite`. — Simon Forsberg, Nov 07 '12 at 02:09
Ran your code in FlashDevelop with a black background and it works fine. It could be something in your environment. I suggest debugging and checking if it actually gets added to the stage and checking the colors. — Barış Uşaklı, Nov 07 '12 at 02:58

score 1 · Accepted Answer · answered Nov 07 '12 at 14:02

1

Stage is not available until the display object has been added to the stage. It will be null until that happens.

package
{
    public final class Main extends Sprite
    {
        private var TextHolder:Sprite = new Sprite();

        public function Main():void
        {
            this.addEventListener(Event.ADDED_TO_STAGE,spawnHolder);
        }
        private function spawnHolder():void
        {
            TextHolder.graphics.beginFill(0xFFFFFF);
            TextHolder.graphics.drawRect(0, 0, 100, 80);
            TextHolder.graphics.endFill();
            stage.addChild(TextHolder);
        }
    }
}

answered Nov 07 '12 at 14:02

The_asMan

6,364
4
23
34

Better if you test for `if(stage)` before adding the event listener, and call `spawnHolder` directly if it evaluates to true: `if(stage) spawnHolder() else this.addEventListener(Event.ADDED_TO_STAGE,spawnHolder);` – Jude Fisher Nov 07 '12 at 14:21
@JcFx you also left out that the event listener isn't being removed :) – The_asMan Nov 07 '12 at 15:09
Heh. Pedants anonymous will throw me out of their inner circle ... :) – Jude Fisher Nov 07 '12 at 15:20
Heh the "if(stage) init;....." was what I tried right b4 seeing this post! Thanks anyways guys! :D – GilaGuy Nov 10 '12 at 02:37

score 0 · Answer 2 · answered Nov 07 '12 at 02:43

0

Try to change a color, probably your document background is also white. Do not name vars with capital like TextHolder, use textHolder instead. Try to do all work after stage initialized.

answered Nov 07 '12 at 02:43

Sergey Dmitriev

454
3
13

{AS3} addChild() in a Class does not work

2 Answers2