How to change textfields on stage from an external class in as3

Question

I tried to change the textfield on the stage from an external class but it doesn't work. Thats the code how I tried it:

package  
{
    import flash.display.*;
    import flash.text.TextField;

    public class Exp extends Sprite
    {
        public function Exp() 
        {
            trace(stage.getChildByName("abc"));
            TextField(stage.getChildByName("abc")).text = "abc";

        }

    }

}

On my stage I got a textfield wich is dynamically with the instancename: "abc". But everytime I start the program flash tells me stage.getChildByName("abc") would be a null-object.

I hope someone can help me.

Answer 1

I've never used getChildyName before.. You can just use this:

var rt:MovieClip = MovieClip(root);
trace(rt["abc"]);

Or shorter:

trace(MovieClip(root)["abc"]);

If your example is your document class -

package
{
    import flash.display.MovieClip;
    import flash.text.TextField;

    public class Exp extends MovieClip
    {

        public function Exp()
        {
            var r:MovieClip = MovieClip(root);

            TextField(r["abc"]).text = "abc";
        }
    }   
}