CODEWITHSUNDEEP
flashactionscript
user310291
user310291

Reputation: 38190

Access of undefined properties in flash

I'm following tutorial here

http://www.graphicsxone.com/checkbox-and-as3-in-flash-cs4.html

This is my code in main.as 

package {

        import flash.display.Sprite;
        // import the CheckBox class
        import fl.controls.CheckBox;    
        mport flash.events.*;

    public class main extends Sprite {      

        addEventListener( Event.ADDED_TO_STAGE, init ); 

        // create the CheckBoxes
        var NS = new CheckBox();
        var SS = new CheckBox();
        var ES = new CheckBox();
        var WS = new CheckBox();

    }

  private function init( e:Event ):void
  {
    removeEventListener( Event.ADDED_TO_STAGE, init );
    response_txt.text = 'foo bar baz etc';
  } 

}

When I test it says

Access of undefined properties response_txt.

New picture http://img217.imageshack.us/i/responsetxt2.jpg/

enter image description here

Upvotes: 0

Views: 2734

Answers (3)

zzzzBov
zzzzBov

Reputation: 179086

It's a simple issue, response_txt exists on the stage, but the stage hasn't been instantiated when the code is called.

The simple solution is to add an event handler in the class constructor:

import flash.events.Event;

public class main extends Sprite
{
  public function main():void
  {
    addEventListener( Event.ADDED_TO_STAGE, init );
  }

  private function init( e:Event ):void
  {
    removeEventListener( Event.ADDED_TO_STAGE, init );
    response_txt.text = 'foo bar baz etc';
  }
}

Upvotes: 1

Alina
Alina

Reputation: 11

You don't have an instance of response_txt.

From tutorial:

Take the Text Tool and draw a rectangle to cover the inside of the container.

Set the Text property in the Properties to “Dynamic text” with a instance name of response_txt.

Did you do that?

Upvotes: 1

Bosworth99
Bosworth99

Reputation: 4234

You never instantiated response_txt.

var response_txt:TextField = new TextField();
response_txt.text = "blah blah blah";

That or you aren't assigning the instance name properly in the flash IDE. I didn't look at the tutorial much but - if your symbol is on the stage, just click on it and be sure to give it the right instance name...

Upvotes: 1

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