Check if eventListener exist?

Forum|Forum|15 years ago
June 16, 2011
7 replies
6091 views

How do I check if an eventListener exist? If it exist, I want to remove it with removeEventListener.

addEventListener(MouseEvent.MOUSE_DOWN, btn_Click3)

addEventListener(MouseEvent.MOUSE_DOWN, btn_Click2)

addEventListener(MouseEvent.MOUSE_DOWN, btn_Click)

ActionScript

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Correct answer kglad

use the code i showed,

hasEventListener()

in any frame where the object exists.

kglad

Community Expert

use the hasEventListener() method:

if(btn_3.hasEventListener(MouseEvent.MOUSE_DOWN){

btn_3.removeEventListener(MouseEvent.MOUSE_DOWN,btn_Click3);

}

Z

ZainuuAuthor

Inspiring

Hi, what if btn_3 is in another frame, how do I check it?

otherwise I will get error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.

kglad

Community Expert

if an object doesn't exist, you can't reference it with actionscript. if it exists elsewhere (like frame 3), you can reference it elsewhere (like frame 3).

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