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Question by Biggerplay · Jun 09, 2015 at 02:51 PM · gameobject

Best way to know if an gameobject is destroyed

I'm creating a GO and adding it to a list, and then setting the GO to destroy after 10 seconds.

Thing is how do I know when the object has been destroyed so I can remove it from the list?

I don't particularly want to put a script on the GO just to test for when it's destroyed, but if that's the best way then I'll do that.

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avatar image The_Guy · Jun 09, 2015 at 03:01 PM 1
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If you're able to destroy the gameObject after 10 sec then don't you know that it has been destroyed? I don't think you should need to check for it. just call list.Remove(gameObject) then do Destroy(gameObject).

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Answer by Baste · Jun 09, 2015 at 03:02 PM

 if(go == null)
     //go is destroyed

Unity does some magic behind the scenes, so an object that is destroyed will immediately return true on a null-check. It's not actually quite null yet (Object.ReferenceEquals(go, null) will still be false, as the go is still in memory), but you usually don't have to worry about that. Just check for null and you're good to go.

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Answer by The_Guy · Jun 09, 2015 at 03:18 PM

I think the only not complicated way to do it would to just be use OnDestroy() on a script on the gameObject.

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Answer by Daeru · Jun 09, 2015 at 05:30 PM

You can not remove a destroyed GO from the list.. it is destroyed. Because it wasn't removed from the list beforehand, other scripts accessing this list will cause problems. You should remove the GO from the list first and then destroy it with:

 list.remove(GO);
 destroy(GO);
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Answer by vfxjex · Aug 09, 2021 at 07:18 PM

 if(!go) print("go is destroyed or null");
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