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Question by UnPluks · Mar 18, 2016 at 08:59 AM · destroyeventondestroy

Track OnDestroy() Who called it?

Hello guys. I am working on a project and I have several functions capable of destroying an object. I would like to know if there is a way to print the name of the function which destroyed triggered the OnDestroy() function of my destroyed object.

Thanks a lot in advance.

Edit: Right now I am printing the name of the function on each function before I call GameObject.Destroy(obj)... However, I think there should be another method(?)

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Answer by Hellium · Mar 18, 2016 at 09:08 AM

I don't think Unity provides a way to detect who destroyed your object using only the OnDestroy message.

However, you can define a custom class which inherits from MonoBehaviour to have the possibility to track it :

 //C#
 public class MyMonoBehaviour : MonoBehaviour
 {
     public void DestroyGameObject( MonoBehaviour caller = null )
     {
         if( caller != null )
         {
             Debug.Log( gameObject.name + " has been destroyed by " + caller.gameObject.name ) ;
         }
         GameObject.Destroy( gameObject ) ;
     }
 }

To destroy the gameobject, use :

 // C#
 MyMonoBehaviour myMonoBehaviour = otherObject.GetComponent<MyMonoBehaviour>() ?? otherObject.gameObject.AddComponent<MyMonoBehaviour>() ;
 myMonoBehaviour.DestroyGameObject( this ) ;

It may not be the simpler way, but I think, it works ! ;)

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avatar image UnPluks · Mar 18, 2016 at 09:23 AM 0
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Well, hi! This works pretty smoothly :D Although I was expecting Unity to have it already in within the OnDestroy() call... Thanks a lot Hellium, really appreciate it! :D

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