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Question by Avash · Nov 21, 2016 at 07:24 PM · gameobjecteventevents

Deactivating object makes events null. What is the best workaround?

 public delegate void HandworkAction();
     public event HandworkAction grab;

After deactivating the object that contains the script, and reactivating it again, events become null, causing nullreference exception. Is this by any change a bug, why does this happen and what do you recommend me to do?

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Answer by Roktom · Nov 21, 2016 at 07:40 PM

I am not an event guru , but that's how I would do it :

  1. Subscribe to event during OnEnable().

  2. Unsubscribe from event during OnDisable().

  3. before invoking event check if it has subscribers.

Or use UnityEvent rather than a normal event, which should be easier and much more bug free. Also I would define events as public static in a class made specifically for it.

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