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Question by RagnaEdge · Oct 01, 2017 at 10:42 PM · triggersdestroy objectontriggerexit

Destroy object with OnTriggerExit

i'm new at scripting, trying to learn it myself, so i have a code that spawn selected prefab inside a trigger

 public GameObject [] itemPrefabs;
 
     void OnTriggerEnter(Collider other)
     {
         if (other.tag == "Player") 
         { 
             GameObject temp = Instantiate (itemPrefabs [Random.Range (0, itemPrefabs.Length)], transform.position, Quaternion.identity);
         }
     }

and i need to destroy spawned prefab when "player" exit the trigger without destroying spawner itself

 void OnTriggerExit(Collider other)
     {
         if (other.tag == "Player") 
         {
             Destroy ();
         }
     }

what do i need to write in Destroy function, or maybe use something else?

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Answer by MacDx · Oct 01, 2017 at 11:17 PM

What you need to do is save a reference to the spawned game object so you can destroy it later inside your on trigger exit. I would do something like this.

First define a field like:

 private GameObject spawnedPrefab;

then inside your OnTriggerEnterMethod replace the GameObject temp part with this new field, like this:

 spawnedPrefab = Instantiate(itemPrefabs [Random.Range(0,itemPrefabs.Length)],transform.position,Quaternion.identity);

Finally, use the field as a parameter for the destroy method inside your OnTriggerExit, like this:

 Destroy(spawnedPrefab);

If you want to have multiple prefabs spawned you will need to use a list of GameObjects instead, so you can save all the GameObject references you want and then iterate through the list to destroy each of them.

Hope this helps!

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avatar image RagnaEdge · Oct 02, 2017 at 01:51 AM 0
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thanx, this do what i needed!)

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