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Question by Kazuva · Apr 06, 2016 at 09:10 AM · scripting problemnot workingreferencingreference-other-object

how do i refer to a instantiated gameobject?

i can't find what is wrong whith my code

 using UnityEngine;
 using System.Collections;
 
 public class pyssy : MonoBehaviour {
     public Transform naali;
     
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
     public void ammu (int mia) {
         
         
         Transform jousi = (Transform)Instantiate (naali, new Vector3(transform.position.x, transform.position.y , transform.position.z), transform.rotation);
         print(jousi);
         
         jousi.transform.GetComponent<nuoli>().nimea(mia);
         print(mia);
     }
 }

NullRefereranceException: Object referance not set up to an instance of an object at line 22

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Answer by Ckboyd89 · Apr 07, 2016 at 04:47 AM

It's usually a good idea to reference from and instantiate as GameObjects and then branch out to other components from there. Below are the changes that I would make:

 public class pyssy : MonoBehaviour
 {
      public GameObject naali;
      
      void Start ()
 ``{
           ammu(0); // Test purposes, comment out
      }
 
      public void ammu (int mia)
 ``{
          GameObject jousi = (GameObject)Instantiate (naali, new Vector3(transform.position.x, transform.position.y , transform.position.z), transform.rotation);
          print(jousi);
 
          // Using the transform to get a component is not necessary
          // jousi.transform.GetComponent<nuoli>().nimea(mia);
 
          jousi.GetComponent<nuoli>().nimea(mia);
          print(mia);
      }
  }



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avatar image Kazuva · Apr 13, 2016 at 01:17 PM 0
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that doesn't seem to make any difference "jousi.GetComponent().nimea(mia);" still doesn't work because: "NullRferanceexception: Object referance in not set to an instance of object"

avatar image Ckboyd89 Kazuva · Apr 13, 2016 at 11:47 PM 0
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$$anonymous$$ake sure that the prefab you are instantiating (naali) has a "nuoli" component attached to it.

avatar image Kazuva · Apr 14, 2016 at 06:02 AM 0
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it has nuoli component attached to it

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