An Instantiated object to array problem

Question

Hello! What is the problem? I get this error: NullReferenceException: Object reference not set to an instance of an object

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 [System.Serializable]
 public class inventorySlot
 {
     public int slotID;
  
 }
 
 public class inventoryDisplay : MonoBehaviour {
 
     public GameObject slotPrefab;
     public int slotsCount = 36;
     public inventorySlot[] slots;
 
 
     GameObject slotsBody;
 
 
     private void Awake()
     {
         slots = new inventorySlot[slotsCount];
         
     }
 
     private void Start()
     {
 
 
         slotsBody = GameObject.Find("SlotsBody");
 
         for(int i = 0; i < slotsCount; i++)
         {
             Instantiate
             slots[i].slotID = 1;
             
         }
     }
 
 }

Answer 1

Answer by Commoble · Mar 13, 2017 at 01:37 AM

After you instantiate an array of objects (any class type, not just UnityEngine.Objects), you also have to instantiate each object in the array.

The Instantiate() function (which you're not using the correct syntax for) is specifically for copying a GameObject from a prefab or an existing GameObject, and placing the copy into the scene. To instantiate an instance of a normal class (like your inventorySlot), you do this:

 private void Awake()
 {
     slots = new inventorySlot[slotCount];
 
     for (int i=0; i<slotsCount; i++)
     {
         slots[i] = new inventorySlot();
         slots[i].slotID = 1;
     }
 }

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Answer 2

Answer by IgorAherne · Mar 13, 2017 at 01:59 AM

inspect this

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An Instantiated object to array problem

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