Help with Null Refrence

Unity Engine
1

Hello, I put in my project to Xcode but, of course I have some how 278 errors when it builds onto my phone.
I need some help on this one and only problem I have on my scripting. It says
NullReferenceException: Object reference not set to an instance of an object
ShopItems.Update () (at Assets/Scripts/ShopItems.cs:29)

Using C#

I have the script right here. If you can help with the problem it would be great.

usingUnityEngine;
usingSystem.Collections;
usingUnityEngine.UI;
publicclassShopItems : MonoBehaviour {
publicTextItemNameText;
//publicTextItemCostText;
publicTextItemNOPurchasesText;
publicstringItemName;
publicintNOP;
publicintItemCost;
publicintDimondsCost;
publicintGoldCost;
publicintIronCost;
publicintMoneyAvalible;
publicintLevels;
publicintScoreTypeAuto;
publicintScoreTypeClick;
publicintAddLevelCost;
voidStart () {
ItemNameText.text = "" + ItemName;
//ItemNOPurchasesText.text = "" + NOP;
//MoneyAvalible = PlayerPrefs.GetInt ("DepthLevel");
}


voidUpdate () {

MoneyAvalible = PlayerPrefs.GetInt ("Depth Level");
ItemNOPurchasesText.text = "" + NOP;






}

publicvoidItemBuyClicked(){

if (ItemCost <= MoneyAvalible) {
MoneyAvalible -= ItemCost;
Levels = MoneyAvalible;
PlayerPrefs.SetInt ("Depth Level", + Levels);
NOP += 1;
ItemCost *= AddLevelCost;

} else {
Debug.Log("DidntHaveEnough");

}


}
}
2

First of all next time try do format your code a litle bit :confused:
Second can you tell us in which line of code this null ref is, your error says Line 29 but i don’t think it matches with the code you posted.

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class ShopItems : MonoBehaviour {
     public Text ItemNameText;
     //public Text ItemCostText;
     public Text ItemNOPurchasesText;
     public string ItemName;
     public int NOP;
     public int ItemCost;
     public int DimondsCost;
     public int GoldCost;
     public int IronCost;
     public int MoneyAvalible;
     public int Levels;
     public int ScoreTypeAuto;
     public int ScoreTypeClick;
     public int AddLevelCost;

     void Start () {
          ItemNameText.text = "" + ItemName;
          //ItemNOPurchasesText.text = "" + NOP;
          //MoneyAvalible = PlayerPrefs.GetInt ("DepthLevel");
     }

     void Update () {
          MoneyAvalible = PlayerPrefs.GetInt ("Depth Level");
          ItemNOPurchasesText.text = "" + NOP;
     }

     public void ItemBuyClicked () {
          if (ItemCost <= MoneyAvalible) {
               MoneyAvalible -= ItemCost;
               Levels = MoneyAvalible;
               PlayerPrefs.SetInt ("Depth Level", + Levels);
               NOP += 1;
               ItemCost *= AddLevelCost;
          } else {
               Debug.Log("DidntHaveEnough");
          }
     }
}
3

Ok, I thought I do pretty clean code. But line 29 seems to be the problem. I get Depth Level and ItemName.
I don’t have anything thats not used. All 95 Items have Name. I think NOP (Number of purchases) is the problem. I changed the int to make it equal 0. It doesn’t show the error any more. Thanks for the help though.