Cant Link Ammunition And Text

Does anyone know how to fix my issue? I have text that will not update with my ammo. It gives me this error in the console: "NullReferenceExeption: Object reference not set to an instance of an object" (I took out the important parts in the script down below.)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections.Generic;
3. using System.Collections;
4. using UnityEngine.UI;
5.  
6. public class GunScript : MonoBehaviour
7. {
8.     public int maxAmmo = 100;
9.     private int currentAmmo;
10.  
11.  
12.     Text ammoTxt;
13.  
14.     void Awake()
15.     {
16.         ammoTxt = GetComponent<Text>();
17.     }
18.  
19.     void Start()
20.     {
21.         maxAmmo = 100;
22.         currentAmmo = maxAmmo;
23.     }
24.  
25.     void Update()
26.     {
27.         ammoTxt.text = gameObject.GetComponent<GunScript>().currentAmmo.ToString();
28.     }
29.  
30.     public void Shoot()
31.     {
32.         currentAmmo--;
33.     }
34. }
35.  
36.  

 

It would be helpful if you mentioned which line the error occurs, but it is a good idea to check if GetComponent or similar methods are returning null before trying to use their returned reference. Especially when debugging this kind of issue.

Do stuff like this:

Code (csharp):

1.     void Awake()
2.     {
3.         ammoTxt = GetComponent<Text>();
4.         if (ammoTxt == null)
5.         {
6.             Debug.Log("ammoTxt is null in Awake() GunScript.cs");
7.         }
8.     }

Also, what are you doing in Update? It makes no sense. You're effectively using GetComponent to get a reference to itself just to access a private variable.

This:

Code (csharp):

1.     void Update()
2.     {
3.         ammoTxt.text = gameObject.GetComponent<GunScript>().currentAmmo.ToString();
4.     }

and this:

Code (csharp):

1.     void Update()
2.     {
3.         ammoTxt.text = currentAmmo.ToString();
4.     }

do the same thing.