Question by Frozenmidgets · Mar 10, 2016 at 01:08 AM · scripting problem script error singleton datatype

Singleton Problem

I'm new to coding in unity and wanted to transfer data from one script to another. I followed the tutorial i learned this from step by step(to the best of my knowledge) and I don't get any compiler errors but when I try to transfer the data i get this error:

NullReferenceException: Object reference not set to an instance of an object Button.jar () (at Assets/Scripts/Button.cs:8) UnityEngine.Events.InvokableCall.Invoke (System.Object[] args) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:144) UnityEngine.Events.InvokableCallList.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:621) UnityEngine.Events.UnityEventBase.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:756) UnityEngine.Events.UnityEvent.Invoke () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent_0.cs:53) UnityEngine.UI.Button.Press () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:35) UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:44) UnityEngine.EventSystems.ExecuteEvents.Execute (IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:52) UnityEngine.EventSystems.ExecuteEvents.Execute[IPointerClickHandler] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:269) UnityEngine.EventSystems.EventSystem:Update()

Here are my Scripts

This i the script i want the data to be stored on:

 using UnityEngine;
 using System.Collections;
 
 public class BodySpawner : MonoBehaviour {
     public static BodySpawner control;
 
     public int money;
     public int rate;
 }

This is the script I want to modify the data:

 using UnityEngine;
 using System.Collections;
 
 public class Button : MonoBehaviour {
     
     public void jar ()
     {
         Debug.Log(BodySpawner.control.money);
     }
 }

Add comment · Show 4

saud_ahmed020 · Mar 10, 2016 at 06:33 AM 1

@Frozenmidgets

  using UnityEngine;
   using System.Collections;
   
   public class BodySpawner : MonoBehaviour {
       private static BodySpawner control;
   
       public int money;
       public int rate;
  
       void Start()
      {
          money = 0;
          rate = 0;
      }
      public static BodySpawner SharedInstance()
     {
         return control;
     }
   }
  
   using UnityEngine;
   using System.Collections;
   
   public class MyButton : MonoBehaviour {
       
       public void jar ()
       {
           Debug.Log(BodySpawner.SharedInstance().money);
       }
   }

Frozenmidgets · Mar 10, 2016 at 03:11 PM 0

@saud_ahmed020 im sorry but that didnt work, i got the same error.

saud_ahmed020 Frozenmidgets · Mar 11, 2016 at 05:42 AM 0

@Frozenmidgets You are not allowed to make a class with defined keywords unless you have different namespace. So, just change the name of class "Button" to something other like "MyButtons".

Frozenmidgets · Mar 11, 2016 at 01:31 PM 0

@saud_ahmed020 Oh ok makes sense. Thank you! :)