Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 13 Next capture
2021 2022 2023
1 capture
13 Jun 22 - 13 Jun 22
sparklines
Close Help
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by Angry Armadillo · Jun 10, 2013 at 05:02 PM · listobject reference

Object reference not set to an instance of an object

Hi there! I'm trying to make a simple script, that will add a gameobject to my list, when the player collides with it and presses the use key. However I keep getting the "Object reference not set to an instance of an object" error. It points to the second script, line 22. Any help?

First script PlayerInventory.cs

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class PlayerInventory : MonoBehaviour {
     
     public List<GameObject> myInventory;
     
     void Start()
     {                
         myInventory = new List<GameObject>();
     }
         
     public void AddToInventory(GameObject newItem)
     {
         myInventory.Add (newItem);
         Debug.Log ("Added");
     }
     
 }


Second script GameObjectToInventory.cs

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class GameObjectToInventory : MonoBehaviour {    
         
     private PlayerInventory playerInventory;    


     void OnTriggerStay(Collider otherObject) 
     {    
         
         if(Input.GetButtonDown("Use")){            
                 PlayerInventory playerInventory = GetComponent<PlayerInventory>();            
                 playerInventory.AddToInventory(this.gameObject);
                 Destroy (this.gameObject);
                 }
     }    
 }
Comment
Add comment · Show 3
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image KiraSensei · Jun 10, 2013 at 05:23 PM 0
Share

You don't have any line 22 on any of these two scripts.

avatar image KiraSensei · Jun 10, 2013 at 06:04 PM 0
Share

Do you really have the script PlayerInventory attached to the game object containing the second script ?

avatar image moghes · Jun 12, 2013 at 08:53 AM 0
Share

@Angry Armadillo try commenting the Destroy (this.gameObject) and see what happens

1 Reply

· Add your reply
  • Sort: 
avatar image
0

Answer by Spikeh · Jun 10, 2013 at 05:37 PM

There's no line 22 anywhere, but I can tell you that your second script has a syntax error. You have tried to instantiate playerInventory twice. Only one line needs changing:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
  
 public class GameObjectToInventory : MonoBehaviour {    
  
     private PlayerInventory playerInventory;   
  
  
     void OnTriggerStay(Collider otherObject) 
     {  
  
        if(Input.GetButtonDown("Use")){      
           playerInventory = GetComponent<PlayerInventory>();
           playerInventory.AddToInventory(this.gameObject);
           Destroy (this.gameObject);
       }
     }  
 }
Comment
Add comment · Show 2 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image Angry Armadillo · Jun 10, 2013 at 05:55 PM 0
Share

Ah, silly me, I formatted the code so the actual line for the error is 15. But after fixing the syntax error unity still throws me the Object reference error.

avatar image Spikeh · Jun 12, 2013 at 06:39 AM 0
Share

I'm very new to Unity scripting, though I'm a c# vet - so I'm not entirely sure what everything does yet! $$anonymous$$aybe you need to use otherObject ins$$anonymous$$d of this.gameObject? Depends what the script is applied to I suppose?

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Follow this Question

Answers Answers and Comments

17 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

A node in a childnode? 1 Answer

Problem with passing object to another script. 1 Answer

How to add to a list excluding certain items 1 Answer

Switching Target during Target Lock 1 Answer

Best way to add item to other script list? 0 Answers


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges