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Question by putback · Aug 24, 2015 at 08:12 AM · 2d game

Please Help. How to add score on collision mobile?

Hello everyone. I am creating a 2d Mobile, touchscreen game for unity. I would like to have a UI score increase every time I touch the object. When I touch the specified object there is a collision but I want to enable a score for when these objects collide when I touch them. I will select the best answer.

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avatar image Andres-Fernandez · Aug 24, 2015 at 09:44 AM 0
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That's too vague. What is it that you are stuck with? The touch part? The UI part? If it's the UI part check the tutorials and live sessions here. If it's the touch part check the tutorial here.

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Answer by Ben-Stoneman · Aug 24, 2015 at 10:13 AM

@putback This will work as a basis for what you want:

     using UnityEngine;
     using System.Collections;
     using UnityEngine.UI; //Required when using UI elements in the script.
     
     public class ExampleScript : MonoBehaviour {
     
         public int currentScore;
         public Text displayScore;
     
         // Invoked on collision
         void OnCollisionEnter2D (Collision2D coll)
         {
             if (coll.gameObject.tag == "Player")
             {
                 //Add 20 points each time the player collides 
                 // with the object this script is attached to
                 currentScore += 20;
             }
         }
         
         // Update is called once per frame
         void Update ()
         {
             displayScore.text = currentScore.ToString();
         }
     }

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Answer by putback · Aug 27, 2015 at 07:56 AM

@Ben Stoneman . I need help, for some reason the score count is staying at 0 and I keep getting the error: Null Reference Exception: Object reference not set to an instance of an object.

on lithis line: displayScore.text = currentScore.ToString();

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avatar image Kimi073 · Nov 20, 2015 at 10:10 AM 0
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you haven't assigned the text that you want to display to the inspector yet

you should assign by drag and drop the name of the text you want to display in hierarchy into the empty slot that has the name "displayScore" in the Inspector

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