Game not behaving as I scripted.

Questions & Answers
1

Firstly, I wrote a code for a button:

function Update () {
    if(Input.touchCount < 1){
    GameObject.Find("Shape").GetComponent(ChangeSprite).enabled = true;
    }
    else {
    GameObject.Find("Shape").GetComponent(ChangeSprite).enabled = false;
    }
    }

so when you touch it it would activate the other script:

var diamond : Sprite;
     var circle : Sprite;
     var triangle : Sprite;
     var square : Sprite;
     private var number : int;
     private var spriteRenderer : SpriteRenderer;
    
    function Start () {
    
    number = Random.Range(1,4);
    
    if(number == 1) {
    spriteRenderer.sprite = diamond;
    }
    
    else if(number == 2) {
    spriteRenderer.sprite = circle;
    }
    
    else if (number == 3) {
    spriteRenderer.sprite = triangle;
    }
    
    else {
    spriteRenderer.sprite = square;
    }
    
    }

This script is on an empty object. What the code does is it changes the sprite image of the game object. But it doesn’t recognise my touch. and i get an error saying : “NullReferenceException: Object reference not set to an instance of an object
ChangeSprite.Start () (at Assets/Scripts/GAME/ChangeSprite.js:23)” every time i hit the play button. Is there anything wrong with my code? I’m new to unity. Please help me. Thanks in advance.

3

You probably need to set the spriteRenderer variable to the SpriteRenderer component of the object.

2

i’m not sure about your code but did you remember to drag all the sprite images to there matching variable in the inspector?