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Question by UDN_2f0abe75-257a-49c7-aaed-cdb8b48980dc · Dec 22, 2016 at 06:43 PM · c#ui

UI element bug?

Hi, I assign the text element in the inspector as shown. alt text

However, when I run the game, the inspector looks like this. alt text

I get a "NullReferenceExecption: Object Reference not set to an instance of an object". Below is the code I am using.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class ScoreKeeper : MonoBehaviour {
 
     public Text scoreText;
     public static int score;
 
     // Use this for initialization
     void Start () {
         scoreText = gameObject.GetComponent<Text> ();
         score = 0;
     }
     
     // Update is called once per frame
     void Update () {
         scoreText.text = "Score: " + score.ToString();
     }
 }
 

1.png (8.4 kB)
2.png (32.9 kB)
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Answer by TBruce · Dec 22, 2016 at 07:07 PM

This is no bug. The reason you are getting an error is that you are first assigning the UI.Text element in the inspector but then you nullifying it in the Start() function with this

 scoreText = gameObject.GetComponent<Text> ();

you can either remove the statement above or do this instead

 if (scoreText == null)
 {
     scoreText = gameObject.GetComponent<Text> ();
 }

Note: The assignment requires that a UI.Text component be attached to the current game object (the same game object that ScoreKeeper is attached to).

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