How do I fix this Null Reference error and update my score?

Question

Hello, I'm trying to get my score to update when my enemy is destroyed, but I keep getting a NullReferenceException: Object reference not set to an instance of an object error. I have the following HealthScript attached to my enemy:

 public void Damage(int damageCount)//Inflicts damage
     
 {
             hp -= damageCount;
     
             if (hp <= 0) {
                 ScoreScript score = GetComponent<ScoreScript> ();
                 score.UpdateScore (5);
                 Destroy (gameObject); //destroy enemy
                 }
                     }

Then, I have the following ScoreScript attached to my player:

 public void    UpdateScore(int scoreToAdd){
                 score += scoreToAdd;
                 }

The "score" is a public static int and seems to be recognized as such. What am I doing wrong?

Answer 1

Best Answer

Answer by 767_2 · Oct 13, 2014 at 12:26 PM

is store a static int in Scorescript if it is you can do it like that

  if (hp <= 0) {
             ScoreScript.score+=5;
             Destroy (gameObject); //destroy enemy
             }

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Danao · Oct 13, 2014 at 12:55 PM 1

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Thanks 767_2. I swear I tried that earlier and at first it didn't want to work. I ended up removing my scripts and re-adding them. Now it's working the way you suggested, so the correct answer award goes to you :)

767_2 · Oct 13, 2014 at 01:01 PM 1

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maybe your error is in Destroy(gameObject);

Answer 2

Answer by Quaker_SDR · Oct 13, 2014 at 12:06 PM

May be the damage fn calls after its destoryed.

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Danao · Oct 13, 2014 at 12:55 PM 0

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Thanks Quaker_SDR, but the damage function is being called after destroy.

How do I fix this Null Reference error and update my score?

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