CODEWITHSUNDEEP
c#unity-game-engine
user2698308
user2698308

Reputation: 145

unity C# run method from another class

I want to run metod in the class from another class and both of them atached to different obj

Two classes. the first is:

public class NewScore: MonoBehaviour {
public void updateScoreBy( int intr) {
    Debug.Log("intr+4"+intr+4);
}
}

and the second is:

public class NewPlus: MonoBehaviour {
    public NewScore newscore;
public void OnTriggerEnter2D(Collider2D obj) {
    newscore.updateScoreBy(+1);
}
}

When I run my code I recive an arror "NullReferenceException: Object reference not set to an instance of an object" and it points on newscore.updateScoreBy(+1); How can I fix it?

Upvotes: 0

Views: 1869

Answers (3)

dogiordano
dogiordano

Reputation: 714

You didn't initialize newscore.

Change your NewPlus class like this so it will initialize newscore on construction.

public class NewPlus: MonoBehaviour {
  public NewScore newscore;
  public NewPlus(){
    newscore=NewScore();
  }
  public void OnTriggerEnter2D(Collider2D obj) {
    newscore.updateScoreBy(+1);
  }
}

Upvotes: 0

Fabricio
Fabricio

Reputation: 7925

You need to initialize public NewScore newscore;: drag drop the object that contains that script on that variable in the Inspector panel

Upvotes: 1

Tom
Tom

Reputation: 627

depending on what you want to do you could make the function static like:

public static void updateScoreBy(int intr)
{
    Debug.Log("intr+4"+intr+4);
}

and call it with:

NewScore.updateScoreBy(1);

Upvotes: 0

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