Problem with int values + 1 gives unexpected values

Questions & Answers
1

Hi everyone,
I’m about to launch my game but I’m facing this crazy weird bug that I failed to see the cause of it
so I have diamonds in my game simply everytime the player takes the diamond the number of diamonds he has increases by 1. but for some reason randomly increases by 2 or 3 !
Here is my code: (using unity 2017)

public class Diamond : MonoBehaviour {
	private LevelManager theLevelManager;
	public GameObject DiamondUI;

	// Use this for initialization
	void Start () {
		theLevelManager = FindObjectOfType<LevelManager>();
		DiamondUI.SetActive (false);
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void OnTriggerEnter2D (Collider2D other)
	{
		if (other.tag == "Player") {
			theLevelManager.AddDiamond ();
                        DiamondUI.SetActive (true);
			gameObject.SetActive (false);
			

		}
	}
}

and this is the part of the code in the level manager script:

public void AddDiamond ()
	{
		diamondCount += 1;
		DiamonText.text = "" + diamondCount;

	}

ofcourse at the start of the game I put diamondCount = 0;

2

found the answer, incase anyone had this problem. the sulition is to add a bool so the trigger wont be called many times than desired.

void OnTriggerEnter2D (Collider2D other)
{
    if (other.tag == "Player" && !isCollected) {
        isCollected = true;
        theLevelManager.AddDiamond ();
                    DiamondUI.SetActive (true);
        gameObject.SetActive (false);


    }
}