如何防止在Unity中销毁对象的所有实例？

Question

I have a prefab object called Beam, which contains several things but one is an object that when an instance of it is collided with and triggered, should destroy itself.

Currently, I have the script that generates all of the instances on a variable called Beams. Shown here:

When that runs, it creates clones within it. Seen here:

You will also see in the last image, the Beam prefab that contains the Cookie in it. That cookie is where I have a script that says, if I hit it, destroy. That code looks like this:

...

public class Collectibles : MonoBehaviour
{
    GameManager game;

    // Start is called before the first frame update
    void Start()
    {
        game = FindObjectOfType<GameManager> ();
    }

    ...

    void OnTriggerEnter2D(Collider2D other) {
        if(other.tag == "Player"){
            string coinType = "Cookie";
            game.AddCollectible(coinType);
            Destroy(gameObject);
        }


    }
}

Currently, when I run into a cookie, it runs Destroy(gameObject) and destroys ALL instances of the cookie (one per each Clone).

This code lives on Cookie, not on Beams. Is that correct? Should I have the code somewhere else? I also tried Destroy(this) but that doesn't do what I thought it would do (just the instance).

Is it possible that from where I was calling Destroy, the script doesn't have access to the instances, or am I missing something? Thank you in advance!

Answer 1

If I understand your question, you want that when the "player" collides with an instance of "beam" only destroy the instance of Cookie (or the gameobject that contains the script), in this case it would do so with the tag:

public GameObject[] arrayofcookie;

public int destroyedinstances=1; 
//this int will tell how many instances you want to be destroyed (from the last instantiated to the first)

//for this example the last instance will be deleted


public void destroyCookie()
{
    arrayofcookie= GameObject.FindGameObjectsWithTag("Cookie");
    for (int i = 0; i < destroyedinstances; i++)
    {
        Destroy(arrayofcookie[i].gameObject);
    }
}

You call this method in the cookie script, in the collider or if you prefer with an invoke method after N seconds.

I do not think I have understood your question very well, but in these problems I prefer to use the label and it also depends on the nature of your game