在 Unity 中销毁克隆

Question

Hi everyone Im a bit stuck here. I have my gameObject Enemy Spawn at a random time. But the thing is that I only want the Enemy to be in the game for say 5 seconds. The trouble is that I can't destroy the object at all. Here I wrote this code to try and destroy the Enemy Object:

public class SpawnManager : MonoBehaviour {

public GameObject Enemy;
public float mytimer;
public float enemyHealth = 5.0f;

void Start()
{
    GameObject player = GameObject.Find("Player");
}

void spawnEnemy() {
    Transform enemy;
    GameObject enemySpawnPoint = GameObject.Find("EnemySpawn");
    enemy =  Instantiate(Enemy,enemySpawnPoint.transform.position,enemySpawnPoint.transform.rotation) as Transform; 
}

void OnTriggerEnter(Collider other)
{
    if (other.gameObject.name == "EnemyTrigger") {
        mytimer = Random.Range(0,10);
        //Debug.Log("Now Destroying");
        Invoke("spawnEnemy", mytimer);
        Debug.Log("Spawn Normal");

        if(Enemy.name == "BloodyMary(Clone"){
            Destroy(Enemy, enemyHealth);
            Debug.Log("Now Destroying");
        }
        }
    }

    }

Everytime I run into the trigger it spawns a "BloodyMary(Clone)" which I am trying to destroy. Any advice?

Answer 1

In my eyes it would make more sense for the enemy to handle its own destruction. This would mean that an enemy is responsible for its own duration which I feel would make more sense if you're having possibly a ton of enemies on the scene at any time.

I would create a co-routine which would simply wait for 5 seconds and then call the Destroy(gameObject) function to destroy itself. It may look a little like this:

IEnumerator DeathTimer(float duration)
{
    yeild return new WaitForSeconds(duration);
    Destroy(gameObject);
}

Then inside your 'Start()' method I would then call the co-routine (not done as a normal method). This would be done using something like this:

void Start()
{
    // calls the coroutine to start
    StartCoroutine("DeathTimer", duration);
}

Note: By calling a co-routine using a string (like above) you can then call "StopCoroutine("MethodName");" which will stop the coroutine at any time. This would be better than passing in a method parameter into the StartCoroutine().

This means your spawner is now purely responsible for spawning the enemies and they are responsible for their own death if they last for too long. Then you're not trying to manage multiple enemies on the spawner and you don't need to worry about tracking them in there.

I had a friend ask a very similar question the other day and he used this and it worked a treat.

Answer 2

The code that says:

Invoke ("spawnEnemy", myTimer);

Is calling your spawnEnemy() function, which creates anther Enemy clone. It also does the call with a delay timer.

If you don't want another Enemy just remove that part of the code .

---

Also you are destroying with a timer. You can Destroy instantaneously with Destroy(Enemy) .

Answer 3

I see a typo, as you missed a closing parethesis on the name check. the reason that the linter didnt pick this up was because the parenthesis is in the string, so to the program it seems perfectly reasonable to check for "bloodymary(clone" instead of "bloodymary(clone)".

Answer 4

Solution is straight forward.

use Destroy(gameobject,5); after u initiate that gameobject.

example

<-- line initiate gameobject -->
Destroy(gameobject,5);

which 5 is target second before gameobject will destroy.