毁灭克隆摧毁所有克隆

Question

当一个物体在特定的圆形区域内时，我想销毁它的一个实例。守则如下：

Collider2D[] overlap = Physics2D.OverlapCircleAll(
    ball.transform.position, 
    (ball.renderer.bounds.size.x)/2);
if (overlap.Length>=1)
{           
    foreach (Collider2D coll in overlap)
    {
        Debug.Log (coll.GetInstanceID());
        if (coll.name.Contains("alien"))
        {
            //problem here:
            Destroy (coll.gameObject);
        }
    }
}

Destroy(coll.gameObject)永久销毁所有克隆，新克隆没有实例化，我得到了错误MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object.

有办法摧毁那个和那个克隆人吗？我尝试了不同的名称和使用Destroy(GameObject.Find(coll.name))，但这也破坏了所有的克隆以及防止新的产卵。

有人帮忙吗？

更新：

实例化如下：

private bool bCanCreateParachuter = true; // bool to stop the spawning
GameObject go;


// Use this for initialization
void Start () {

    //handling screen orientation
    Screen.orientation = ScreenOrientation.LandscapeLeft;
    ///

    go = (GameObject)Instantiate(Resources.Load("alienPink")); 
    StartCoroutine("CreateParachuter");

}



IEnumerator CreateParachuter()
{
    while(bCanCreateParachuter)
    {

        Instantiate(go, new Vector3(Random.Range(-10,10), Random.Range(-5,5), 0), Quaternion.identity);
        //          Instantiate(go, new Vector3(Random.Range(-10,10), Random.Range(-10,10), 0), Quaternion.identity);
        go.name = "alienPink"+nextNameNumber;
        nextNameNumber++;
        yield return new WaitForSeconds(Random.Range(0f,1f));
        yield return null;
    }
    yield return null;
}

关键更新：

如果我取消注释if (grabbedObject !=null)，代码就能工作。

//  if (grabbedObject != null) {

//works if uncomment above for some reason

        Collider2D[] overlap = Physics2D.OverlapCircleAll (ball.transform.position, (ball.renderer.bounds.size.x)/2);
        if (overlap.Length>=1){

            foreach (Collider2D coll in overlap){
        Debug.Log (coll.GetInstanceID());
            if (coll.name.Contains("alien")){
                    Destroy (coll.gameObject);

            }
            }
        }else {
        //  Debug.Log (grabbedObject.renderer.bounds.size.x);
        }

这是grabbedObject的背景：

Rigidbody2D grabbedObject = null;
. . .
RaycastHit2D hit = Physics2D.Raycast(mousePos2D , dir);

        //if (hit!=null && hit.collider!=null){

        // check collisions with aliens





    //  OnCollisionEnter2D(grabbedObject.collisionDetectionMode);


        if ( hit.collider!=null){
            // we clicked on something lol... something that has a collider (box2d collider in this case)
            if (hit.collider.rigidbody2D!=null){
                //hit.collider.rigidbody2D.gravityScale = 1;
                grabbedObject = hit.collider.rigidbody2D;
            //  circleCollider = hit.collider.collider2D.   ;


                springJoint = grabbedObject.gameObject.AddComponent<SpringJoint2D>();
                // set the anchor to the spot on the object that we clicked
                Vector3 localHitPoint =  grabbedObject.transform.InverseTransformPoint(hit.point);
                springJoint.anchor  = localHitPoint;
//      



dragLine.enabled = true;
                }

            }

基本上，grabbedObject是你点击并拖到屏幕上的任何东西(任何GameObject)，我在这里遗漏了什么？

Answer 1

重新出现的问题是，您没有保存对资源项的引用，所以当您销毁第一个项目时，您创建的要实例化的“模板”就被销毁了。

这会解决这个问题

GameObject template;
void Start()
{
     //handling screen orientation
     Screen.orientation = ScreenOrientation.LandscapeLeft;
     template = (GameObject)Resources.Load("alienPink");
     StartCoroutine("CreateParachuter");
}

IEnumerator CreateParachuter()
{
     while(bCanCreateParachuter)
     {
        GameObject go = Instantiate(template, new Vector3(Random.Range(-10,10), Random.Range(-5,5), 0), Quaternion.identity);
        go.name = "alienPink"+nextNameNumber;
        nextNameNumber++;
        yield return new WaitForSeconds(Random.Range(0f,1f));
        yield return null;
    }
    yield return null;
}

就它而言，销毁所有克隆是否是您的调试日志声明它正在销毁多个项？如果是这样的话，碰撞可能真的会击中所有的克隆人，从而摧毁他们所有的克隆人。