如何使用C#为在Unity运行时创建的游戏对象分配一个on click侦听

public class ShapeGrid : MonoBehaviour {
    public GameObject[] shapes;

    void Start(){
        GameObject[,] shapeGrid = new GameObject[3,3];
        StartCoroutine(UpdateGrid());
    }

    IEnumerator UpdateGrid(){
        while (true) {
            SetGrid ();
            yield return new WaitForSeconds(2);
        }
    }

    void SetGrid(){
        int col = 3,row = 3;
        for (int y = 0; y < row; y++) {
            for (int x = 0; x < col; x++) {
                int shapeId = (int)Random.Range (0,4.9999f);
                GameObject shape = Instantiate (shapes[shapeId]);
                Vector3 pos = shapes [shapeId].transform.position;
                pos.x = (float)x*3;
                pos.y = (float)y*3;
                shapes [shapeId].transform.position = pos;
            }
        }
    }
}

我克隆了那些游戏对象,以便它们出现在这样的网格上：

当用户单击一个对象时,它应该消失.我所做的是将此脚本放在我的Game Objects数组中的每个元素上：

public class ShapeBehavior : MonoBehaviour {
    void Update(){
        if(Input.GetMouseButtonDown(0)){
            Destroy(this.gameObject);
        }
    }
}

但是当我点击一个对象来销毁它时,会破坏该对象的每个克隆.我只希望销毁特定的克隆,而不是一切.我怎么做？