实例化
GameObject instance =(GameObject)Instantiate(prefab,transform.position,transform.rotation); 目标位置
GameObject instance = (GameObject)Instantiate(obj, new Vector3(0,0,0), transform.rotation); 新位置
销毁
public GameObject SFX_prefab;
GameObject.Destroy(SFX_prefab,2f); // 什么物体,多少时间销毁