主要部分：

public GameObject prefab; //使用预制添加子物体

void Start () {

//f 为需要添加自物体的对象

GameObject fg = GameObject.Find("f");

//第一种 clone

//GameObject _Instance = Instantiate(prefab);

//_Instance.transform.parent =fg.transform;

//第二种 从Resources里进行加载

GameObject pfb = Resources.Load("name") as GameObject;

GameObject _Instance = Instantiate(pfb);

_Instance.transform.parent = f.transform;

}