最后一步出問題的同學們，你們如果報錯Setting the parent of a transform which resides in a prefab is disabled to prevent data corruption.的話，就是因為Board.cs的crossObj.transform.SetParent(gameObject.transform);
crossObj.transform.localScale = Vector3.one;
這兩行應該是小寫，實例化后的對象，而不應是大寫的類
