方法一:GameObject objPrefab = (MonoBehaviour.Instantiate(mPrefab, Vector3.zero, Quaternion.identity) as GameObject);
方法二:GameObject objPrefab = (GameObject)Resources.Load("Prefabs/myPrefab");
方法三:GameObject objPrefab = (GameObject)Instantiate(AssetDatabase.LoadAssetAtPath(filePath,typeof(GameObject)));