public void OpenLevel <T>(LevelName levelName) where T : LevelBase
{
if (m_LevelNow != null)
{
CloseLevel();
}
GameObject Level = Mgr_AssetBundle.Instance.LoadAsset <GameObject>(ABTypes.prefab, levelName.ToString());
m_LevelNow = Instantiate(Level).GetComponent <T>() as LevelBase;
m_LevelNow.transform.SetParent(GameManager.Instance.m_MainGame.m_Level, false);
m_LevelNow.Init();
m_LevelNow.OnOpen();
}