//销毁
 void OnDestroy()
 {
     _instance = null;
     timerManager.RemoveAll();
 }
        public TimerManager timerManager;//全局计时器管理器

        //注册
        public static void Regist()
        {
            if (_instance == null) 
                _instance = gbb.ManagerObject.AddComponent<TimeManager>();
        }