public void CreateFirstButton()
        {
            foreach (C_NavigationObj son in firstlayer)
            {
                Button btn = Instantiate(buttonPrefab, menu.GetChild(0));
                btn.transform.name = son.name;
                btn.GetComponentInChildren <Text>().text = son.name;


                C_NavigationBtn objBtn = btn.GetComponent <C_NavigationBtn>();
                objBtn.manager = this;
                objBtn.obj     = son;
                objBtn.AddClickListener();
            }
        }
        /// 点这个物体,出他的子菜单
        public void CreateButton(C_NavigationObj obj)
        {
            int layer = obj.layer;

            Transform parent = panelS[layer];

            foreach (C_NavigationObj son in obj.sonS)
            {
                Button btn = Instantiate(buttonPrefab, parent);
                btn.transform.name = son.name;
                btn.GetComponentInChildren <Text>().text = son.name;

                C_NavigationBtn objBtn = btn.GetComponent <C_NavigationBtn>();
                objBtn.manager = this;
                objBtn.obj     = son;
                objBtn.AddClickListener();
                //btn.onClick.AddListener(()=>Show(obj));
            }
        }