public override void Show()
    {
        base.Show();

        if (!window)
        {
            window = container.GetComponent <AnnouncementWindowPre>();
        }
        //提示面板需要在打开以后请求网络 更新界面上的显示内容
    }
    public override void OnDestory()
    {
        SaveWhenDestory();

        window.errorNetWorkObj.btnExit.onClick.RemoveAllListeners();

        var button = window.AnnouncementObj.exit.GetComponent <Button>();

        if (button != null)
        {
            button.onClick.RemoveAllListeners();
        }

        base.OnDestory();
        window = null;
    }