protected async override void OnAppearing()
        {
            try
            {
                if (_commonFun != null)
                {
                    var name = _commonFun.GetCach(CommonContext.USERNAMEKEY);

                    if (!string.IsNullOrEmpty(name))
                    {
                        userName.Text = name;
                    }
                }

                info = await App.CheckUpdate();

                if (info != null && !string.IsNullOrEmpty(info.appKey))
                {
                    UpdateNewVersion();
                }
            }
            catch
            {
            }
            base.OnAppearing();
        }