public SurveyPage()
        {
            InitializeComponent();
            this.BindingContext = surveyMVVM = new SurveyMVVM(this);
            //NavigationPage.SetTitleIcon(this, "navIcon");


            //TODO MVVM  DUZELT TAM OLARAK !
            MessagingCenter.Subscribe <NewsFeedViewModel, string>(this, "keySurveyAnnc", async(arg1, key) =>
            {
                await getQuestionDetail(key);
                MessagingCenter.Instance.Unsubscribe <NewsFeedViewModel, string>(this, "keySurveyAnnc");
            });
            MessagingCenter.Subscribe <NotifyViewModel, string>(this, "keySurveyAnnc", async(arg1, key) =>
            {
                await getQuestionDetail(key);
                MessagingCenter.Instance.Unsubscribe <NotifyViewModel, string>(this, "keySurveyAnnc");
            });

            MessagingCenter.Subscribe <App, string>(this, MCenter.dataSurvey.ToString(), async(arg1, key) =>
            {
                MessagingCenter.Unsubscribe <App, string>(this, MCenter.dataSurvey.ToString());
                await getQuestionDetail(key);
            });
        }
        async public void saveUserResponse()
        {
            var mvvmHelper = new SurveyMVVM(this);
            //loading bar eklenecek
            string resp = string.Empty;
            await Navigation.PushPopupAsync(new LoadingPopPage(), true);

            resp = await service.saveUserReply(responseList, questionKey, child);

            await Navigation.PopPopupAsync(true);

            await Navigation.PopAllPopupAsync(true);

            if (!string.IsNullOrEmpty(resp))
            {
                await DisplayAlert("Tamamlandı", "Cevaplarınız alındı teşekür ederiz.", "Kapat");

                MessagingCenter.Send <SurveyQuestionList, string>(this, MCenter.deleteSurveyKey.ToString(), questionKey);
                await Navigation.PopAsync();
            }
            else
            {
                var chooseBtn = await DisplayAlert("Hata", "Bir problemle karşılaşıldı", "Tekrar dene", "Geri Dön");

                if (chooseBtn)
                {
                    saveUserResponse();
                }
                else
                {
                    await Navigation.PopAsync();
                }
            }
        }