private async Task <IEnumerable <Pin> > GetData(uint startIndex, int page) { PinListVM.PinList.HasMore(); IsLoading = true; try { var list = await CategoryAPI.GetCategoryPinList("/all/", 20, PinListVM.GetMaxPinID()); if (list?.Count == 0) { PinListVM.PinList.NoMore(); } else { PinListVM.PinList.HasMore(); } return(list); } catch (Exception ex) { } finally { IsLoading = false; } return(null); }