protected override async void OnAppearing() { base.OnAppearing(); var rankings = await http.GetTop10Ranking(); if (rankings.Count == 0) { await DisplayAlert("Ranking", "Não há usúarios cadastrados", "Ok"); } else { RankingUsers.Clear(); foreach (var rank in rankings) { RankingUsers.Add(rank); } RankingList.ItemsSource = RankingUsers; } RankingList.IsVisible = true; Loading.IsVisible = false; Loading.IsRunning = false; }