void AddClicked(object sender, EventArgs e)
{
City newCity = new City();
var cityDetailPage = new CityDetailsPage();
cityDetailPage.BindingContext = newCity;
cityList.IsVisible = false;
Navigation.PushAsync(cityDetailPage);
}
void citySelected(object sender, SelectedItemChangedEventArgs e)
{
if (e.SelectedItem != null)
{
var city = (City)e.SelectedItem;
var cityDetailPage = new CityDetailsPage();
cityDetailPage.BindingContext = city;
cityList.IsVisible = false;
Navigation.PushAsync(cityDetailPage);
}
}