private async void HandleStepChanged(OrderStep oldStep, OrderStep newStep)
{
if (oldStep == newStep)
{
return;
}
var fromController = _currentPresentedStep;
var toController = default(UIViewController);
if (newStep == OrderStep.EnterDeliveryAddress)
{
toController = new AddressBarView
{
ViewModel = this.ViewModel.AddressBar,
};
}
else if (newStep == OrderStep.ConfirmDelivery)
{
toController = new ConfirmationView()
{
ViewModel = this.ViewModel.Confirmation,
};
}
else if (newStep == OrderStep.AwaitingDelivery)
{
toController = new StatusView()
{
ViewModel = this.ViewModel.Status,
};
}
else
{
throw new InvalidOperationException();
}
fromController.WillMoveToParentViewController(null);
toController.View.Frame = new CGRect(0, TopLayoutGuide.Length, View.Bounds.Width, toController.View.Bounds.Height);
AddChildViewController(toController);
await this.TransitionAsync(fromController, toController, .6, UIViewAnimationOptions.TransitionCrossDissolve, () => {
fromController.RemoveFromParentViewController();
fromController.Dispose();
toController.DidMoveToParentViewController(this);
});
_currentPresentedStep = toController;
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
_mapView = new MapKit.MKMapView(View.Bounds);
View.Add(_mapView);
new GeocoderViewControllerAdapter(this, _mapView, ViewModel.NotifyAddressChanged);
var addressBar = new AddressBarView();
AddChildViewController(addressBar);
View.Add(addressBar.View);
addressBar.DidMoveToParentViewController(this);
_currentPresentedStep = addressBar;
var set = this.CreateBindingSet <PizzaDeliveryView, Core.PizzaDeliveryViewModel>();
set.Bind(addressBar).For(v => v.DataContext).To(vm => vm.AddressBar);
set.Bind().For(v => v.Step).To(vm => vm.Step);
set.Apply();
}