[Xamarin][Mvvmcross] Failed to lookup the required marshalling information - xamarin

Question

I'm following mvvmcross tutorial for iOS project. I think I'm doing exactly for is described there, but when I run the appliaction I'm getting following error:
ObjCRuntime.RuntimeException
Message=Failed to lookup the required marshalling information.
Additional information:
Selector: setGenerositySlider:
Type: TipView
Source=
StackTrace:
at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.2.0.12/src/Xamarin.iOS/UIKit/UIApplication.cs:86
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/14.2.0.12/src/Xamarin.iOS/UIKit/UIApplication.cs:65
at TipCalc.iOS.Application.Main (System.String[] args) [0x00001] in C:\Users\MYUSERNAME\source\repos\xamarin\TipCalc.Core\TipCalc.iOS\Main.cs:12
I cloned the same project from the samples and it runs fine. I think I compared everything I could and projects are the same as far as I can tell.
namespace TipCalc.iOS
{
public class Application
{
// This is the main entry point of the application.
static void Main(string[] args)
{
// if you want to use a different Application Delegate class from "AppDelegate"
// you can specify it here.
UIApplication.Main(args, null, "AppDelegate");
}
}
}
namespace TipCalc.iOS
{
[Register(nameof(AppDelegate))]
public class AppDelegate : MvxApplicationDelegate<MvxIosSetup<App>, App>
{
public override UIWindow Window { get; set; }
public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
{
var result = base.FinishedLaunching(application, launchOptions);
return result;
}
}
}
public partial class TipView : MvxViewController<TipViewModel>
{
public TipView() : base(nameof(TipView), null)
{
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
var set = this.CreateBindingSet<TipView, TipViewModel>();
set.Bind(TipLabel).To(vm => vm.Tip);
set.Bind(SubTotalTextField).To(vm => vm.SubTotal);
set.Bind(GenerositySlider).To(vm => vm.Generosity);
set.Apply();
View.AddGestureRecognizer(new UITapGestureRecognizer(() =>
{
this.SubTotalTextField.ResignFirstResponder();
}));
}
}
Generated code behind
namespace TipCalc.iOS
{
[Register ("TipView")]
partial class TipView
{
[Outlet]
[GeneratedCode ("iOS Designer", "1.0")]
UISlider GenerositySlider { get; set; }
[Outlet]
[GeneratedCode ("iOS Designer", "1.0")]
UITextField SubTotalTextField { get; set; }
[Outlet]
[GeneratedCode ("iOS Designer", "1.0")]
UILabel TipLabel { get; set; }
void ReleaseDesignerOutlets ()
{
if (GenerositySlider != null) {
GenerositySlider.Dispose ();
GenerositySlider = null;
}
if (SubTotalTextField != null) {
SubTotalTextField.Dispose ();
SubTotalTextField = null;
}
if (TipLabel != null) {
TipLabel.Dispose ();
TipLabel = null;
}
}
}
}
What am I missing here?

Answer 1

I didn't set File's Owners class, adding it resolved the problem.