CodeViewController.cs

using MvvmCross.Binding.BindingContext;
using MvvmCross.iOS.Views;
using iOSViewDemo.Core.ViewModels;
using UIKit;

namespace iOSViewDemo.iOS.Views
{
    public class CodeViewController : MvxViewController<FirstViewModel>
    {
        private UILabel UiLabel { get; } = new UILabel { TranslatesAutoresizingMaskIntoConstraints = false };
        private UITextField UiTextField { get; } = new UITextField { TranslatesAutoresizingMaskIntoConstraints = false };
        private UIButton UiButton { get; } = new UIButton { TranslatesAutoresizingMaskIntoConstraints = false };

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            this.View = new UIView { BackgroundColor = UIColor.White };

            UiButton.SetTitle("Download", UIControlState.Normal);
            UiButton.SetTitleColor(UIColor.Blue, UIControlState.Normal);
            UiTextField.BorderStyle = UITextBorderStyle.RoundedRect;

            View.AddSubviews(UiLabel, UiTextField, UiButton);
            var constraints = new[]
            {
                NSLayoutConstraint.Create(UiLabel, NSLayoutAttribute.Top, NSLayoutRelation.Equal, View,
                    NSLayoutAttribute.Top, 1, 80),
                NSLayoutConstraint.Create(UiLabel, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, View,
                    NSLayoutAttribute.CenterX, 1, 0),
                NSLayoutConstraint.Create(UiLabel, NSLayoutAttribute.Left, NSLayoutRelation.Equal, View,
                    NSLayoutAttribute.Left, 1, 33),
                NSLayoutConstraint.Create(UiTextField, NSLayoutAttribute.Width, NSLayoutRelation.Equal, UiLabel,
                    NSLayoutAttribute.Width, 1, 0),
                NSLayoutConstraint.Create(UiTextField, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, View,
                    NSLayoutAttribute.CenterX, 1, 0),
                NSLayoutConstraint.Create(UiTextField, NSLayoutAttribute.Top, NSLayoutRelation.Equal, UiLabel,
                    NSLayoutAttribute.Bottom, 1, 14),
                NSLayoutConstraint.Create(UiButton, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, View,
                    NSLayoutAttribute.CenterX, 1, 0),
                NSLayoutConstraint.Create(UiButton, NSLayoutAttribute.Top, NSLayoutRelation.Equal, UiTextField,
                    NSLayoutAttribute.Bottom, 1, 14)
            };
            View.AddConstraints(constraints);

            var set = this.CreateBindingSet<CodeViewController, FirstViewModel>();
            set.Bind(UiLabel).To(vm => vm.MyProperty);
            set.Bind(UiTextField).To(vm => vm.MyProperty);
            set.Bind(UiButton).To(vm => vm.MyCommand);
            set.Apply();

            var tap = new UITapGestureRecognizer(() => UiTextField.ResignFirstResponder());
            View.AddGestureRecognizer(tap);
        }
    }
}

StoryboardViewController.cs

using System;
using MvvmCross.Binding.BindingContext;
using MvvmCross.iOS.Views;
using iOSViewDemo.Core.ViewModels;
using UIKit;

namespace iOSViewDemo.iOS.Views
{
    [MvxFromStoryboard]
    public partial class StoryboardViewController : MvxViewController<FirstViewModel>
    {
        public StoryboardViewController(IntPtr handle) : base(handle)
        {
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            var set = this.CreateBindingSet<StoryboardViewController, FirstViewModel>();
            set.Bind(UiLabel).To(vm => vm.MyProperty);
            set.Bind(UiTextField).To(vm => vm.MyProperty);
            set.Bind(UiButton).To(vm => vm.MyCommand);
            set.Apply();

            var tap = new UITapGestureRecognizer(() => UiTextField.ResignFirstResponder());
            View.AddGestureRecognizer(tap);
        }
    }
}

XibViewController.cs

using MvvmCross.Binding.BindingContext;
using MvvmCross.iOS.Views;
using iOSViewDemo.Core.ViewModels;
using UIKit;

namespace iOSViewDemo.iOS.Views
{
    public partial class XibViewController : MvxViewController<FirstViewModel>
    {
        public XibViewController() : base("XibViewController", null)
        {
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            var set = this.CreateBindingSet<XibViewController, FirstViewModel>();
            set.Bind(UiLabel).To(vm => vm.MyProperty);
            set.Bind(UiTextField).To(vm => vm.MyProperty);
            set.Bind(UiButton).To(vm => vm.MyCommand);
            set.Apply();

            var tap = new UITapGestureRecognizer(() => UiTextField.ResignFirstResponder());
            View.AddGestureRecognizer(tap);
        }
    }
}