RepeaterView.cs

public class RepeaterView : StackLayout
    {
        public static readonly BindableProperty ItemTemplateProperty =
            BindableProperty.Create("ItemTemplate", typeof(DataTemplate), typeof(RepeaterView));

        public static readonly BindableProperty ItemsSourceProperty =
            BindableProperty.Create("ItemsSource", typeof(IEnumerable), typeof(RepeaterView), Enumerable.Empty<object>(), BindingMode.OneWay, null, ItemsChanged);

        public IEnumerable ItemsSource
        {
            get { return (IEnumerable)GetValue(ItemsSourceProperty); }
            set { SetValue(ItemsSourceProperty, value); }
        }

        public DataTemplate ItemTemplate
        {
            get { return (DataTemplate)GetValue(ItemTemplateProperty); }
            set { SetValue(ItemTemplateProperty, value); }
        }

        private static void ItemsChanged(BindableObject bindable, object oldvalue, object newvalue)
        {
            var repeater = (RepeaterView)bindable;
            repeater.Children.Clear();

            var collection = newvalue as INotifyCollectionChanged;

            if (collection != null)
            {
                collection.CollectionChanged += (sender, args) =>
                {
                    foreach (string newItem in args.NewItems)
                        AddChildView(newItem, repeater);
                };
            }

            foreach (var viewModel in (IEnumerable)newvalue)
            {
                AddChildView(viewModel, repeater);
            }
        }

        private static void AddChildView(object viewModel, RepeaterView repeater)
        {
            var content = repeater.ItemTemplate.CreateContent();
            if (!(content is View) && !(content is ViewCell))
            {
                throw new Exception(nameof(content) + " - Invalid visual object: " + content.GetType());
            }

            var view = (content is View) ? content as View : ((ViewCell)content).View;
            view.BindingContext = viewModel;

            repeater.Children.Add(view);
        }
    }