Custom renderer -> iOS UITableView

I'm trying to create a custom renderer for iOS for use in my .Forms project. The Android one is already working.
This renderer attempts to convert my "WallView" into a UITableView, but I end up with an empty UITableView which bounces back to the top on any attempt to scroll. Any ideas?

    [assembly:ExportRenderer(typeof(WallView), typeof(MyNS.iOS.Renderers.WallViewRenderer))]

    namespace MyNS.iOS.Renderers
    {

        public class WallViewRenderer : ViewRenderer<WallView, UITableView> {

            protected override void OnElementChanged (ElementChangedEventArgs<WallView> e)
            {
                base.OnElementChanged (e);
                var controller = new WallViewTableViewController (e.NewElement, UITableViewStyle.Plain);
                SetNativeControl(controller.TableView);
            }
        }

        . . .

and the matching UITableViewController:

public class WallViewTableViewController : UITableViewController
{
    public WallViewTableViewController (WallView view, UITableViewStyle style) : base (style)
    {
        _view = view;
    }

    WallView _view;

    const string Tag = "WallViewCell";

    public override int NumberOfSections (UITableView tableView)
    {
        return 1;
    }

    public override int RowsInSection (UITableView tableview, int section)
    {
        return _view.Items.Count;
    }

    public override UITableViewCell GetCell (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath)
    {
        var cell = new UITableViewCell (UITableViewCellStyle.Default, Tag);
        cell.ContentView.AddSubview (new UILabel () { Text = "hello world" });
        return cell;

    }

    public override float GetHeightForRow (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath)
    {
        return 44;
    }

}