UICollectionView using a UIViewController

gistfile1.cs

using System;
using System.Drawing;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace CollectionViewWithControllerDemo
{
    public class Controller : UIViewController
    {
        CVSource source;
        UICollectionViewFlowLayout layout;
        UICollectionView collectionView;

        public Controller ()
        {
            layout = new UICollectionViewFlowLayout {
                SectionInset = new UIEdgeInsets (20, 5, 5, 5),
                MinimumInteritemSpacing = 5,
                MinimumLineSpacing = 5,
                ItemSize = new SizeF (100, 100)
            };

            collectionView = new UICollectionView (UIScreen.MainScreen.Bounds, layout);
            collectionView.ContentSize = View.Frame.Size;

            source = new CVSource ();

            collectionView.RegisterClassForCell (typeof(TextCell), TextCell.CellId);
            collectionView.Source = source;
        }

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

            View = collectionView;
        }

        class CVSource : UICollectionViewSource
        {
            string[] data = { "one", "two", "three", "four" };

            public override int GetItemsCount (UICollectionView collectionView, int section)
            {
                return data.Length;
            }

            public override UICollectionViewCell GetCell (UICollectionView collectionView, NSIndexPath indexPath)
            {
                var textCell = (TextCell)collectionView.DequeueReusableCell (TextCell.CellId, indexPath);

                textCell.Text = data [indexPath.Row];

                return textCell;
            }

            public override void ItemSelected (UICollectionView collectionView, NSIndexPath indexPath)
            {
                Console.WriteLine ("Row {0} selected", indexPath.Row);
            }

            public override bool ShouldSelectItem (UICollectionView collectionView, NSIndexPath indexPath)
            {
                return true;
            }
        }

        class TextCell : UICollectionViewCell
        {
            UILabel label;

            public static readonly NSString CellId = new NSString ("TextCell");

            public string Text {
                get {
                    return label.Text;
                }
                set {
                    label.Text = value;
                    SetNeedsDisplay ();
                }
            }

            [Export ("initWithFrame:")]
            TextCell (RectangleF frame) : base (frame)
            {      
                label = new UILabel (ContentView.Frame) {
                    BackgroundColor = UIColor.Red,
                    TextColor = UIColor.Blue,
                    TextAlignment = UITextAlignment.Center
                };

                ContentView.AddSubview (label);
            }
        }
      
    }
}

Hi @mikebluestein, how to implement the UICollectionViewDataSource?
I am trying to use this (https://gist.github.com/aimore/2b95a8f561e09402c2610394c251c122) as XF CustomRenderer

@mikebluestein for some reason the text labels inside the TextCell are not showing up. I tried changing the background color for the collection and cell, and those changes are reflected o the screen, but that's not the case for the labels.

@mikebluestein All I get is a black screen, no text/label, just solid black ...