ViewController that follows fingers.

FollowFingerViewController

public partial class FollowFingerViewController : UIViewController
{
	static bool UserInterfaceIdiomIsPhone {
		get { return UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone; }
	}
	
	UIView _square;
	
	public FollowFingerViewController ()
	{
		_square = new UIView ();
		_square.BackgroundColor = UIColor.Blue;
		_square.Frame = new RectangleF (0, 0, 100, 100);
		Add (_square);
	}
	
	public override void TouchesMoved (NSSet touches, UIEvent evt)
	{
		base.TouchesMoved (touches, evt);
	
		UITouch touch = touches.AnyObject as UITouch;
		var point = touch.LocationInView (View);
		_square.Frame = new RectangleF(point, new SizeF(100,100));
	}
	
	public override void DidReceiveMemoryWarning ()
	{
		// Releases the view if it doesn't have a superview.
		base.DidReceiveMemoryWarning ();
		
		// Release any cached data, images, etc that aren't in use.
	}
	
	public override void ViewDidLoad ()
	{
		base.ViewDidLoad ();
		
		// Perform any additional setup after loading the view, typically from a nib.
	}
	
	public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
	{
		// Return true for supported orientations
		if (UserInterfaceIdiomIsPhone) {
			return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown);
		} else {
			return true;
		}
	}
}