Swipe.cs

PointF startLoc;
int iX_Min = 12;
int iY_Max = 4;


public override void TouchesBegan(NSSet touches, UIEvent evt)
{
	var touch = touches.AnyObject as UITouch;
	Console.Out.WriteLine("TouchesBegan:" + touch.TapCount);

	startLoc = touch.PreviousLocationInView( this.View );

}

public override void TouchesMoved(NSSet touches, UIEvent evt)
{
	var touch = touches.AnyObject as UITouch;
	Console.Out.WriteLine("TouchesMoved");

	PointF currentLoc = touch.PreviousLocationInView(this.View);

	float fMovingX = startLoc.X - currentLoc.X;
	float fMovingY = startLoc.Y - currentLoc.Y;

	if (Math.Abs(fMovingX) >= iX_Min && Math.Abs(fMovingY) >= iY_Max)
	{
		Console.Out.WriteLine("It's Swipe!");
		if (fMovingX > 0)
		{
			Console.Out.WriteLine("LeftSwipe");
		}
		else
		{
			Console.Out.WriteLine("RightSwipe");
		}
	}
	else
	{
		Console.Out.WriteLine("etc");
	}
}