public override void TouchesMoved(NSSet touches, UIEvent evt)
{
//for touch: AnyObject in touches
var touch = touches.AnyObject as UITouch;
if (touch != null)
{
//let newLocation = touch.location(in: self.view);
var newLocation = touch.GetPreciseLocation(View);
_shapeController.ContinueMove(
newLocation: SquareFillPoint(
//x: Int(newLocation.X),
x: Convert.ToInt16(newLocation.X),
y: Convert.ToInt16(newLocation.Y)));
}
}