private void SetLayerFrame()
{
_trackLayer.Frame = new CGRect(0, (Bounds.Height * 0.25), Bounds.Width, Bounds.Height / 2);
_trackLayer.SetNeedsDisplay();
var leftX = _leftTouchPoint == CGPoint.Empty ? 50 : _leftTouchPoint.X;
_leftKnobLayer.Frame = new CGRect(leftX, 0, Bounds.Height, Bounds.Height);
_leftKnobLayer.SetNeedsDisplay();
}
public override bool BeginTracking(UITouch uitouch, UIEvent uievent)
{
var TouchPoint = uitouch.LocationInView(this);
if (_leftKnobLayer.Frame.Contains(TouchPoint))
{
_leftKnobLayer = TouchPoint;
_leftKnobLayer.Highlighted = true;
_leftKnobLayer.SetNeedsDisplay();
}
return(_leftKnobLayer.Highlighted);
}