how can I remove the top border on UIToolBar

Question

I have set my UIToolBar tint color to some value, and there is this border line that I see in which I want to remove:

Answer 1

create a 1 pixel x 1 pixel clear image and call it clearPixel.png

toolbar.setShadowImage(UIImage(named: "clearPixel.png"), forToolbarPosition: UIBarPosition.any)