UIButton bottom shadow

Question

I have a UIButton which is very similar to the standard iOS keyboard alphabet button.

I am not sure how to create a shadow only for the bottom layer li

Answer 1

Put this method into your UIView extension and play with offset value

func drawShadow(shadowColor: UIColor = UIColor.black, opacity: Float =
0.3, offset: CGSize, radius: CGFloat = 5, shouldRasterize : Bool = false) {
        self.layer.shadowColor = shadowColor.cgColor
        self.layer.shadowOpacity = opacity
        self.layer.shadowOffset = offset
        self.layer.shadowRadius = radius
        self.layer.shouldRasterize = shouldRasterize
    }