Пожалуйста, используйте расширение ниже для создания тени
extension UIView {
func addshadow(top: Bool,
left: Bool,
bottom: Bool,
right: Bool
) {
let shadowRadius: CGFloat = 2.0
self.layer.masksToBounds = false
self.layer.shadowOffset = CGSize(width: 0.0, height: 0.0)
self.layer.shadowRadius = shadowRadius
self.layer.shadowOpacity = 0.3
let path = UIBezierPath()
var x: CGFloat = 0
var y: CGFloat = 0
var viewWidth = self.frame.width
var viewHeight = self.frame.height
if (!top) {
y+=(shadowRadius+1)
}
if (!bottom) {
viewHeight-=(shadowRadius+1)
}
if (!left) {
x+=(shadowRadius+1)
}
if (!right) {
viewWidth-=(shadowRadius+1)
}
path.move(to: CGPoint(x: x, y: y))
path.addLine(to: CGPoint(x: x, y: viewHeight))
path.addLine(to: CGPoint(x: viewWidth, y: viewHeight))
path.addLine(to: CGPoint(x: viewWidth, y: y))
path.close()
self.layer.shadowPath = path.cgPath
}
}
использование -
button.addshadow(top: false, left: false, bottom: true, right: false)