Круглая кнопочка с тенью (Circle button with shadow) - Swift 5

override func awakeFromNib() {
super.awakeFromNib()

self.layer.masksToBounds = false
self.layer.cornerRadius = self.frame.height / 2
self.layer.shadowColor = UIColor.gray.cgColor
self.layer.shadowOffset = CGSize(width: 1, height: 4)
self.layer.shadowOpacity = 0.7
self.layer.shadowRadius = 2
}