Inner shadow in UITextField with rounded corners
Just use a rounded rect path:
private func addInnerShadow() {
let innerShadow = CALayer()
innerShadow.frame = bounds
// Shadow path (1pt ring around bounds)
let radius = self.frame.size.height/2
let path = UIBezierPath(roundedRect: innerShadow.bounds.insetBy(dx: -1, dy:-1), cornerRadius:radius)
let cutout = UIBezierPath(roundedRect: innerShadow.bounds, cornerRadius:radius).reversing()
path.append(cutout)
innerShadow.shadowPath = path.cgPath
innerShadow.masksToBounds = true
// Shadow properties
innerShadow.shadowColor = UIColor.black.cgColor
innerShadow.shadowOffset = CGSize(width: 0, height: 3)
innerShadow.shadowOpacity = 0.15
innerShadow.shadowRadius = 3
innerShadow.cornerRadius = self.frame.size.height/2
layer.addSublayer(innerShadow)
}
Result screenshot