Inner shadow in UITextField with rounded corners

Question

I want to implement this UITextField design:

In Zeplin here is the properties of the shadow:

What I have tried ?

override func layoutSubviews() {
    super.layoutSubviews()
    self.layer.cornerRadius = self.frame.size.height/2
    self.addInnerShadow()
}


private func addInnerShadow() {
    let innerShadow = CALayer()
    innerShadow.frame = bounds
    // Shadow path (1pt ring around bounds)
    let path = UIBezierPath(rect: innerShadow.bounds.insetBy(dx: -1, dy: -1))
    let cutout = UIBezierPath(rect: innerShadow.bounds).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 = 0.05
    innerShadow.shadowRadius = 3
    innerShadow.cornerRadius = self.frame.size.height/2
    layer.addSublayer(innerShadow)
}

result:

Update:

override func layoutSubviews() {
     super.layoutSubviews()
     self.layer.cornerRadius = self.frame.size.height/2
     self.addInnerShadow()
 }


private func addInnerShadow() {
    let innerShadow = CALayer()
    innerShadow.frame = bounds
    // Shadow path (1pt ring around bounds)
    let path = UIBezierPath(roundedRect: innerShadow.bounds.insetBy(dx: -1, dy: -1), cornerRadius: self.frame.size.height/2)
    let cutout = UIBezierPath(rect: innerShadow.bounds).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 = 0.05
    innerShadow.shadowRadius = 3
    //innerShadow.cornerRadius = self.frame.size.height/2
    layer.addSublayer(innerShadow)
}

result:

the corner radius is causing a problem because the path is still rectangular and the shadow looks different

Answer 1

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)
}