Inner shadow in UITextField with rounded corners

问题:

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

回答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)
}

Result screenshot

回答2:

To attain this - I added a uiimageview and input the image as the shadow text cell, then placed a label on top of the uiimageview with a clear background so you are able to see the shadow image through the text. This was all done with storyboard so I have no code to show and am not allowed to upload an image yet. Hope this helps.