How can I add shadow to a circle UIImageView or UIView?

Question

I am trying to make a circle UIImageView, and it works. Below is the way I use to make it:

[self.pic.layer setMasksToBounds:YES];
[self.pic.laye         


        

Answer 1

I created custom classes (swift 3 or 4) and it works very well :

class RoundShadowImageView: RoundView {

    var imageView = RoundImageView()

    var image: UIImage!  {
        didSet {
            imageView.image = image
        }
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(imageView)
        needsUpdateConstraints()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        addSubview(imageView)
        needsUpdateConstraints()
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        clipsToBounds = false
        layer.shadowColor = UIColor.black.cgColor
        layer.shadowOpacity = 0.1
        layer.shadowOffset = CGSize(width: 0, height: 10)
        layer.shadowRadius = 10
        layer.shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: frame.height / 2.0).cgPath
    }

    override func updateConstraints() {
        super.updateConstraints()

        imageView.snp.makeConstraints { (make) -> Void in
            make.height.width.equalTo(self)
            make.center.equalTo(self)
        }
    }
}

class RoundImageView: UIImageView {

    override func layoutSubviews() {
        super.layoutSubviews()
        let radius: CGFloat = self.bounds.size.height / 2.0
        layer.cornerRadius = radius
        clipsToBounds = true
    }
}

class RoundView: UIView {

    override func layoutSubviews() {
        super.layoutSubviews()
        let radius: CGFloat = self.bounds.size.height / 2.0
        layer.cornerRadius = radius
        clipsToBounds = true
    }
}

There are 2 classes to make a container and an image view round. And the main class which combines both of them: the one that you'll call.