Swift - set cornerRadius and shadow at the same time - ios

Question

I'm trying to set a cornerRadius and a shadow(bottom + right) to my UICollectionViewCell but my code doesn't work. Neither the cornerRadius nor the shadow does appear..
Here's my code:
class MainWishlistCell: UICollectionViewCell {
let wishlistImage: UIImageView = {
let v = UIImageView()
v.translatesAutoresizingMaskIntoConstraints = false
v.image = UIImage(named: "logoGroß")
return v
}()
let wishlistLabel: UILabel = {
let v = UILabel()
v.translatesAutoresizingMaskIntoConstraints = false
v.text = "Main Wishlist"
v.font = UIFont(name: "AvenirNext-DemiBold", size: 18)
v.textColor = .darkGray
v.textAlignment = .center
return v
}()
func addShadow() {
let cornerRadius: CGFloat = 5
self.wishlistImage.layer.shadowPath = UIBezierPath(roundedRect: self.wishlistImage.bounds, cornerRadius: cornerRadius).cgPath
self.wishlistImage.layer.shadowRadius = cornerRadius
self.wishlistImage.layer.shadowOffset = .zero
self.wishlistImage.layer.shadowOpacity = 0.3
self.wishlistImage.layer.shadowRadius = 10
self.wishlistImage.layer.cornerRadius = cornerRadius
self.wishlistImage.layer.shadowColor = UIColor.black.cgColor
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() -> Void {
addShadow()
contentView.addSubview(wishlistImage)
contentView.addSubview(wishlistLabel)
// constrain view to all 4 sides
NSLayoutConstraint.activate([
wishlistImage.topAnchor.constraint(equalTo: contentView.topAnchor),
wishlistImage.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
wishlistImage.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
wishlistImage.heightAnchor.constraint(equalToConstant:150),
wishlistLabel.topAnchor.constraint(equalTo: wishlistImage.bottomAnchor,constant: 1),
wishlistLabel.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
wishlistLabel.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
wishlistLabel.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
])
}
}

Answer 1

Just add one line of code into addShadow() function:
layer.masksToBounds = false ---> which set the shadow of the view's layer.
Then add corner radius to your cell:
contentview.clipsToBounds = true

Answer 2

The problem is at that point
addShadow()
contentView.addSubview(wishlistImage)
contentView.addSubview(wishlistLabel)
The image bounds is zero
self.wishlistImage.layer.shadowPath = UIBezierPath(roundedRect:
self.wishlistImage.bounds,
cornerRadius: cornerRadius).cgPath
So you need
var once = true
override func layoutSubviews() {
super.layoutSubviews()
if once {
addShadow()
once = false
}
}