// 1. Create your view, enable autolayout, and add it to the view hierarchy.
let cardView = ScrollingCardView()
cardView.translatesAutoresizingMaskIntoConstraints = false
parentView.addSubview(cardView) // e.g. parent could be the ViewController's view


// 2. Constrain the card view as you would any other view.
NSLayoutConstraint.activate([
    cardView.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor, constant: 16),
    cardView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
    cardView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),

    // If you don't constrain the height, the card will grow to match its
    // intrinsic content size.

    // Or use lessThanOrEqualTo to allow your card view to grow only until a
    // certain size, e.g. the size of the screen.
    cardView.bottomAnchor.constraint(lessThanOrEqualTo: bottomLayoutGuide.topAnchor, constant: -16),

    // Or you can constrain it to a particular height:
    // cardView.bottomAnchor.constraint(equalTo: bottomLayoutGuide.topAnchor, constant: -16),
    // cardView.heightAnchor.constraint(equalToConstant: 300),
])


// 3. Set your card view's content.
let content = UILabel()
content.text = "Hello world!"
content.numberOfLines = 0

cardView.contentView = content

cardView.backgroundColor = .white

cardView.cornerRadius = 2

cardView.layer.shadowOffset = CGSize(width: 0, height: 2)
cardView.layer.shadowRadius = 2
cardView.layer.shadowOpacity = 0.4