nathangitter

extension ViewController: UICollectionViewDelegate {
  
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print("selected item at \(indexPath)")
    }
  
}

extension ViewController: UICollectionViewDataSource {
  

nathangitter

class MyViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
  
    var foods = ["🍎", "🍌", "🍓"]
  
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print("selected item at \(indexPath)")
    }
  
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return foods.count

nathangitter

@IBOutlet weak var myCustomView: UIView! {
    didSet {
        view.backgroundColor = UIColor.blue
        view.layer.cornerRadius = myCustomView.bounds.width / 2
    }
}

nathangitter

lazy var myCustomView: UIView = {
    let view = UIView()
    view.backgroundColor = UIColor.blue
    view.layer.cornerRadius = myCustomView.bounds.width / 2
    return view
}()

nathangitter

var myCustomView = UIView()

override func viewDidLoad() {
    myCustomView.backgroundColor = UIColor.blue
    myCustomView.layer.cornerRadius = myCustomView.bounds.width / 2
}

nathangitter

class MyButton: UIButton {
    
    var action: (() -> ())?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        sharedInit()
    }
    
    required init?(coder aDecoder: NSCoder) {

nathangitter

override func viewDidLoad() {
    let button = MyButton()
    button.action = {
        print("MyButton pressed!")
    }
    view.addSubview(button)
}

nathangitter

override func viewDidLoad()
    let button = UIButton()
    button.addTarget(self, action: #selector(uiButtonAction), for: .touchUpInside)
    view.addSubview(button)
}

@objc private func uiButtonAction() {
    print("UIButton pressed!")
}