A new way to do selectors in Swift 2.2.

NewSelectors.swift

private extension Selector {
    static let buttonPressed = #selector(ViewController.buttonPressed(_:))
}

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let button: UIButton = UIButton(type: UIButtonType.Custom)
        button.addTarget(self,
                         action: .buttonPressed,
                         forControlEvents: UIControlEvents.TouchUpInside)
    }
    
    func buttonPressed(sender: UIButton) {
        print("New selectors in Swift 2.2!")
    }
}