Long Press Copyable UILabel

ViewController.swift

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Create our textLabel
        let textLabel = MagicLabel(frame: CGRect(x: 50.0, y: 50.0, width: 200.0, height: 30.0))
        self.view.addSubview(textLabel)
        
        textLabel.text = "1234567890"
        
        // Allow user interaction with the label
        textLabel.userInteractionEnabled = true
        
        // Add the gesture recognizer
        let gestureRecognizer = UILongPressGestureRecognizer(target: self, action: "handleLongPress:")
        textLabel.addGestureRecognizer(gestureRecognizer)
    }
    
    func handleLongPress(recognizer: UIGestureRecognizer) {
        if let view = recognizer.view, let superview = recognizer.view?.superview {
            // First, let the label/view becomeFirstResponder
            view.becomeFirstResponder()
            
            // Next, grab the sharedMenuController and create a Copy item
            let menuController = UIMenuController.sharedMenuController()
            
            let copyItem = UIMenuItem(title: "Copy", action: "copyAction:")
            menuController.menuItems = [copyItem]
            
            menuController.setTargetRect(view.frame, inView: superview)
            
            // Finally, show the menu
            menuController.setMenuVisible(true, animated: true)
        }
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

/**
Our custom MagicLabel class which allows copying
*/
class MagicLabel: UILabel {
    
    override func canBecomeFirstResponder() -> Bool {
        return true
    }
    
    override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
        return action == "copyAction:"
    }
    
    func copyAction(sender: AnyObject) {
        UIPasteboard.generalPasteboard().setValue(self.text ?? "", forPasteboardType: "public.utf8-plain-text")
    }
    
}

nice & clean code with good explanation