Make UILabel Copyable in Swift 3. Special thanks to Stephen Radford and his "Make UILabel Copyable in Swift" article http://stephenradford.me/make-uilabel-copyable/

CopyableLabel.swift

//
//  CopyableLabel.swift
//
//  Created by Lech H. Conde on 01/11/16.
//  Copyright © 2016 Mavels Software & Consulting. All rights reserved.
//

import UIKit

class CopyableLabel: UILabel {
	
	override var canBecomeFirstResponder: Bool {
		return true
	}
	
	override init(frame: CGRect) {
		super.init(frame: frame)
		sharedInit()
	}
	
	required init?(coder aDecoder: NSCoder) {
		super.init(coder: aDecoder)
		sharedInit()
	}
	
	func sharedInit() {
		isUserInteractionEnabled = true
		addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(showMenu)))
	}
	
	func showMenu(sender: AnyObject?) {
		becomeFirstResponder()
		let menu = UIMenuController.shared
		if !menu.isMenuVisible {
			menu.setTargetRect(bounds, in: self)
			menu.setMenuVisible(true, animated: true)
		}
	}
	
	override func copy(_ sender: Any?) {
		let board = UIPasteboard.general
		board.string = text
		let menu = UIMenuController.shared
		menu.setMenuVisible(false, animated: true)
	}
	
	override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
		return action == #selector(UIResponderStandardEditActions.copy)
	}
}