Copyable UILabel

CopyableLabel.swift

//
//  CopyableLabel.swift
//
//  Created by Wanbok Choi on 2016. 3. 17..
//

import UIKit

final class CopyableLabel: UILabel {
  
  override var canBecomeFirstResponder: Bool { return true }
  
  override init(frame: CGRect) {
    super.init(frame: frame)
    self.isUserInteractionEnabled = true
    self.addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(self.handleLongPressGesture(recognizer:))))
  }
  
  required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }
  
  override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    return action == #selector(self.copy(_:))
  }
  
  func handleLongPressGesture(recognizer: UIGestureRecognizer) {
    becomeFirstResponder()
    let menu = UIMenuController.shared
    if !menu.isMenuVisible {
      menu.setTargetRect(bounds, in: self)
      menu.setMenuVisible(true, animated: true)
    }
  }
  
  // MARK: - UIResponderStandardEditActions
  override func copy(_ sender: Any?) {
    UIPasteboard.general.string = text
  }
}