//
// O2CanCopyUILabel.swift
// O2Platform
//
// Created by FancyLou on 2020年8月26日.
// Copyright © 2020 zoneland. All rights reserved.
//

import UIKit

// MARK: - 能够复制的UILabel
class O2CanCopyUILabel: UILabel {
 
 override init(frame: CGRect) {
 super.init(frame: frame)
 setEvent()
 }
 
 required init?(coder: NSCoder) {
 super.init(coder: coder)
 }
 
 override func awakeFromNib() {
 super.awakeFromNib()
 addLongPressGesture()
 }
 
 //必须实现的两个方法
 override var canBecomeFirstResponder: Bool {
 return true
 }
 
 override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
 if action == #selector(copyText) {
 return true
 }
 return false
 }
 
 private func setEvent() {
 addLongPressGesture()
 NotificationCenter.default.addObserver(forName: UIMenuController.willHideMenuNotification, object: nil, queue: nil) { (note) in
 self.backgroundColor = UIColor.white
 }
 }
 
 
 private func addLongPressGesture() {
 self.isUserInteractionEnabled = true
 let longTap = UILongPressGestureRecognizer.init(target: self, action: #selector(longTapRecognizer))
 // 长按手势最小触发时间
 longTap.minimumPressDuration = 1.0
 // 长按手势需要的同时敲击触碰数(手指数)
 longTap.numberOfTouchesRequired = 1
 // 长按有效移动范围(从点击开始,长按移动的允许范围 单位 px
// longTap.allowableMovement = 15
 self.addGestureRecognizer(longTap)
 }
 
 private func setMenuItems(){
 self.becomeFirstResponder()
 // 如果 Menu 已经被创建那就不再重复创建 menu
 if (UIMenuController.shared.isMenuVisible){
 return
 }
 let item1 = UIMenuItem.init(title: "复制", action: #selector(copyText))
 // 单例的形式获取menu
 let menu = UIMenuController.shared
 // 设置箭头方向
 menu.arrowDirection = .default
 // 设置 Menu 所显示的 items
 menu.menuItems = [item1]
 // 设置添加上 menu 的目标控件的 rect 和目标控件
 menu.setTargetRect(self.frame, in: self.superview!)
 // 令 Menu 可见
 menu.setMenuVisible(true, animated: true)
 }

 
 @objc private func longTapRecognizer(recognizer: UIGestureRecognizer) {
 if recognizer.state == .ended{
 self.backgroundColor = UIColor.white
 return
 }else if recognizer.state == .began{
 self.backgroundColor = UIColor.lightGray
 setMenuItems()
 }
 }
 
 @objc private func copyText() {
 let pboard = UIPasteboard.general
 pboard.string = self.text
 }
 
}