- 封装一个长按label进行文字复制的效果,其他不多说,直接上代码:
class PPEventCopyLabText: UILabel {
override init(frame: CGRect) {
super.init(frame: frame)
setEvent()
}
// required init?(coder aDecoder: NSCoder) {
// fatalError("init(coder:) has not been implemented")
// }
required init?(coder: NSCoder) {
super.init(coder: coder)
// setEvent()
}
override func awakeFromNib() {
super.awakeFromNib()
addLongPressGesture()
}
// MARK: - 必须实现的两个方法
// 重写返回
override var canBecomeFirstResponder: Bool {
return true
}
// 可以响应的方法
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
}
}
// UILabel默认是不接收事件的,添加touch事件
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)
}
@objc func longTapRecognizer(recognizer:UIGestureRecognizer){
if recognizer.state == .ended{
print("ended")
self.backgroundColor = UIColor.white
return
}else if recognizer.state == .began{
print("began")
self.backgroundColor = UIColor.lightGray
setMenuItems()
}
}
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))
let item2 = UIMenuItem.init(title: "复制个毛线", 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,item2]
// 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)
}
// MARK: 点击复制响应的方法
// 内容复制到粘贴板
@objc private func copyText(){
let pboard = UIPasteboard.general
pboard.string = self.text
print(self.text ?? "11111")
}
}
func pp_CopyText(){
let tapLabel = PPEventCopyLabText.init(frame: CGRect(x: 0, y: 100, width: view.frame.width, height: 50))
tapLabel.text = "我是label的文字,可以长按进行复制"
tapLabel.textAlignment = .center
tapLabel.font = UIFont.systemFont(ofSize: 18)
view.backgroundColor = UIColor.blue
view.addSubview(tapLabel)
}
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