swift可提示复制label

主要使用了UIMenuController ``` /// 支持复制的label class CYCopyLabel: UILabel, UIGestureRecognizerDelegate { /// 是否能copy open var isCopy: Bool = false private var startLocation: CGPoint = CGPoint.zero private var rotation: CGFloat = 0.0 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(popSelf(_:)) || action == #selector(rotationSelf(_:)) || action == #selector(ghostSelf(_:)) || action == #selector(copyText(_:)) { return true } //隐藏系统默认的菜单项 return false } @objc func popSelf(_ sender: Any?) { UIView.animate(withDuration: 0.25, animations: { self.transform = CGAffineTransform(scaleX: 1.5, y: 1.5) }) { Done in UIView.animate(withDuration: 0.25, animations: { self.transform = CGAffineTransform.identity }) } } @objc func rotationSelf(_ sender: Any?) { UIView.animate(withDuration: 0.25, animations: { self.transform = CGAffineTransform(rotationAngle: self.rotation + .pi * 0.5) }) { done in self.rotation = .pi * 0.5 + self.rotation } } @objc func ghostSelf(_ sender: Any?) { UIView.animate(withDuration: 1.25, animations: { self.alpha = 0.0 }) { done in UIView.animate(withDuration: 1.25, animations: { }) { done in UIView.animate(withDuration: 0.5, animations: { self.alpha = 1.0 }) } } } @objc func copyText(_ sender: UIMenuController?) { if let menuItems = sender?.menuItems { print("title :\(menuItems)") } let pboard = UIPasteboard.general pboard.string = text print("复制成功\(String(describing: text))") } //UILabel默认是不接收事件的，我们需要自己添加touch事件 func attachTapHandler() { isUserInteractionEnabled = true let touch = UILongPressGestureRecognizer(target: self, action: #selector(handleTap(_:))) touch.minimumPressDuration = 1 touch.delegate = self addGestureRecognizer(touch) } //绑定事件 override init(frame: CGRect) { super.init(frame: frame) attachTapHandler() } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } @objc func handleTap(_ recognizer: UIGestureRecognizer) { if isCopy == false { return } if recognizer.state == .began { if self.becomeFirstResponder() == false { return } let menuCtrl = UIMenuController.shared let item = UIMenuItem.init(title: "复制", action: #selector(copyText(_:))) menuCtrl.menuItems = [item] if let view = self.superview { menuCtrl.setTargetRect(self.frame, in: view) } menuCtrl.setMenuVisible(true, animated: true) } } } ```