前言

• 默认UIView继承了UIResponse类，通过该类创建UIMenuController可快捷的实现复制、删除、粘贴等功能；
• 可实现的按钮类型包括 剪切、复制、粘贴、选择等，具体可以查看UIKit内的UIResponder.h文件；

重写属性与方法

class CustomView: UIView {
    // 使视图具有响应性
    override var canBecomeFirstResponder: Bool { true }

    override func copy(_ sender: Any?) {
        // 复制
    }

    override func paste(_ sender: Any?) {
        // 粘贴
    }

    override func select(_ sender: Any?) {
        // 选择
    }

    override func delete(_ sender: Any?) {
        // 删除
    }
}

添加手势事件

extension CustomView {
    func setupMenu() {
        let gesture = UILongPressGestureRecognizer(target: self, action: #selector(longPressAction(_:)))
        addGestureRecognizer(gesture)
    }

    @objc func longPressAction(_ sender: UILongPressGestureRecognizer) {
        if sender.state == .began {
            becomeFirstResponder()
            let menu = UIMenuController.shared
            menu.setTargetRect(视图.bounds, in: 视图)
            menu.setMenuVisible(true, animated: true)
        }
    }
}

至此就完成了MENU的设置