Xcode Swift-设置可见菜单控制器

我试图显示UimenuController，但无法查看它。我该怎么办

let MenuController: UIMenuController = UIMenuController.sharedMenuController()
 MenuController.menuVisible = true
 MenuController.arrowDirection = UIMenuControllerArrowDirection.Down
 MenuController.setTargetRect(CGRectMake(100, 80, 50, 50), inView: self.view)
 let MenuItem_1: UIMenuItem = UIMenuItem(title: "Menu", action: "delete:")
 let MenuItems: NSArray = [delete]
 MenuController.menuItems = MenuItems

---

要真正显示菜单，您需要执行以下操作：

在获取sharedMenuController之前调用becomeFirstResponder（）

调用菜单。最后设置菜单可见（true，动画：true）

覆盖canBecomeFirstResponder函数

覆盖canPerformAction功能

编写选择器的函数

这里有一个例子

func someFunc() {
    becomeFirstResponder()
    var menu = UIMenuController.sharedMenuController()
    var deleteItem = UIMenuItem(title: "Delete me", action: Selector("deleteLine"))
    menu.menuItems = [deleteItem]
    menu.setTargetRect(CGRectMake(100, 80, 50, 50), inView: self)
    menu.setMenuVisible(true, animated: true)
}

func deleteLine() {
    //Do something here
}

override func canBecomeFirstResponder() -> Bool {
    return true
}

override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
    // You need to only return true for the actions you want, otherwise you get the whole range of
    //  iOS actions. You can see this by just removing the if statement here.
    if action == Selector("deleteLine") {
        return true
    }
    return false
}

Swift 3版本代码：

func someFunc() {
    becomeFirstResponder()
    var menu = UIMenuController.shared
    var deleteItem = UIMenuItem(title: "Delete me", action: #selector(ViewController.deleteLine))
    menu.menuItems = [deleteItem]
    menu.setTargetRect(CGRect(x: 0.0, y: 0.0, width: 20, height: 20), in: self)
    menu.setMenuVisible(true, animated: true)
}

func deleteLine() {
    //Do something here
}

override var canBecomeFirstResponder: Bool {

        return true
    }

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        // You need to only return true for the actions you want, otherwise you get the whole range of
        //  iOS actions. You can see this by just removing the if statement here.
        if action == #selector(ViewController.deleteLine) {
            return true
        }

        return false
    }

---

更重要的一点是应该实现UIMenuItem的操作

你需要调用方法setMenuVisible:（BOOL）menuVisible animated:（BOOL）uiMenuController上的animated我不知道，请举一个例子非常感谢，如果我想在longpress点上方显示菜单，首先设置一个长按处理程序，然后你可以从longpress函数调用someFunc。长按功能有两种状态，您将关注UIGestureRecognitizerState.Begind和UIGestureRecognitizerState.End请接受这一正确答案。它工作得很好。谢谢：）@MassimoNegro您应该将此设置为已接受的答案。您不必打电话成为第一响应者someFunc@BhadreshKathiriya请尝试将“in:self”替换为您想要的对象。菜单将弹出“in:ui视图”