xcode – Swift-设置可见菜单控制器

概述我正在尝试显示UimenuController,但我无法查看它.我能怎么做？ let MenuController: UIMenuController = UIMenuController.sharedMenuController() MenuController.menuVisible = true MenuController.arrowDirection = UIMenuControll 我正在尝试显示UimenuController,但我无法查看它.我能怎么做？

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@H_419_12@解决方法 为了实际显示菜单,您需要执行以下 *** 作：  
  
>在获得sharedMenuController之前调用becomeFirstResponder()
>最后调用menu.setMenuVisible(true,animated：true)
>覆盖canBecomeFirstResponder函数
>覆盖canPerformAction函数
>为选择器编写功能
  
这是一个例子
  
  
func someFunc() {    becomeFirstResponder()    var menu = UIMenuController.sharedMenuController()    var deleteItem = UIMenuItem(Title: "Delete me",action: Selector("deleteline"))    menu.menuItems = [deleteItem]    menu.setTargetRect(CGRectMake(100,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}@H_419_12@                            	          总结       
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