如何在 Swift 中以编程方式启用/禁用菜单对象

Question

我想Menu-Object在 Swift 中以编程方式启用/禁用。我发现了一些东西Apple Developer Library：https : //developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSMenuItem_Class/#//apple_ref/occ/instp/NSMenuItem/enabled

但是如何Menu-Object通过代码获取对 的引用并以编程方式设置其状态？

Answer 1

For Swift 4+, some of the code in Barath's Answer has become deprecated. I also think the code is more adaptable by searching for menuitem titles rather than their index:

let mainMenu = NSApplication.shared.mainMenu!
let subMenu = mainMenu.item(withTitle: "Edit")?.submenu

subMenu?.item(withTitle: "Cut")?.isEnabled = false

Also, setting isEnabled to true or false will not toggle menu items as long as setAutoenablesItems is set to true. It can be disabled from the storyboard or programmatically.