AppDelegate+Menus.swift

// MARK: - Menus

override func buildMenu(with builder: UIMenuBuilder) {
    super.buildMenu(with: builder)

    builder.insertChild(AppDelegate.fileMenu(), atStartOfMenu: .file)
    builder.insertChild(AppDelegate.viewMenu(), atStartOfMenu: .view)
    builder.remove(menu: .format)
    builder.remove(menu: .toolbar)
    builder.remove(menu: .help)
    builder.insertSibling(AppDelegate.helpMenu(), afterMenu: .window)
}

override func validate(_ command: UICommand) {
    switch command.action {
    case #selector(contactSupport):
        command.attributes = canContactSupport() ? [] : .disabled
    case #selector(insertNewWord):
        command.attributes = canInsertNewWord() ? [] : .disabled
    case #selector(insertNewFolder):
        command.attributes = canInsertNewFolder() ? [] : .disabled
    case #selector(openVocabularyPacks):
        command.attributes = canOpenVocabularyPacks() ? [] : .disabled
    case #selector(openFavorites):
        command.attributes = canOpenFavorites() ? [] : .disabled
    default:
        break
    }
}

// MARK: -

class func fileMenu() -> UIMenu {
    let newWord = UIKeyCommand(title: NSLocalizedString("New Word", comment: ""), image: nil, action: #selector(AppDelegate.insertNewWord), input: "n", modifierFlags: .command, propertyList: nil)
    let newFolder = UIKeyCommand(title: NSLocalizedString("New Folder", comment: ""), image: nil, action: #selector(AppDelegate.insertNewFolder), input: "n", modifierFlags: [.command, .shift], propertyList: nil)
    return UIMenu(title: "", image: nil, identifier: UIMenu.Identifier("com.studioamanga.memorii.menus.file"), options: .displayInline, children: [newWord, newFolder])
}

class func viewMenu() -> UIMenu {
    let favoritesCommand =
    UIKeyCommand(title: NSLocalizedString("Favorites", comment: ""), image: nil, action: #selector(AppDelegate.openFavorites), input: "1", modifierFlags: .command, propertyList: nil)
    let vocabularyCommand =
    UIKeyCommand(title: NSLocalizedString("Vocabulary Packs", comment: ""), image: nil, action: #selector(AppDelegate.openVocabularyPacks), input: "2", modifierFlags: .command, propertyList: nil)
    let viewMenu = UIMenu(title: "", image: nil, identifier: UIMenu.Identifier("com.studioamanga.memorii.menus.views"), options: .displayInline, children: [favoritesCommand, vocabularyCommand])
    return viewMenu
}

class func helpMenu() -> UIMenu {
    let contact = UIKeyCommand(title: NSLocalizedString("Contact Support", comment: ""), image: nil, action: #selector(AppDelegate.contactSupport), input: "", modifierFlags: [], propertyList: nil)
    return UIMenu(title: NSLocalizedString("Help", comment: ""), image: nil, identifier: UIMenu.Identifier("com.studioamanga.memorii.menus.help"), options: [], children: [contact])
}