swift - 在菜单栏子菜单中列出所有已安装的卷(仅以编程方式)

Question

我目前正在做一个“仅菜单栏”项目，我需要在菜单栏应用程序的子菜单中列出所有已安装的卷。我想出了如何打印()所有已安装的卷，但我需要子菜单的帮助(没有 .xib 或 .storyboard 工作)这是我的“listVolumes func”

    func listVolumes(sender: NSMenuItem) {
    let keys = [NSURLVolumeNameKey, NSURLVolumeIsRemovableKey, NSURLVolumeIsEjectableKey]
    let paths = NSFileManager().mountedVolumeURLsIncludingResourceValuesForKeys(keys, options: [])
    if let urls = paths {
        for url in urls {
            if let components = url.pathComponents
                where components.count > 1
                    && components[1] == "Volumes" {
                print(url)
            }
        }
    }
}

下面是我的“菜单栏应用程序”代码

    let statusItem = NSStatusBar.systemStatusBar().statusItemWithLength(-2)

func applicationDidFinishLaunching(aNotification: NSNotification) {

    if let button = statusItem.button {
        button.image = NSImage(named: "StatusBarButtonImage")
    }
    let menu = NSMenu()

    menu.addItem(NSMenuItem(title: "Volumes", action: Selector("volumes:"), keyEquivalent: ""))
    menu.addItem(NSMenuItem.separatorItem())
    menu.addItem(NSMenuItem(title: "Help", action: Selector("help:"), keyEquivalent: ""))
    menu.addItem(NSMenuItem.separatorItem())
    menu.addItem(NSMenuItem(title: "Quit", action: Selector("terminate:"), keyEquivalent: "q"))

    statusItem.menu = menu

}

所以我的问题是，如何创建一个包含所有已安装驱动器的子菜单(仅以编程方式)

Answer 1

例如，您必须为 volumes 菜单项设置子菜单

let volumesMenuItem = NSMenuItem(title: "Volumes", action: Selector("volumes:"), keyEquivalent: "")
menu.addItem(volumesMenuItem)
let volumesMenu = NSMenu(title: "Volumes")
volumesMenuItem.submenu = volumesMenu

我建议从您的 listVolumes() 函数返回一个名称数组，然后您可以将菜单项添加到 volumesMenu 假设 volumes包含名称

for volumeName in volumes {
    volumesMenu.addItem(NSMenuItem(title: volumeName, action: Selector("selectVolume"), keyEquivalent: ""))
}