使用 Swift 获取已安装的卷列表？

Question

有谁知道如何获取使用 Swift 装载的所有可移动卷的列表？

我已经试过了，但是它 return 外部驱动程序的所有文件和子文件夹的列表：

let filemanager:NSFileManager = NSFileManager()
let files = filemanager.enumeratorAtPath("/Volumes")

while let file = files?.nextObject() {
    println(file)
    menu.addItem(NSMenuItem(title: file as! String, action: Selector(""), keyEquivalent: ""))
}

Answer 1

这将打印所有已安装卷的列表：

let filemanager = NSFileManager()
let keys = [NSURLVolumeNameKey, NSURLVolumeIsRemovableKey, NSURLVolumeIsEjectableKey]
let paths = filemanager.mountedVolumeURLsIncludingResourceValuesForKeys(keys, options: nil)
if let urls = paths as? [NSURL] {
    for url in urls {
        println(url)
    }
}

您当然可以过滤以仅获取 "Volumes" 目录中的路径：

let filemanager = NSFileManager()
let keys = [NSURLVolumeNameKey, NSURLVolumeIsRemovableKey, NSURLVolumeIsEjectableKey]
let paths = filemanager.mountedVolumeURLsIncludingResourceValuesForKeys(keys, options: nil)
if let urls = paths as? [NSURL] {
    for url in urls {
        if url.relativePath?.pathComponents.count > 1 {
            if url.relativePath?.pathComponents[1] == "Volumes" {
                println(url)
            }
        }
    }
}

与 Swift 2 有两个区别：为文件管理器的选项传递 [] 而不是 nil，并且不需要转换 NSURL 数组：

let filemanager = NSFileManager()
let keys = [NSURLVolumeNameKey, NSURLVolumeIsRemovableKey, NSURLVolumeIsEjectableKey]
let paths = filemanager.mountedVolumeURLsIncludingResourceValuesForKeys(keys, options: [])
if let urls = paths {
    for url in urls {
        if url.relativePath?.pathComponents.count > 1 {
            if url.relativePath?.pathComponents[1] == "Volumes" {
                print(url)
            }
        }
    }
}

更新 Swift 2.1

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)
        }
    }
}

更新 Swift 3

let keys: [URLResourceKey] = [.volumeNameKey, .volumeIsRemovableKey, .volumeIsEjectableKey]
let paths = FileManager().mountedVolumeURLs(includingResourceValuesForKeys: keys, options: [])
if let urls = paths {
    for url in urls {
        let components = url.pathComponents
        if components.count > 1
           && components[1] == "Volumes"
        {
            print(url)
        }
    }
}

Answer 2

在 Unix 系统上，系统文件编号为 2 的文件系统对象是挂载，无论是远程挂载（nfs、smb、afp）还是本地挂载。

这是一个例子：

let path = "/System/Volumes/Preboot"
let systemAttributes = try FileManager.default.attributesOfItem(atPath: String(describing: path))
if let fileSystemFileNumber = systemAttributes[.systemFileNumber] as? NSNumber {
    print("System File Number: \(fileSystemFileNumber)")
}

所以也许这可能是找到坐骑的捷径

使用 Swift 获取已安装的卷列表？

Get mounted volumes list with Swift?

macos

cocoa

swift

mounted-volumes