可可Swift，在文件和目录上获取/设置隐藏(可见/不可见)标志 [英] Cocoa Swift, get/set hidden (visible/invisible) flag on files and directories

问题描述

我想测试文件系统上的文件或目录是否具有特定标志，在这种情况下为"hidden"标志，然后对其进行设置或删除.我知道可以通过命令行实现此功能，但是我想知道是否可以使用Cocoa/Swift做到这一点?

I want to test if a file or directory on the file system has a certain flag, in this case the 'hidden' flag and then set it or remove it. I know this is possible through the command line, but I was wondering if I could do it with Cocoa/Swift?

我尝试使用NSFileManager attributesOfItemAtPath，但是返回的对象不包含标志.

I tried using NSFileManager attributesOfItemAtPath, but the returned object does not contain the flags.

示例:

let fm = NSFileManager.defaultManager()

do {
    let testLibrary = try fm.attributesOfItemAtPath(dataPath)
    print (testLibrary)
} catch let error as NSError {
    print("JSON Error: \(error.localizedDescription)")
}

返回:

["NSFileCreationDate": 2013-08-16 21:37:57 +0000,
 "NSFileGroupOwnerAccountName": staff, 
 "NSFileType": NSFileTypeDirectory, 
 "NSFileSystemNumber": 16777220, 
 "NSFileOwnerAccountName": xjx, 
 "NSFileReferenceCount": 61, 
 "NSFileModificationDate": 2015-10-22 07:25:12 +0000, 
 "NSFileExtensionHidden": 0, 
 "NSFileSize": 2074,
 "NSFileGroupOwnerAccountID": 20, 
 "NSFileOwnerAccountID": 501, 
 "NSFilePosixPermissions": 448, 
 "NSFileSystemFileNumber": 603923]

为了进行比较，当我在主目录中执行ls -lO时，会看到以下内容(请注意库"上的隐藏标志):

For comparison, when I do ls -lO in my home directory, I see the following (notice the hidden flag on 'Library'):

drwx------+ 49 xjx  staff  -        1666 Jan 11 19:43 Downloads
drwx------@ 28 xjx  staff  -         952 Jan 11 08:40 Dropbox
drwx------@ 61 xjx  staff  hidden   2074 Oct 22 09:25 Library
drwx------+  7 xjx  staff  -         238 Apr 30  2015 Movies
drwx------+  5 xjx  staff  -         170 Jun 14  2015 Music

推荐答案

以前的答案并没有完全起作用，但是它们使我以正确的方式进行工作，因此我设法找到了满足我需求的解决方案.

Previous answers didn't work completely, but they set me on the right way, so I managed to find a solution that satisfies my needs.

获取:

let myUrl = NSURL(fileURLWithPath: "my/path")
var isHidden: AnyObject?

do {
    try myUrl.getResourceValue(&isHidden, forKey: NSURLIsHiddenKey)
    return (isHidden as? NSNumber)?.boolValue ?? false
} catch let error as NSError {
    print(error.debugDescription)
    return false
}

设置:

let myUrl = NSURL(fileURLWithPath: "my/path")

do {
    try libraryUrl.setResourceValue(true, forKey: NSURLIsHiddenKey)
} catch let error as NSError {
    print(error.localizedDescription)
    return
}

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