Swift 删除文档目录中的多个文件

我正在尝试创建一个函数，可以删除文档目录中具有给定文件扩展名的多个文件

到目前为止，我有下面的功能，但我可以在旧版上完成它来删除文件吗

static func searchFilesDocumentsFolder(Extension: String) {

        let documentsUrl =  NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first!

        do {
            let directoryUrls = try  NSFileManager.defaultManager().contentsOfDirectoryAtURL(documentsUrl, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions())
            //print(directoryUrls)
            let Files = directoryUrls.filter{ $0.pathExtension == Extension }.map{ $0.lastPathComponent }
            print("\(Extension) FILES:\n" + Files.description)
        } catch let error as NSError {
            print(error.localizedDescription)
        }
    }

---

适用于Swift 3和Swift 4.0

 let fileManager : FileManager = FileManager.default
    let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
    let nsUserDomainMask = FileManager.SearchPathDomainMask.userDomainMask
    let paths : NSArray = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true) as NSArray
    let documentsDirectory = paths.object(at: 0) as! NSString
    print(documentsDirectory)
    let contents : NSArray =  try! fileManager.contentsOfDirectory(atPath: documentsDirectory as String) as NSArray
    let enumerator : NSEnumerator = contents.objectEnumerator()
    while let element = enumerator.nextObject() as? String
    {
        let fileName = element as NSString
        if fileName.pathExtension == "m4a"
        {
            let pathOfFile = documentsDirectory.appendingPathComponent(fileName as String)
            try! fileManager.removeItem(atPath: pathOfFile)

        }
    }

---

谢谢，这是有效的，但是，从列表中无法删除一个文件--“20-01-2016_142531.mov”无法删除。知道为什么吗？在这种情况下，该方法会抛出一个错误，您可以调试。它应该告诉您原因，可能该文件是由另一个进程打开的。我能看到的唯一错误是

20-01-2016_142531.mov“无法删除。

问题在于您有一个文件名列表，而不是文件路径列表。您只需删除

.map{$0.lastPathComponent}

抛出的NSError（代码中的错误）有一个错误代码和一个userInfo字典，它应该会告诉您更多信息。如果这不能让你更进一步，你应该发布一个新的问题，这个问题和你的N错误的详细信息

 let fileManager : FileManager = FileManager.default
    let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
    let nsUserDomainMask = FileManager.SearchPathDomainMask.userDomainMask
    let paths : NSArray = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true) as NSArray
    let documentsDirectory = paths.object(at: 0) as! NSString
    print(documentsDirectory)
    let contents : NSArray =  try! fileManager.contentsOfDirectory(atPath: documentsDirectory as String) as NSArray
    let enumerator : NSEnumerator = contents.objectEnumerator()
    while let element = enumerator.nextObject() as? String
    {
        let fileName = element as NSString
        if fileName.pathExtension == "m4a"
        {
            let pathOfFile = documentsDirectory.appendingPathComponent(fileName as String)
            try! fileManager.removeItem(atPath: pathOfFile)

        }
    }