iOS9 Swift File Creating NSFileManager.createDirectoryAtPath with NSURL

Swift 3

let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
let logsPath = documentsPath.appendingPathComponent("logs")
do {
    try FileManager.default.createDirectory(at: logsPath!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    NSLog("Unable to create directory \(error.debugDescription)")
}

Swift 4

let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
let logsPath = paths[0].appendingPathComponent("logs")
do {
    try FileManager.default.createDirectory(at: logsPath, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    NSLog("Unable to create directory \(error.debugDescription)")
}

I figured this one out. createDirectoryAtPath() is unable to process a path with the "file://" prefix. To get a path without the prefix you must use path() or relativePath().

let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
let logsPath = documentsPath.URLByAppendingPathComponent("logs")
do {
    try NSFileManager.defaultManager().createDirectoryAtPath(logsPath.path!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
    NSLog("Unable to create directory \(error.debugDescription)")
}

Incorrect path (notice file://):

file:///var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/

Correct path:

/var/mobile/Containers/Data/Application/F2EF2D4F-94AF-4BF2-AF9E-D0ECBC8637E7/Documents/logs/