How to Count Directories in iOS Documents Directory - swift

Question

I'm trying to count the number of directories in the iOS Documents Directory of my app using the following swift code:
let manager = NSFileManager.defaultManager()
let path: NSString = NSBundle.mainBundle().resourcePath!.stringByAppendingPathComponent("Documents")
var array = manager.contentsOfDirectoryAtPath(path, error: nil)
let count = array?.count
My Documents directory currently contains one directory but when I run this code, 'count' returns nil every time. Why is this?

Answer 1

Your method to find the Documents directory is wrong, NSBundle.mainBundle().resourcePath gives the path to the application bundle.
There is a dedicated function for this purpose:
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
And then you should use the error parameter and check the return value when
retrieving the directory contents:
let fileManager = NSFileManager.defaultManager()
var error : NSError?
if let files = fileManager.contentsOfDirectoryAtPath(documentsPath, error: &error) {
let count = files.count
// ...
} else {
println("Could not get contents of directory: \(error?.localizedDescription)")
}

Answer 2

Credit to Martin R. for the original answer! Here is a Swift 3 version incase anyone needs it...
Swift 3
func countFilesInDocumentsDirectory() {
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) [0] as String
do {
let files = try FileManager.default.contentsOfDirectory(atPath: documentsPath)
print("File count = \(files.count)")
for i in 0...files.count-1 {
print("FILE: \n\(files[i])")
}
} catch {
//...
}
}