What is wrong with my code for getting the filenames in the document folder?
func listFilesFromDocumentsFolder() -> [NSString]?{
var theError = NSErrorPointer()
let dirs = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String]
if dirs != nil {
let dir = dirs![0] as NSString
let fileList = NSFileManager.defaultManager().contentsOfDirectoryAtPath(dir, error: theError) as [NSString]
return fileList
}else{
return nil
}
}
I thought I read the documents correctly and I am very sure about what is in the documents folder, but "fileList" does not show anything? "dir" shows the path to the folder.
Swift 2.0 Compability
func listWithFilter () {
let fileManager = NSFileManager.defaultManager()
// We need just to get the documents folder url
let documentsUrl = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as NSURL
do {
// if you want to filter the directory contents you can do like this:
if let directoryUrls = try? NSFileManager.defaultManager().contentsOfDirectoryAtURL(documentsUrl, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions.SkipsSubdirectoryDescendants) {
print(directoryUrls)
........
}
}
}
OR
func listFiles() -> [String] {
var theError = NSErrorPointer()
let dirs = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true) as? [String]
if dirs != nil {
let dir = dirs![0]
do {
let fileList = try NSFileManager.defaultManager().contentsOfDirectoryAtPath(dir)
return fileList as [String]
}catch {
}
}else{
let fileList = [""]
return fileList
}
let fileList = [""]
return fileList
}
This code prints out all the directories and files in my documents directory:
Some modification of your function:
func listFilesFromDocumentsFolder() -> [String]
{
let dirs = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.allDomainsMask, true)
if dirs != [] {
let dir = dirs[0]
let fileList = try! FileManager.default.contentsOfDirectory(atPath: dir)
return fileList
}else{
let fileList = [""]
return fileList
}
}
Which gets called by:
let fileManager:FileManager = FileManager.default
let fileList = listFilesFromDocumentsFolder()
let count = fileList.count
for i in 0..<count
{
if fileManager.fileExists(atPath: fileList[i]) != true
{
print("File is \(fileList[i])")
}
}
Simple and dynamic solution (Swift 5):
extension FileManager {
class func directoryUrl() -> URL? {
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
return paths.first
}
class func allRecordedData() -> [URL]? {
if let documentsUrl = FileManager.directoryUrl() {
do {
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil)
return directoryContents.filter{ $0.pathExtension == "m4a" }
} catch {
return nil
}
}
return nil
}}
Swift 5
// Get the document directory url
let documentsUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
// Get the directory contents urls (including subfolders urls)
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil)
print(directoryContents)
// if you want to filter the directory contents you can do like this:
let mp3Files = directoryContents.filter{ $0.pathExtension == "mp3" }
print("mp3 urls:",mp3Files)
let mp3FileNames = mp3Files.map{ $0.deletingPathExtension().lastPathComponent }
print("mp3 list:", mp3FileNames)
} catch {
print(error)
}
Apple states about NSSearchPathForDirectoriesInDomains(_:_:_:)
:
You should consider using the
FileManager
methodsurls(for:in:)
andurl(for:in:appropriateFor:create:)
which return URLs, which are the preferred format.
With Swift 5, FileManager
has a method called contentsOfDirectory(at:includingPropertiesForKeys:options:)
. contentsOfDirectory(at:includingPropertiesForKeys:options:)
has the following declaration:
Performs a shallow search of the specified directory and returns URLs for the contained items.
func contentsOfDirectory(at url: URL, includingPropertiesForKeys keys: [URLResourceKey]?, options mask: FileManager.DirectoryEnumerationOptions = []) throws -> [URL]
Therefore, in order to retrieve the urls of the files contained in documents directory, you can use the following code snippet that uses FileManager
's urls(for:in:)
and contentsOfDirectory(at:includingPropertiesForKeys:options:)
methods:
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
do {
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsDirectory, includingPropertiesForKeys: nil, options: [])
// Print the urls of the files contained in the documents directory
print(directoryContents)
} catch {
print("Could not search for urls of files in documents directory: \(error)")
}
As an example, the UIViewController
implementation below shows how to save a file from app bundle to documents directory and how to get the urls of the files saved in documents directory:
import UIKit
class ViewController: UIViewController {
@IBAction func copyFile(_ sender: UIButton) {
// Get file url
guard let fileUrl = Bundle.main.url(forResource: "Movie", withExtension: "mov") else { return }
// Create a destination url in document directory for file
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
let documentDirectoryFileUrl = documentsDirectory.appendingPathComponent("Movie.mov")
// Copy file to document directory
if !FileManager.default.fileExists(atPath: documentDirectoryFileUrl.path) {
do {
try FileManager.default.copyItem(at: fileUrl, to: documentDirectoryFileUrl)
print("Copy item succeeded")
} catch {
print("Could not copy file: \(error)")
}
}
}
@IBAction func displayUrls(_ sender: UIButton) {
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
do {
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsDirectory, includingPropertiesForKeys: nil, options: [])
// Print the urls of the files contained in the documents directory
print(directoryContents) // may print [] or [file:///private/var/mobile/Containers/Data/Application/.../Documents/Movie.mov]
} catch {
print("Could not search for urls of files in documents directory: \(error)")
}
}
}
A shorter syntax for SWIFT 3
func listFilesFromDocumentsFolder() -> [String]?
{
let fileMngr = FileManager.default;
// Full path to documents directory
let docs = fileMngr.urls(for: .documentDirectory, in: .userDomainMask)[0].path
// List all contents of directory and return as [String] OR nil if failed
return try? fileMngr.contentsOfDirectory(atPath:docs)
}
Usage example:
override func viewDidLoad()
{
print(listFilesFromDocumentsFolder())
}
Tested on xCode 8.2.3 for iPhone 7 with iOS 10.2 & iPad with iOS 9.3
Source: Stackoverflow.com