Create Directory in Swift 3.0 - ios

Question

I am a new student in 9th grade learning swift, creating a school project .
I am trying to create a directory where I want to save a scanned file into pdf format.
While creating directory I am getting error below.
Error 1:
Cannot use instance member 'filemgr' within property initializer; property initializers run before 'self' is available.
Error 2:
Expected declaration
Code:
let filemgr = FileManager.default
let dirPaths = filemgr.urls(for: .documentDirectory, in: .userDomainMask)
let docsURL = dirPaths[0]
let newDir = docsURL.appendingPathComponent("data").path
do{
try filemgr.createDirectory(atPath: newDir,withIntermediateDirectories: true, attributes: nil)
} catch {
print("Error: \(error.localizedDescription)")
}
Please assist me in resolving this issue.
Thanks.

Answer 1

Please use this code:
Swift 5.0,
Swift 4.0 And
Swift 3.0
let DocumentDirectory = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0])
let DirPath = DocumentDirectory.appendingPathComponent("FOLDER_NAME")
do
{
try FileManager.default.createDirectory(atPath: DirPath!.path, withIntermediateDirectories: true, attributes: nil)
}
catch let error as NSError
{
print("Unable to create directory \(error.debugDescription)")
}
print("Dir Path = \(DirPath!)")

Answer 2

For Swift 4.0
Please use this
let fileManager = FileManager.default
if let tDocumentDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first {
let filePath = tDocumentDirectory.appendingPathComponent("\(FOLDER_NAME)")
if !fileManager.fileExists(atPath: filePath.path) {
do {
try fileManager.createDirectory(atPath: filePath.path, withIntermediateDirectories: true, attributes: nil)
} catch {
NSLog("Couldn't create document directory")
}
}
NSLog("Document directory is \(filePath)")
}

Answer 3

For Swift 4.0, I created the following extension off of URL that allows for the creation of a folder off of the documents directory within the application.
import Foundation
extension URL {
static func createFolder(folderName: String) -> URL? {
let fileManager = FileManager.default
// Get document directory for device, this should succeed
if let documentDirectory = fileManager.urls(for: .documentDirectory,
in: .userDomainMask).first {
// Construct a URL with desired folder name
let folderURL = documentDirectory.appendingPathComponent(folderName)
// If folder URL does not exist, create it
if !fileManager.fileExists(atPath: folderURL.path) {
do {
// Attempt to create folder
try fileManager.createDirectory(atPath: folderURL.path,
withIntermediateDirectories: true,
attributes: nil)
} catch {
// Creation failed. Print error & return nil
print(error.localizedDescription)
return nil
}
}
// Folder either exists, or was created. Return URL
return folderURL
}
// Will only be called if document directory not found
return nil
}
}
If the desired folder does not exist, it will create it. Then, assuming the folder exists, it returns the URL back to the user. Otherwise, if it fails, then nil is returned.
For example, to create the folder "MyStuff", you would call it like this:
let myStuffURL = URL.createFolder(folderName: "MyStuff")
This would return:
file:///var/mobile/Containers/Data/Application/4DE0A1C0-8629-47C9-87D7-C2B4F3A16D24/Documents/MyStuff/
You can also create nested folders with the following:
let myStuffHereURL = URL.createFolder(folderName: "My/Stuff/Here")
Which gives you:
file:///var/mobile/Containers/Data/Application/4DE0A1C0-8629-47C9-87D7-C2B4F3A16D24/Documents/My/Stuff/Here/

Answer 4

You are getting this because you are assigning value to newDir instance at wrong place.
I wrote your code in viewDidLoad and it works perfectly.

Answer 5

For Swift 5 and up Version
let documentDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let directoryURL = documentDirectoryURL.appendingPathComponent("FolderName", isDirectory: true)
if FileManager.default.fileExists(atPath: directoryURL.path) {
print(directoryURL.path)
} else {
do {
try FileManager.default.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
print(directoryURL.path)
} catch {
print(error.localizedDescription)
}