ios - Create directory in app group container swift

Question

How can I go about creating a directory in my App's group container?

I've tried using as the file manager:

let directory: NSURL = NSFileManager.defaultManager().containerURLForSecurityApplicationGroupIdentifier("APP_GROUP_IDENTIFIER")!

but that doesn't create a directory...How can I go about creating a directory in this folder?

Answer 1

containerURLForSecurityApplicationGroupIdentifier returns the URL to the group container.
To create a directory append the new directory name as path component

let fileManager = NSFileManager.defaultManager()
if let directory = fileManager.containerURLForSecurityApplicationGroupIdentifier("APP_GROUP_IDENTIFIER") {
    let newDirectory = directory.URLByAppendingPathComponent("MyDirectory")
    try? fileManager.createDirectoryAtURL(newDirectory, withIntermediateDirectories: false, attributes: nil)
}

Swift 3:

let fileManager = FileManager.default
if let directory = fileManager.containerURL(forSecurityApplicationGroupIdentifier: "APP_GROUP_IDENTIFIER") {
    let newDirectory = directory.appendingPathComponent("MyDirectory")
    try? fileManager.createDirectory(at: newDirectory, withIntermediateDirectories: false, attributes: nil)
}