Get all the "*.xxx" files in the document directory in Swift 4

Question

I'm looking over the NSFileManager.h dox in Swift 4 and it seems it changed since I last used it (for the better!).

I'm wondering if contentsOfDirectoryAtURL:includingPropertiesForKeys, url or enumeratorAtURL:includingPropertiesForKeys provides a way to enumerate over a specific type of file, in my case images?

I've looked at the many Swift 2 answers and they all suggest looping and examining the name, and I want to be sure they haven't "fixed" this and I'm simply confused by the API?

Answer 1

Just filter the returned URLs by pathExtension

do {
    let docs = try FileManager.default.contentsOfDirectory(at: .documentsDirectory, includingPropertiesForKeys: nil, options:  .skipsHiddenFiles)
    let images = docs.filter{ $0.pathExtension == "xxx" }
    print(images)
} catch {
    print(error)
}