How to loop over multiple (audio / mp3) files in a swift directory? - Swift, iOS8 Soundboard AVPlayer

I am trying to build a sound board using Swift to play around and learn about swift / iOS8.

This is what I did in my TableViewController:

var soundPath = NSBundle.mainBundle().pathForResource("RandomSound", ofType: "m4a")
var soundURL = NSURL.fileURLWithPath(soundPath!)        
self.audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil)
self.audioPlayer.play()

      

        
        
        
      

    

This works to play audio as expected. Now, to have a few more sounds and display them in the tableView, I created an array of the Sound class that looks like this:

class Sound {
    var name: [String]
    var fileURL = NSURL()
    // more fields as required
}

      

        
        
        
      

    

and then using it like this:

var sounds: [Sound] = []
sounds.name = "RandomSound"
sounds.fileURL = soundURL!

      

        
        
        
      

    

However, I want something to improve it. Let's say I have a bunch of mp3 files in one folder (e.g. 100).

In this case, I need some mechanism whereby I can just specify the directory and / or file type and then the remaining heavy lifting, like looking through each file in the directory and looking for the name / artist / and other information is extracted from the mp3 files ID3 tags (or something similar).

If not all data, at least filling in the name / url field and looping through all the files in the directory should be possible to automate , but I can't figure out what I should be looking at to achieve this.

EDIT

This part allows me to scan all files in a directory of a given file type. In my case, I am looking for mp3. This is what I came up with:

soundArray: [soundElement] = []
let fileManager = NSFileManager.defaultManager()
let directoryPath = "/path/to/directory/containing/my/sound/files"
let enumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(directoryPath)!
while let element = enumerator.nextObject() as? String {
    if element.hasSuffix("mp3") { // checks the extension
        // DO my sound path stuff here
        //println(element)
        let soundURL = NSURL.fileURLWithPath(directoryPath + element)       

        //Of course I'll not be playing them directly here, (I don't see why) but if I needed to ...
        //self.audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil)
        //self.audioPlayer.play()
        //Instead it just makes sense to populate some array/dict containing all the sounfURLs
        soundElement.name = String(element)
        soundElement.fileURL = soundURL
        self.soundArray.append(soundElement)

    }
}

class soundElement {
    var name = " "
    var fileURL = NSURL()
}

      

        
        
        
      

    

I still don't understand how to get ID3 information from mp3 files in swift. I have passed the AVAsset information to https://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVAsset_Class/index.html#//apple_ref/occ/cl/AVAsset but it is not clear yet how to use it.