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I have added audio files to my Xcode project so that i can play them locally using AvQueuePlayer (a subclass of AVPlayer). In order to do this I must create an array of [AVPlayerItems] which is then supplied to the AVQueuePlayer to be played sequentially... here is my code ...

override func viewDidLoad() {

//fills songNameArray with the appropriate part of file name, example: print(songNameArray[0]) -> prints -> "SongName.mp3"
   let path = NSBundle.mainBundle().resourcePath!
  let songFiles = try! NSFileManager.defaultManager().contentsOfDirectoryAtPath(path)
    for item in songFiles {
        if item.hasSuffix("mp3") {
            songNameArray.append(item)
            print("appended to songNameArray \(item)")
        }
    }

 //iterates thru songNameArray and uses combineStrings method to form fullSongPath//
    for i in 0...songNameArray.count - 1 {
        fullSongPaths.append(combineStrings(songNameArray[i]))
        print("here are the full song paths \(fullSongPaths[i])")
    }

 func combineStrings(songName: String) -> String {
    let fullSongPath = ("/Users/username/Desktop/Xcode Projects Folder/LocalAudioPlayer/LocalAudioPlayer/" + songName)
    return fullSongPath
    }
}

Then, here is my didSelectRowAtIndexPath where a user taps a song to start playing...

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

      makePlayerItemsArray()

      queuePlayer = AVQueuePlayer(items: playerItemsArray)
      queuePlayer?.play()
  }

And here is that makePlayerItemsArray function ...

    func makePlayerItemsArray () {
       playerItemsArray.removeAll()

       var createdURL = NSURL()
       var createdItem = AVPlayerItem(URL: createdURL)

       for i in 0...fullSongPaths.count - 1 {
           createdURL = NSURL.fileURLWithPath(fullSongPaths[i])
           createdItem = AVPlayerItem(URL: createdURL)
           playerItemsArray.append(createdItem)
       }
   }

This all works perfectly on the computer, the audio starts playing almost immediately after tapping a row. The problem is when i run this on my iPhone no audio comes out. The song never starts playing. And, when running on iPhone, if i tap a row-- then wait a few seconds-- then tap a button that calls queuePlayer.currentItem.currentTime(),-- the app crashes on that line, which I believe is due to the queuePlayer not having any item to play.

But why, when I run it on my phone does the queuePlayer not get the items from playerItemsArray?... I am able to print out the contents of the fullSongPaths array as well as the contents of the playerItemsArray but the queuePlayer wont play them...

MikeG
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1 Answers1

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The problem is this line:

let fullSongPath = ("/Users/username/Desktop/Xcode Projects Folder/LocalAudioPlayer/LocalAudioPlayer/" + songName)

You can't play a song file that's on your computer desktop when you're on your phone.

I'm surprised that this worked on the simulator, and the fact that it did could be reasonably considered a bug.

The files need to be in the app bundle itself (so that they are copied onto the phone as part of the app when you build and run it there), and you need to refer to them through their URLs as resources within the app bundle (that is, relative purely to the app bundle, because its URL is unimportant and can change).

matt
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  • Ok thanks for this! I changed my code to `let path = NSBundle.mainBundle().pathsForResourcesOfType("mp3", inDirectory: nil) for i in 0...path.count - 1 { print(path[i]) }` ... which returns an array of Strings, that are the proper path in the bundle on the mobile device leading to the mp3 file which I then use to create `[NSURLs]` which are then used to create `[AVPlayerItems]` which are playable through the AVQueuePlayer – MikeG Jan 19 '16 at 23:04
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    Sounds great. If you use `URLsForResources...` you can skip the path-to-URL conversion, and this would be better. – matt Jan 19 '16 at 23:41