AVAudioPlayer not playing audio in Swift

Question

I have this code in a very simple, single view Swift application in my ViewController:

var audioPlayer = AVAudioPlayer()

@IBAction func playMyF         


        

Answer 1

In Swift Coding using Try catch, this issues will solve and play audio for me and my code below,

var playerVal = AVAudioPlayer()

         @IBAction func btnPlayAction(sender: AnyObject) {
                let fileURL: NSURL = NSURL(string: url)!
                    let soundData = NSData(contentsOfURL: fileURL)

                    do {
                        playerVal = try AVAudioPlayer(data: soundData!)
                    }
                    catch {
                        print("Something bad happened. Try catching specific errors to narrow things down",error)
                    }

                    playerVal.delegate = self
                    playerVal.prepareToPlay()

                    playerVal.play()

              }

Answer 2

Here is a working snippet from my swift project. Replace "audiofile" by your file name.

    var audioPlayer = AVAudioPlayer()
    let audioPath = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("audiofile", ofType: "mp3"))
    audioPlayer = AVAudioPlayer(contentsOfURL: audioPath, error: nil)
    audioPlayer.delegate = self
    audioPlayer.prepareToPlay()
    audioPlayer.play()

You can download fully functional Swift Audio Player application source code from here https://github.com/bpolat/Music-Player

Answer 3

I had to declare a global player variable

var player: AVAudioPlayer!

and set it in viewDidLoad

   override func viewDidLoad() {
        super.viewDidLoad()
        player = AVAudioPlayer()
    }

Then I could play the audio file wherever like this:

    func playAudioFile(){
    do {
        if audioFileUrl == nil{
            return 
        }
           try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
           try AVAudioSession.sharedInstance().setActive(true)
           /* The following line is required for the player to work on iOS 11. Change the file type accordingly*/
           player = try AVAudioPlayer(contentsOf: audioFileUrl, fileTypeHint: AVFileType.m4a.rawValue)
           /* iOS 10 and earlier require the following line:
           player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3) */
           guard let player = player else { return }
           player.play()
        print("PLAYING::::: \(audioFileUrl)")
       }
    catch let error {
           print(error.localizedDescription)
       }
}

}

Answer 4

I used the below code in my app and it works. Hope that is helpful.

var audioPlayer: AVAudioPlayer!
if var filePath = NSBundle.mainBundle().pathForResource("audioFile", ofType:"mp3"){

     var filePathUrl = NSURL.fileURLWithPath(filePath)
     audioPlayer = AVAudioPlayer(contentsOfURL: filePathUrl, error: nil)
     audioPlayer.play()
}else {
     println("Path for audio file not found")
}

Answer 5

swift 3.0:

 import UIKit
    import AVFoundation

    class ViewController: UIViewController
    {
        var audioplayer = AVAudioPlayer()

        @IBAction func Play(_ sender: Any)
        {
            audioplayer.play()
        }
        @IBAction func Pause(_ sender: Any)
        {
            if audioplayer.isPlaying
            {
                audioplayer.pause()
            }
            else
            {

            }
        }
        @IBAction func Restart(_ sender: Any)
        {
            if audioplayer.isPlaying
            {
                audioplayer.currentTime = 0
                audioplayer.play()
            }
            else
            {
                audioplayer.play()
            }

        }
        override func viewDidLoad()
        {
            super.viewDidLoad()

            do
            {
                audioplayer = try AVAudioPlayer(contentsOf:URL.init(fileURLWithPath:Bundle.main.path(forResource:"bahubali", ofType: "mp3")!))
                audioplayer.prepareToPlay()

                var audioSession = AVAudioSession.sharedInstance()

                do
                {
                    try audioSession.setCategory(AVAudioSessionCategoryPlayback)
                }

                catch
                {

                }
            }
            catch
            {
                print (error)
            }

        }
     }   

Answer 6

Important that AvPlayer is class member and not in the given function, else it goes out of scope... :)