AVAudioPlayer失败，并显示错误“操作无法完成。 （OSStatus错误2003334207。）”

Question

This is my code sample... for few audio files (mp4 extension) it fails with exception "The operation couldn't be completed. (OSStatus error 2003334207.)" I downloaded container from iPhone and confirmed the file exist on path

do {  

    audioPlayer = try AVAudioPlayer(contentsOf: url)

     //guard let player = player else { return }
     audioPlayer.delegate = self
     audioPlayer.prepareToPlay()
     audioPlayer.play()
     audioPlayer.volume = 1.0

     if timer != nil && timer.isValid {
         timer.invalidate()
         timer = nil
     }

     timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(LynkAudioPlayer.checkPlayTime), userInfo: nil, repeats: true)

} catch let error as NSError {
     print(error.description)
}

Answer 1

Your code looks fine. This error occurs because you are either accessing a file that is not at the specified url or the value is otherwise nil after it returns. Ensure you have a properly formed url for the resource accessed with AVAudioPlayer(contentsOf: url) . The audio data must also be in a format supported by Core Audio. You may want to check if audioPlayer is nil after setting:

audioPlayer = try AVAudioPlayer(contentsOf: url)

if audioPlayer != nil { 
    audioPlayer.delegate = self
    audioPlayer.prepareToPlay()
    audioPlayer.play()
    audioPlayer.volume = 1.0
} else {
    //try to load a different resource?
}