title: AVAudioPlayer stops playing the audio when iPhone goes to sleep
body: <p>I need to play a background sound all the time as long as my application is running. I tried to use AVAudioPlayer for this purpose. However, it stops playing the sound as soon as the iPhone goes to sleep mode.</p>
  
  <p>Could you  let me know how can I fix this problem?</p>
  
  <p>Thanks</p>