iOS Simulator does not play sound

Question

On XCode 6, everything works well on device, but on simulator, sound is not played.

There is my swift code :

var url =  NSURL(string: "http://my.url.com/sound.mp3")
var data = NSData(contentsOfURL: url!)
// Removed deprecated use of AVAudioSessionDelegate protocol
AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
AVAudioSession.sharedInstance().setActive(true, error: nil)
self.player = AVAudioPlayer(data: data, error: nil)
self.player.prepareToPlay()
self.player.delegate = self
self.player.volume = 1
self.player.play()

There is the log :

ERROR:     98: Error '!obj' trying to fetch default input device's sample rate

ERROR:     100: Error getting audio input device sample rate: '!obj'

WARNING:   230: The input device is 0x0; '(null)'

WARNING:   234: The output device is 0x26; 'AppleHDAEngineOutputDP:3,0,1,1:0:{2D4C-092D-00000000}'

ERROR:     400: error '!obj'

ERROR:     113: * * * NULL AQIONode object

ERROR:     180: EXCEPTION thrown ('!dev'): -

ERROR:     703: Can't make UISound Renderer

ERROR:     >aqsrv> 70: Exception caught in (null) - error -1

ERROR:     180: EXCEPTION thrown ('!dev'): -

ERROR:     >aqsrv> 70: Exception caught in (null) - error -1

Answer 1

I was having this problem, the comment from @Matti Jokipii, helped me a lot.

You need to have a sound input enabled, so your Mac doesn't give you the null exception.
Go To System Preferences > Sound. And Check you have some input connected. If not, you will have to add a microfone, and re-rerun the app.