title: Choose custom sound for local notifications
body: <p>How do you change the sound that plays for local notifications? I use the code below to play the default sound:</p>
  
  <pre><code>notif.soundName = UILocalNotificationDefaultSoundName;
  </code></pre>
  
  <p>So, I tried this below, and it didn't work. What should I do? Thanks for your help!</p>
  
  <pre><code>notif.soundName = @"sound.caf";
  </code></pre>