title: iPhone: programmatically check if vibration is enabled
body: <p>Is it possible to programmatically check if the system option of iPhone</p>
  
  <pre><code>Settings -&gt; Sounds -&gt; Vibrate on Ring
  </code></pre>
  
  <p>is enabled?</p>
  
  <p>In my app, I would like to display an alert to the user if that option is disabled.</p>