title: How can I get all registered URL schemas on iPhone?
body: <p>We can start an app with a URL schema such as:</p>
  
  <pre><code>[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto:"]];
   //will start mail application
  </code></pre>
  
  <p>But how can I find out all the registered application URL schema on my iPhone/iPad?</p>