title: Objective-C: How can I detect http URL's in a string?
body: <p>Let's assume I have the string:</p>
  
  <pre><code>"I love visiting http://www.google.com"
  </code></pre>
  
  <p>How can I detect the token, <a href="http://www.google.com">http://www.google.com</a>?</p>