title: How to convert a NSObject from NSDictionary into NSString?
body: <pre><code>NSObject *url = [item objectForKey:@"link"];
  </code></pre>
  
  <p>This is a <code>NSObject</code> from <code>NSDictionary</code> "item". I need to convert <code>NSObject</code> to <code>NSString</code>.</p>
  
  <p>Because I should use url to string.</p>
  
  <p>How can I do that?</p>
  
  <p>Thank you for replying. </p>