title: iOS: CFTypeRef disallowed with ARC
body: <p>I'd like get username/password out of my keychain. for this I followed this guide:</p>
  
  <p><a href="http://useyourloaf.com/blog/2010/3/29/simple-iphone-keychain-access.html" rel="noreferrer">Simple iPhone Keychain Access</a></p>
  
  <p>But this part is not allowed with ARC:</p>
  
  <pre><code>NSData *result = nil;    
  OSStatus status = SecItemCopyMatching(
                    (CFDictionaryRef)searchDictionary,                                            
                    (CFTypeRef *)&amp;result);
  </code></pre>
  
  <p>What can I do?</p>