title: iOS5 @property changes
body: <p>In iOS 5, "retain" and "release" are not supported any more. Instead "strong" and "weak" are the new way.</p>
  
  <p><strong>iOS 4 code:</strong></p>
  
  <pre><code>@property(nonatomic, retain)
  @property(nonatomic, assign)
  </code></pre>
  
  <p><strong>iOS 5 code:</strong></p>
  
  <pre><code>???
  ???
  </code></pre>