title: Xcode attribute on property does not match the property inherited from 'UIViewController'
body: <p>Updating an old project for Xcode 7, and I'm getting an error I didn't get before the update.</p>
  
  <p>.h file:</p>
  
  <pre><code>@interface TableRowViewController : UITableViewController {
      UIImage *rowImage;
      NSString *nibName;
  }
  @property (nonatomic, strong) UIImage *rowImage;
  @property (nonatomic, strong) NSString *nibName; // &lt;-- error here
  @end
  </code></pre>
  
  <p>throws error:</p>
  
  <blockquote>
    <p>'copy' attribute on property 'nibName' does not match the property inherited from 'UIViewController'</p>
  </blockquote>
  
  <p>.m file:</p>
  
  <pre><code>#import "TableRowViewController.h"
  
  @implementation TableRowViewController
  
  @synthesize rowImage;
  @synthesize nibName;
  
  @end
  </code></pre>