title: @property (weak, nonatomic) or @property (nonatomic, weak)? Which one closest to Apple guidelines?
body: <p>If I look at UIViewController.h, I can see <strong>atomicity before retainability</strong>:</p>
  
  <pre><code>@property(nullable, nonatomic, readonly, strong) NSBundle *nibBundle;
  </code></pre>
  
  <p>As if I drag an drop an element from a .xib to a counterpart file, it generates <strong>retainability before atomicity</strong>:</p>
  
  <pre><code>@property (weak, nonatomic) IBOutlet UIView *testView;
  </code></pre>
  
  <p>Source: Xcode 7 beta 5.</p>
  
  <p>Which one is recommended or following Apple guidelines more closely?</p>