title: Interface Builder outlets managing
body: <p>I want to create UIViewController subclass that will be container for two other controllers and it has properties</p>
  
  <pre><code>@property (nonatomic, strong) UIViewController *firstController;
  @property (nonatomic, strong) UIViewController *secondController;
  </code></pre>
  
  <p>then i wanted to connect these properties via interface builder to instantiate them automatically. But if i just make them IBOutlets</p>
  
  <pre><code>@property (nonatomic, strong) IBOutlet UIViewController *firstController;
  @property (nonatomic, strong) IBOutlet UIViewController *secondController;
  </code></pre>
  
  <p>i cant connect other controllers. but UINavigationController has property rootViewController and we can connect other controllers in IB. if it's possible to make such trick in custom controllers please help</p>