title: dynamically set navigation controller title
body: <p>I'm working with core data, and part of my app is very very similar to the default contacts app. There is an edit screen after a contact is in core data, and I would like to make the title: [insert contact name here] s information". I know I can set the title to just the core data entity attribute by doing: self.navigationController.title = _athletesFullName; (property for attribute under the entity "Athlete"). Is there any way I can do something like </p>
  
  <pre><code>self.navigationController.title = @"%@'s information",_athletesFullName; ?
  </code></pre>