title: property access result unused - getters should not be used for side effects
body: <p>I am trying to set title of <code>UINavigationController</code> I am using following command  <code>self.title = @"Categories";</code> it works perfectly, But I needs to name it via an array's object, so I used to put following line of code in <code>ViewDidLoad</code> section </p>
  
  <pre><code>self.title =@"%@", currentYouga.yougaName;
  </code></pre>
  
  <p>and it giving error <strong>"property access result unused - getters should not be used for side effects"</strong></p>