title: slideNavigationController disappeared in iOS7 not iOS8
body: <p>i have used in my application slideViewController cocoa control it's work fine in iOS8 but it's navigation bar become hidden in iOS7 </p>
  
  <p><img src="https://i.stack.imgur.com/dQxLz.png" alt="iOS7"><img src="https://i.stack.imgur.com/o4DK9.png" alt="iOS8"></p>