title: iOS 11 Large Navigation Bar title Objective C?
body: <p>How do I make the navigation bar title the new large version in iOS 11 using objective C? </p>
  
  <p>There are lots of examples in swift but none for objective c.</p>
  
  <p>Apple suggests</p>
  
  <pre><code> @property(nonatomic, readwrite, assign) BOOL prefersLargeTitles;
  </code></pre>
  
  <p>But that is not working.</p>
  
  <p>My code is</p>
  
  <pre><code>[super viewWillAppear:animated];
  [self.navigationController setNavigationBarHidden:NO];
  [self.navigationController.navigationBar setBackgroundImage:[[UINavigationBar appearance] backgroundImageForBarMetrics:UIBarMetricsDefault] forBarMetrics:UIBarMetricsDefault];
  self.navigationController.navigationBar.barStyle=UIBarStyleDefault;
  </code></pre>