title: Why does my back button not work on iOS 7?
body: <pre><code>self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonTapped)];
  </code></pre>
  
  <p>That's the code I'm using. When I tap the back button, the <code>backButtonTapped</code> method never gets called (I put a breakpoint on it) and I can command-click the <code>backButtonTapped</code> text to jump to that method, so I know it's there.</p>
  
  <p>However, if I set it to <code>leftBarButtonItem</code>, no button shows up, but tapping that area brings me back.</p>