title: NavigationBar title is coming in black color
body: <p>I am using a <code>UINavigationBar</code> in my app with <code>UITabBar</code>.
  On the first tab, the navigation bar title is coming properly as a white title with the default background color, but on the second tab it's not working in the same way. I'm not using any code to change the title color or the navigation bar's <code>tintColor</code>.</p>
  <p>First view:<br>
  <a href="http://img407.imageshack.us/img407/7192/4go.png" rel="nofollow noreferrer">http://img407.imageshack.us/img407/7192/4go.png</a></p>
  <p>Second View:
  <a href="https://i.stack.imgur.com/5MfPu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5MfPu.png" alt="" /></a></p>
  
  <p>Why is the second view's <code>UINavigationBar</code> title drawn in this black color?</p>