title: Set NavigationBar background to a solid color
body: <p>Is there any way I can set the background of the Navigation Bar of the <code>UINavigationController</code> to a solid color?  </p>
  
  <p>I know I can change the Tint color, but that still leaves me with the gradient/glass effect.  </p>
  
  <p>Any way I can get rid of that, and just have a plain old solid color?</p>