title: How can I change size of UINavigationBar in UINavigationViewController in iOS 8?
body: <p>What is the proper way to change height of navigation bar?</p>
  
  <p>I need to create custom title in navigation bar, it should contains two UILabels one above other. The Title should be resized to fit those UILabels. </p>
  
  <p>Should I override <code>sizeThatFits</code>: method in my custom TitleView, would other buttons correctly change to fit that size? How can I change a size of NavigationBar? </p>
  
  <p>That is what I need to create using latest SDK features.</p>
  
  <p><img src="https://i.stack.imgur.com/bBONW.png" alt="enter image description here"></p>