title: Strange behavior of NavigationBar after multiple push and pop with animation NO. iOS7
body: <p><strong>Problem while multiple pop and push operation performed on UINavigationController programmatically with animation NO. ( iOS7 iPhone Only )</strong></p>
  
  <p><strong>Source Code</strong>
  <a href="https://github.com/abhishek9284/NavigationBarTest" rel="nofollow noreferrer">https://github.com/abhishek9284/NavigationBarTest</a></p>
  
  <p>To understand problem consider following view tree.<br> ( I use UITableViewController in my application )
  <br>Right click and select <em>open image in new tab</em> to see large image.
  <img src="https://i.stack.imgur.com/MmPzN.png" alt="enter image description here"></p>
  
  <p>Bug Info
  <br>Right click and select <em>open image in new tab</em> to see large image.
  <img src="https://i.stack.imgur.com/jqXFq.png" alt="enter image description here"></p>
  
  <p>Bug/Problem occurs while performing following navigations.</p>
  
  <ol>
  <li>Push one by one view manually and <strong>goto D view</strong>. <br> 
  (<strong>PUSH</strong> : Root > Alphabets > A > B > C > D)</li>
  <li>Pop multiple views at once programmatically using popToViewController and <strong>go back to Root view</strong>. <br> 
  (<strong>POP</strong> : Root &lt; Alphabets &lt; A &lt; B &lt; C &lt; D)</li>
  <li>Push programmatically and <strong>goto 2 view</strong>. <br>
  (<strong>PUSH</strong> : Root > Numbers > 1 > 2)</li>
  </ol>
  
  <p>in above step 2 and 3 pop and push done programmatically with animation NO, which makes UINavigationBar back button and title very strange.</p>
  
  <p><strong>NOTE : Above problem occurs only in iOS 7 &amp; work perfectly in iOS 6.</strong></p>