title: why storyboard ui elements not showing on UIViewController in xcode 6?
body: <p>I am new to IOS development. I am developing an app for IOS 8 devices. I used storyboard for my design yesterday my storyboard showing all UI design but today morning it show blank UIViewController no UI element vision please see in screen shot and very strange thing is that when i run my app all ui element visible in my device. I google but dont find any solution please help me out. Thank you in advance.</p>
  
  <p><img src="https://i.stack.imgur.com/eMT40.png" alt="enter image description here"></p>