title: Cropping image same as updated version of Instagram
body: <p>I want to crop image in my application same as updated Instagram.
  I have create one demo for it. 
  But i got 1 issue in this demo.
  Issue is that, when i zoomIn image and then try to zoom out little bit that time UIImageview zooming out full. Please check demo u got my point which i try to explain
  <strong>This is my demo link 
  <a href="https://drive.google.com/file/d/0Bw367uJS6w22OTNwTmdCNW5Ta3M/view?usp=sharing" rel="nofollow">https://drive.google.com/file/d/0Bw367uJS6w22OTNwTmdCNW5Ta3M/view?usp=sharing</a></strong></p>