title: Implementing pinch/double tap to zoom for a UIImage
body: <p>I am trying to workout how to implement a <code>UIImage</code> that has pinch/double tap to zoom. Is this possible with a standard <code>UIImageView</code>?  </p>
  
  <p>Looking at other questions at documentation it has to be completed with a <code>UIScrollView</code>?  </p>
  
  <p>Source: <a href="https://developer.apple.com/library/ios/documentation/windowsviews/conceptual/UIScrollView_pg/ZoomingByTouch/ZoomingByTouch.html" rel="noreferrer">https://developer.apple.com/library/ios/documentation/windowsviews/conceptual/UIScrollView_pg/ZoomingByTouch/ZoomingByTouch.html</a>  </p>
  
  <p>The issue I see is that the above link suggests using <code>initWithImage</code> on the scrollView, but that is not available? </p>
  
  <p>I am looking to implement an Image that is full screen (no larger), if the image is larger it should scale Aspect to Fit into the full screen. The user can then double tap or Pinch to zoom into the image. What is the correct approach for this?</p>