title: ScrollView Zooming problem
body: <p>In TapToZoom sample(apple code), If i pinch(inwards) the image becomes smaller than the window size(If i remove fingers it will fit correctly to window). How to fix the image to the window if the content size of scroll view is less than window size. I spent a day to fix this problem but of no use...
  I am attaching the snap..
  <img src="https://i.stack.imgur.com/C7r1x.png" alt="alt text"></p>
  
  <p>The black color is my window of size(320*480) if i pinch the image has gone smaller than the window size(highlighted image) If i stop pinching at this time It will fit correctly to window. But i don't want my imageView to become smaller than window while pinching how to accomplish this?</p>
  
  <p>Thanks,</p>