title: UIScrollView won't scroll!
body: <p>In IB I have my UIView.  Then I have a sub-UIView with a UIScrollView as a sub view.  Then the UIScrollView has a sub-UIImageView.  The UIScrollView and UIImageView are the same size.  They're much bigger than the UIView of which they are subviews.  I assumed this would make scrolling work.  It doesn't.  Is some sort of code required for scroll views to work?</p>