I have a UIScrollView (actually a UICollectionView, but that probably doesn't matter). When it appears in IOS 7, the navigation controller sets its contentInset and contentOffset to values I don't want. It appears to be trying to adjust for the status bar and the navigation bar. I'd greatly prefer it left them alone. I've fixed this by overriding the getter and setter methods for contentInset and contentOffset, with a flag to tell the object whether or not it should accept a set. But is there a better way?
self.automaticallyAdjustsScrollViewInsets = NO in your main view controller.
This was introduced in
iOS 7 so you might want to wrap that with an iOS version check, if you are supporting
iOS 6 and below.
If you are using storyboards, you can do this in the Interface Builder as well as by checking
'Adjust Scroll View Insets' for your selected controller.