This is beyond frustrating. I'm having an issue with the UINavigationController (and thus UINavigationBar) pushing my UIScrollView's content down at the top, similar to the issues found here:
iOS 7 -- navigationController is setting the contentInset and ContentOffset of my UIScrollView
IOS7 : UIScrollView offset in UINavigationController
I tried both the recommended solutions of either setting self.automaticallyAdjustsScrollViewInsets = true in my view controller's viewDidLoad() method and deselecting Adjust Scroll View Insets in the Interface Builder. Both solutions remove the margin at the top, but as a few others have noted, I can't scroll anymore.
The UIScrollView and ContentView fill the entire view controller. My content view (inside the UIScrollView) contains labels, segments, and a UITextView at the bottom. Does it have something to do with the content in Content View?
I can attach pictures if needed. Using XCode 7, Swift 2, and iOS 9.
I solved my issue. In auto layout, I wasn't setting my content view's height constraint. Previously, I had pinned the bottom of the content view to the view controller that contained the UIScrollView. I removed that pin and explicitly set the height. It works now.