UIScrollView AutoLayout Vertical Only

You can do this entirely using constraints and it's really easy.

The UIScrollView just needs to understand how much width and space it has inside it. So it needs to have something pinned to the Leading, Trailing, Top & Bottom constraints. Also the width and height of the content needs to be fixed (this does not mean I have to specificy it. I can still use constraints to achieve this.)

1. Add a UIScrollView and position as required.
2. Add a UIView inside the UIScrollView for the content.
3. Set the Leading, Trailing, Top & Bottom constraints of the content UIView to be 0.
4. Add an Equal Width constraint to the UIScrollView and UIView. This will make it vertically scrolling only.
5. You now need to set the height of the content UIView. You can then either specify the height of the content view (blech) or use the height of the controls contained within by making sure the bottom control is constrained to the bottom of the content view.

I did this and it worked a treat.

For disabling the horizontal scroll, you can set the content size in the (void)scrollViewDidScroll method.

[self.scrollView setContentOffset: CGPointMake(0, self.scrollView.contentOffset.y)];

You'll also want to set the directional lock so only 1 scroll direction is used at a time. https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIScrollView_Class/index.html#//apple_ref/occ/instp/UIScrollView/directionalLockEnabled

self.scrollView.directionalLockEnabled = YES;