In my app, I tried to use scroll view. But I encountered an issue where the scroll view added space at the top and bottom, as mentioned in the following question.
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The way I solved the extra padding between the top label and the nav bar was by unchecking "Under Top Bars" in the attributes inspector, in the "Extended Edges" section. When you uncheck it, items on your storyboard may move around. Don't re-arrange them. Run simulator and it should work.
Note: leave "Adjust Scroll View Insets" checked, otherwise nothing scrolls.
My attributes: