I\'m trying to place a UIImageView at the top of a UIScrollView and when I constrain the UIScrollView to the sides of the View Controller and constrain the UIImageView to th
Check that following constraints are added to your view:
I have created one demo as you described.
Set all constraints for UIScrollView and UIImageView and works perfectly.
Below are reference images for you.

Step - 1 : In storyboard Select UIView -> Editor -> Resolve layout issues

Step - 2 : Repeat same to add constraint

Step - 3 : Select UIScrollView and add constraint from right-bottom corner

Step - 4 : Select UIImageView and add constraint for it.
