UIScrollView with scaled UIImageView using autolayout

Question

Consider a UIScrollView with a single subview. The subview is an

Answer 1

translatesAutoresizingMaskIntoConstraints is only required when you instantiate the view in the code. If you instantiate it in the IB it's disabled by default

In my opinion the UIImageView should fill the ScrollView. Later I'd try setting the zoom of the scrollview to the value that suits you well so the image can only be panned in one direction