AutoLayout setting UILabel height to zero

Question

I have a UILabel for item description amongst other views, all laid out using constraints in Interface Builder - you can see all relevant constraints in the image b

Answer 1

AutoLayout in this UIViewController can't satisfy all the constraints you have set, therefore it dismiss those on your UILabel, resulting in a compressed state. You should have a look at the other constraints in your UIViewController, and set the priority of the height contraint to a higher number.