The concept of functional lens has become pretty popular in functional programming circles, and there are already good contributions for applying lenses to other, traditionally imperative/OO contexts, like Javascript. Brandon Williams has done an excellent job in introducing lenses to the Swift community, and in showing practical examples when working with something like UIView, a radically OOP construct that an iOS developer has to work with on a daily basis.
The 30 Auto Layout Best Practices will give you a head start on working through quirks in Xcode 9 and strategies that will allow you to work faster and more efficiently.
