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Marcos Reboucas12,890 Points
Wouldn't be better to use a stackview?
Well I don't know if it's exactly the same thing but I've created this example in 2 minutes in Interface Builder without any line of code using a stackview with 4 UIViews inside, aligning the stackview to the centerX, pining it's top and bottom to the same distance from the top and bottom container margins and giving the 4 UIViews inside the same height and width.
Martin WildfeuerCourses Plus Student 11,071 Points
You could do it in Interface builder. They are doing it in code, though, as an alternative. That's probably why this course is called "Auto Layout in Code" ;). That is a matter of preference, I have fought endless fights with other devs. Either approach has its pros and cons, I will not go into detail here. It's never a bad idea to know the programmatic and IB approach, though. Also keep in mind that
UIStackView is only available in iOS 9 and later. Many apps still support iOS 7, some of them even iOS 6 (yes, I am looking at you, WhatsApp).