How to use one ContainerView to show multiple ViewControllers
问题 My scenario is that right now my app uses 12 ViewControllers. Each one has two ContainerViews which hold the same set of controls (I'll call them control groups) and I show them via segues. So far this is working however, I have to layout and set constraints for the same two ContainerViews 12 times - once for each VC. And if I add another VC, then I have to lay them out again, etc. If I change any part of my layout then I have to modify all 12 again and again - it's not really scalable. It