Unified UIViewController “became frontmost” detection?

Question

In my mind, these situations are all parallel:

• My view controller presented another view controller fullscreen, which has now been dismissed

Answer 1

One solution could be to take the Coordinator approach like in a MVVM-C style architecture. You never directly change view hierarchy in a VC but always call into the Coordinator to do it for you. coordinator.showDetails(...)

Additionally you define a viewDidBecomeForemost method in your VCs that the coordinator can invoke when returning to a VC.