[benzoate]

Swift is extremely good at this pattern. I’ve been using this pattern a lot with associated values. You remove any ambiguity in the state of your view controller, and any unhandled state generates a compiler error (so long as you doggedly refuse to implement a default handler).

[kolodny]

Nice, Swift also handles having all the transition changes as well. I wrote a small post about how to do this: https://gist.github.com/kolodny/6fa6aa34a711d36e9de01cec4409...