The Grand Tour of iOS Architectures

Presented at iOSCon 2017 in London.

Video and more detail here: http://cutting.io/posts/the-grand-tour-of-ios-architectures/

Join Dan on this grand tour and discover the plethora of iOS software architectures popping up, from VIPER, VIP and Clean to Flux, Redux and Reactive. Along the way Dan will highlight the common themes and look at some real case studies, to get to the essence of what architecture is and why you should think about it for your app.

Transcript

1. The Grand Tour of iOS Architectures Dan Cutting Schibsted cutting.io @dcutting
2. The Grand Tour of iOS Architectures Dan Cutting Schibsted cutting.io @dcutting
3. @dcutting
4. @dcutting
5. @dcutting MVC
6. @dcutting
7. @dcutting
8. @dcutting ✓ Read/update views ✓ Convert taps into actions ✓ Decide when to route ✓ Present/dismiss screens ✓ Inject dependencies ✓ Feature logic ✓ Talk to external systems ✓ Parse data ✓ Read/update models ✓ Domain logic ✓ Format data for the view ✓ Respond to other VCs
9. @dcutting ✓ Read/update views ✓ Convert taps into actions ✓ Decide when to route ✓ Present/dismiss screens ✓ Inject dependencies ✓ Feature logic ✓ Talk to external systems ✓ Parse data ✓ Read/update models ✓ Domain logic ✓ Format data for the view ✓ Respond to other VCs
10. @dcutting Alex Proimos (CC BY-NC 2.0) https://www.flickr.com/photos/proimos/4199675334
11. @dcutting Eutouring (CC BY-SA 4.0) https://commons.wikimedia.org/wiki/File:Flying_buttresses_of_the_Notre_Dame.jpg
12. @dcutting Eutouring (CC BY-SA 4.0) https://commons.wikimedia.org/wiki/File:Flying_buttresses_of_the_Notre_Dame.jpg MVP
13. @dcutting
14. @dcutting
15. @dcutting
16. @dcutting Coordinator
17. @dcutting override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "createLocation" { guard let creatorViewController = segue.destination as? CreatorViewController else { return } creatorViewController.delegate = self } }
18. @dcutting
19. @dcutting ✓ Read/update views ✓ Convert taps into actions ✓ Decide when to route ✓ Present/dismiss screens ✓ Inject dependencies ✓ Respond to other VCs ✓ Format data for the view ✓ Feature logic ✓ Domain logic ✓ Read/update models ✓ Talk to external systems ✓ Parse data
20. @dcutting
21. @dcutting
22. @dcutting View Controllers ✓ Read/update views ✓ Convert taps into actions Presenters ✓ Decide when to route ✓ Respond to other modules ✓ Format data for the view Entities ✓ Domain logic Interactors ✓ Feature logic ✓ Read/update models Routers ✓ Present/dismiss screens ✓ Inject dependencies Gateways ✓ Talk to external systems ✓ Parse data
23. @dcutting View Controllers ✓ Read/update views ✓ Convert taps into actions Presenters ✓ Decide when to route ✓ Respond to other modules ✓ Format data for the view Entities ✓ Domain logic Interactors ✓ Feature logic ✓ Read/update models Routers ✓ Present/dismiss screens ✓ Inject dependencies Gateways ✓ Talk to external systems ✓ Parse data
24. @dcutting Robert C. Martin https://8thlight.com/blog/uncle-bob/2012/08/13/the-clean-architecture.html
25. @dcutting
26. @dcutting
27. @dcutting
28. @dcutting
29. @dcutting
30. @dcutting
31. @dcutting
32. @dcutting
33. @dcutting
34. @dcutting 1. Testability
35. @dcutting 1. Testability 2. A place for everything
36. @dcutting 1. Testability 2. A place for everything 1. Philosophical disagreements
37. @dcutting 1. Testability 2. A place for everything 1. Philosophical disagreements 2. Too much boilerplate
38. @dcutting Lines of code 0 225 450 675 900 Number of types 0 3 6 9 12 15 18 MVC VIP
39. @dcutting –Despondent respondent “It was terrible.”
40. @dcutting Back home to Blighty
41. @dcutting Back home to Blighty • Talk to your colleagues
42. @dcutting Back home to Blighty • Talk to your colleagues • Piecemeal refactoring OK!
43. @dcutting Back home to Blighty • Talk to your colleagues • Piecemeal refactoring OK! • Stop extracting when you’re happy with test coverage
44. @dcutting Dan Cutting cutting.io @dcutting github.com/dcutting/GrandTour