Clean Architecture in Swift apps.

My keynote from IT61 Mobile Meetup. I told about the Clean Architecture by Robert C. Martin (Uncle Bob) and it's application to making Swift apps.

Transcript

1. Clean Architecture in Swift apps Ivan Rublev Mobile meetup 
 Rostov-on-Don
 Dec 2016
2. Model View Controller • Trygve Reenskaug Computerworld. (2015). Trygve Reenskaug. http://www.cw.no/artikkel/rosings-hederspris-til-forsker Hopkins, J.M. (2016). Commodore PET Computer. https://hackaday.io/project/9950-commodore-pet-usb-keyboard
3. Model View Controller • Trygve Reenskaug • ~1979 Computerworld. (2015). Trygve Reenskaug. http://www.cw.no/artikkel/rosings-hederspris-til-forsker Hopkins, J.M. (2016). Commodore PET Computer. https://hackaday.io/project/9950-commodore-pet-usb-keyboard
4. Model View Controller • Trygve Reenskaug • ~1979 • Computerworld. (2015). Trygve Reenskaug. http://www.cw.no/artikkel/rosings-hederspris-til-forsker Hopkins, J.M. (2016). Commodore PET Computer. https://hackaday.io/project/9950-commodore-pet-usb-keyboard
5. Model View Controller … UIViewController Wikimedia Commons. (2015). Swift Logo. https://commons.wikimedia.org/wiki/File:Swift_logo.svg Masilotti, J. (2015). UI Example. http://masilotti.com/ui-testing-cheat-sheet/
6. 3 551 Model View Controller … UIViewController Wikimedia Commons. (2015). Swift Logo. https://commons.wikimedia.org/wiki/File:Swift_logo.svg Masilotti, J. (2015). UI Example. http://masilotti.com/ui-testing-cheat-sheet/
7. 2 367 Model View Controller … UIViewController Wikimedia Commons. (2015). Swift Logo. https://commons.wikimedia.org/wiki/File:Swift_logo.svg Masilotti, J. (2015). UI Example. http://masilotti.com/ui-testing-cheat-sheet/
8. 2 367 Massive View Controller … UIViewController Wikimedia Commons. (2015). Swift Logo. https://commons.wikimedia.org/wiki/File:Swift_logo.svg Masilotti, J. (2015). UI Example. http://masilotti.com/ui-testing-cheat-sheet/
9. Clean Architecture • Robert C. Martin— Uncle Bob. Koss, B. (2009). Robert C. Martin. https://www.flickr.com/photos/koss/3250213001/
10. Clean Architecture • Robert C. Martin— Uncle Bob. • 2012 Koss, B. (2009). Robert C. Martin. https://www.flickr.com/photos/koss/3250213001/
11. Use Case • Data: • <Client-ID> • Priority path: 1. User enters Client-ID and hits the Balance button. 2. System obtains client’s balance value from the database. 3. System shows balance to User. • Exception path: • User enters wrong Client-ID. Check client’s balance
12. Clean Architecture @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController
13. Clean Architecture @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController
14. Clean Architecture @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController
15. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance
16. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance Request
 clientId=7
17. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance Request
 clientId=7
18. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance Request
 clientId=7 Response 1234
19. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance Request
 clientId=7 Response 1234 ViewModel
 “$1.234”
20. Unidirectional Data Flow @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController Balance $1.234 Request
 clientId=7 Response 1234 ViewModel
 “$1.234”
21. Dependencies? @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController
22. Peripherals for Interactor! @protocol DatabaseCRUD @protocol InteractorOutput UIWindow Database output output output Configurator First implementation in Swift by Raymond Law, clean-swift.com Presenter View PresenterOutput Router @protocol InteractorInput Interactor ViewController
23. Demo
24. Code coverage by tests ~76%
25. Clean Architecture Advantages • Most important code is in Interactor that implements the Use Case. • ViewController contains ~200-400 lines. • All code is 100% testable. • Easy to add/change features.
26. Data is passed by routers UIWindow Navigation Controller Router output View Controller output View Controller Router Object UUID Interactor Interactor
27. Links • MVC • heim.ifi.uio.no/~trygver/1979/mvc-2/1979-12- MVC.pdf • Clean Architecture • 8thlight.com/blog/uncle-bob/2012/08/13/the- clean-architecture.html • www.youtube.com/watch?v=o_TH-Y78tt4
28. Thanks! • Clean Templates
 github.com/IvanRublev/CleanTemplates • MyLife2 app
 github.com/IvanRublev/MyLife2 • Ivan Rublev
 ivan@ivanrublev.me