MVVM vs MVP

Presentation for the lightning talk on spikeweek at Freeletics

Transcript

1. MVVM-C vs MVP Aydar Mukhametzyanov Dmytro Khmelenko
4. View Controller Model Model-View-Controller
5. Layout Activity View Controller Model Model-View-Controller
6. View Controller Model Model-View-Controller
7. UIViewController Model View Controller Model-View-Controller
8. Problems with MVC Activity/UIViewController is a “God” class Business logic is mixed with UI Hard to reuse Hard to implement tests
9. Solution Model-View-Presenter Model-View-ViewModel (+Coordinator)
10. View Model (Interactor) Activity Layout Presenter MVP
11. Solution Model-View-Presenter Model-View-ViewModel (+Coordinator)
12. MVVM UIViewController Model View Controller
13. Model ViewModel View UIViewController MVVM
14. Model ViewModel View UIViewController UIView MVVM Navigation?
15. MVVM stack Model ViewModel View Coordinator MVVM-C
16. MVVM stack Coordinator MVVM stack MVVM stack MVVM-C
17. MVVM stack MVVM stack MVVM stack MVVM stack Coordinator Coordinator MVVM-C
18. View Model (Interactor) Activity Layout Presenter MVVM vs MVP Model ViewModel View UIViewController UIView
19. • Provides data to Presenter/ViewModel • Processes data (networking, persistence) Model (Interactor) Responsibilities
20. Responsibilities • Draws UI with provided data • Notifies Presenter/ViewModel about user actions View
21. • Handles user actions from View • Gets data from Model • Updates data in Model • Business logic • Provides updated/processed data to View Presenter/ViewModel Responsibilities ——————————————————— • Communicates with Coordinator
22. • Handle navigation • Build the MVVM stacks Coordinator Responsibilities
23. Same thing, different names?
24. Bindings View ViewModel Owns Observes by Reactive approach
25. Simulate bindings View ViewModel Owns Notifies To be continued… …with Reactive approach?
26. Business logic is decoupled from UI Easy to maintain Easy to test Easy to reuse components MVP/MVVM-C advantages
27. Thank you! Questions