MVVM vs MVP

Transcript

1. MVVM-C vs MVP Aydar Mukhametzyanov Dmytro Khmelenko

2. None
3. None

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