This document summarizes a presentation about integrating Redux into iOS applications. It discusses Redux's unidirectional data flow model, how to integrate it using ReSwift, and conclusions about Redux. The presentation covers introducing Redux and its core concepts like actions, reducers, and state; implementing it with ReSwift by adding a store and connecting views to the store with observers; and concluding that Redux works well for apps with global state, history, or async events but that ReSwift documentation could be improved and the app state can become a "God object".

1. Redux in iOS:
Unidirectional app flow
Viktor Shcherban
iOS Developer @
viktor.shcherban@kaufda.de

2. 1. Intro to Redux and unidirectional flow
2. Integrating Redux into the project
3. Conclusions and recommendations
4. Q&A
15 Feb 2017 Redux in iOS
Agenda

3. Model View Controller
15 Feb 2017 1. intro to Redux and unidirectional flow

4. Redux at a glance
15 Feb 2017 1. intro to Redux and unidirectional flow

5. 15 Feb 2017 1. intro to Redux and unidirectional flow
Redux + details

6. Reducer
ACTION
STATE
PURE*
FUNCTION
reducer
*No side effects,
testable
15 Feb 2017
NEW STATE
1. intro to Redux and unidirectional flow

7. update UI by changing state object
UI = f(state)
Philosophy

8. Time Travel !
15 Feb 2017 1. intro to Redux and unidirectional flow

9. Code Demo
15 Feb 2017 2. integrating Redux (ReSwift)
https://github.com/ReSwift/ReSwift
ReSwift by @benjaminencz

10. SubState
15 Feb 2017 2. integrating Redux (ReSwift)
subState1
Store
subState2
Reducer1
subState1
subState1
View1
View2
Observer
Reducer2

11. Model-View-
Controller
Repository
Service
Provider
Singleton
DB
Network
15 Feb 2017 2. integrating Redux (ReSwift)
App Structure

12. View
Repository
Service
Provider
DB
Network
Redux
15 Feb 2017 2. integrating Redux (ReSwift)
App Structure with Redux

13. • use ReSwift or your own implementation
• don’t keep everything in the AppState
15 Feb 2017 3. Conclusions

14. • unidirectional flow
(readable)
• functional & reactive
(testable)
• good separation of
concern (maintainable)
• compatible with VIPER
15 Feb 2017 3. Conclusions
• ReSwift documentations isn’t
that good
• App State is a God Object

15. When Redux works
• App with lots of global state
• Apps with history of state (such as undo and redo
actions)
• Apps with a number of async events.
• Apps where you need to save navigation state
between sessions.
15 Feb 2017 3. Conclusions

16. Thank you!
Viktor Shcherban
viktor.shcherban@kaufda.de
LinkedIn:
This presentation
on SlideShare:
https://realm.io/news/benji-encz-unidirectional-data-flow-swift/:
https://github.com/ReSwift/ReSwift
Links:
https://reswift.github.io/ReSwift/master/getting-started-guide.html