New Life for Your Product

There is bunch of legacy code in most of the products which we are trying to improve the flexibility and reliability. However,

* How could we hanld with bugs or features and refactor the legacy code at the same time?
* How could we take the advantage of the moden language Swift and inject into Objective-C code?
* How could we turn the Massive-View-Controller chaos into Clean Architecture?

Therefore, for those developers who want to be in a higher level or try to refactor their legacy code of the product.
I will share my real-life experience and answer those questions.

Transcript

1. New Life for Your Product @marslin_dev
2. Self-Introduction Cheng-Lung Lin A front-end team leader and an iOS developer • Twitter: @marslin_dev
3. Self-Introduction Cheng-Lung Lin A front-end team leader and an iOS developer • Twitter: @marslin_dev
4. Agenda
5. • Annoying hybrid codebase • The best architecture • Apply to product
6. Annoying Hybrid Codebase
7. New Programming Language
8. Copyright © 2000-2019 JetBrains s.r.o.
10. Powerful Swift • Generics • Enumeration with associated values • Structures / tuples • Typealiases • Nested types • so on
11. Objective-C into Swift
12. Swift into Objective-C
13. Weak Swift • Enumeration with associated values • Structures / tuples • Typealiases • Nested types • so on
14. Objc Virus
15. Objc Virus
16. Objc Virus @objc @objc
17. Build up the Adapter
18. @objc Swift A Swift B Objc C
19. Swift A Swift B Objc C
20. Swift A Swift B Objc C @objc Swift D
21. Promise <Swift> AnyPromise @objc __AnyPromise
22. What Architecture?
23. The Popular Architectures
24. MVX • MVP • MVVM • VIPER • VIP • etc.
25. Reference • Nelson：漫談 iOS 架構：MVC / MVVM / VIPER 與 Redux • 黃惠勤：從 MVC 到 MVVM，再到 MVVMC 的開發經驗分 享
26. The Clean Architecture
27. –Uncle Bob “Clean architecture is an attempt to integrate all of these architectures into a single actionable idea”
29. Policies Mechanisms
31. Infected
32. –Caio Zullo “None of those acronyms can be considered an architecture but just UI design pattern”
33. MVX: Objc
34. MVX: Objc Adapter
35. MVX: Objc Adapter Core: Swift
36. MVX: Objc Adapter Core: Swift
37. MVX: Objc Adapter Core: Swift MVC MVP MVVM VIPER VIP
38. Apply to Product
39. An app is Full of Pages
40. Objc Objc Swift Swift
41. MVP MVC MVVM VIP
42. Navigate within the Pages
45. Objc Objc Swift Swift Push Push Present
46. Objc Objc Swift Swift Push Push Present
47. Coordinator Pattern
48. Soroush Khanlou
49. VC VC Coordinator A Coordinator B
50. Objc Swift Coordinator A Coordinator B
51. Reusable Views
52. Componentization Architecture
53. The Goal Is • Testability • Reusability • Maintainability • Extensibility
54. Componentization Architectural Pattern • MVP • Presenter uses an interface to call view • Presenter manages the state of the view • MVI • View fires “Intent” events
55. Implementation Problems • A UI Component (view) = a MVP • Handle “intent” events
56. 1. Child View Controller
58. Reference • d_date: Integrate your app to modern world
59. 2. NotificationCenter
60. View NotificationCenter Presenter Event Event
61. Summary
62. <Swift> <Objective-C>
63. Pure Swift <Swift> <Objective-C>
64. Pure Swift <Swift> <Objective-C> @objc Swift Adapter
65. MVX: Objc Adapter Core: Swift MVC MVP MVVM VIPER VIP
66. MVX: Objc Adapter Core: Swift SwiftUI
67. Objc Swift Coordinator A Coordinator B
68. Adapter [Objective-C] [Swift]
70. –Mars “The adapters and isolation will bring your product a new life.”
71. –Mars “The reference sessions will make your session easier.”
72. References
73. Coordinator • The Coordinator
 http://khanlou.com/2015/01/the-coordinator • How to use the coordinator pattern in iOS apps
 https://www.hackingwithswift.com/articles/71/how-to-use- the-coordinator-pattern-in-ios-apps • Advanced coordinators in iOS
 https://www.hackingwithswift.com/articles/175/advanced- coordinator-pattern-tutorial-ios • MVVMC-SplitViewController
 https://github.com/mgacy/MVVMC-SplitViewController
74. UI Component • droidcon NYC 2018 - Netflix's componentization architecture with RxJava + Kotlin • part I
 https://www.youtube.com/watch?v=dS9gho9Rxn4 • part II
 https://www.youtube.com/watch?v=1cWwfh_5ZQs • sample code
 https://github.com/julianomoraes/componentizationArch • John Sundell - Building component driven UIs (Mobile Era 2016)
 https://vimeo.com/190713343 • Child View Controllers
 https://www.swiftbysundell.com/basics/child-view-controllers/
75. Clean Architecture • Uncle Bob - The Clean Architecture
 https://blog.cleancoder.com/uncle-bob/2012/08/13/the- clean-architecture.html • Essential Developer - Clean iOS Architecture
 https://www.youtube.com/playlist? list=PLyjgjmI1UzlSWtjAMPOt03L7InkCRlGzb • iOS-Clean-Architecture-Example
 https://github.com/frankvalbuena/iOS-Clean- Architecture-Example
76. Statistics • https://www.jetbrains.com/research/devecosystem-2018/ swift-objc/ • https://dzone.com/articles/swift-vs-objective-c-7- benefits-of-swift-developme
77. Q & A Twitter: @marslin_dev