Kotlin & Swift

The evolution of mobile Development: You are an android developer trying to become an iOS developer, or you are an iOS developer who is trying to get into the android world. Taking advantage of your current platform and put it in steroids

Transcript

1. KOTLIN & SWIFT THE EVOLUTION OF MOBILE DEVELOPMENT
2. ME CECILIA CASTILLO XOOM @ZEZZI
3. WHAT THIS TALK IS ABOUT? ▸ Languages ▸ Architecture ▸ The Big Picture ▸ Layouts ▸ Why is it interesting? ▸ References
4. WHAT THIS TALK IS NOT ABOUT ? ▸ Application Lifecycle ▸ Networking ▸ Security ▸ Storage ▸ Continuos Integration ▸ Distribution ▸ Soft Skills ▸ Platform specific Frameworks ▸ IDE’s
5. ME JAVA ANDROID IOS SWIFT KOTLIN TIME LEVEL CHECK
6. YOU? JAVA ANDROID IOS SWIFT KOTLIN TIME
7. LANGUAGES THE BASICS
8. TEXT KOTLIN &SWIFT ▸ Similar Philosophy: ▸ Pragmatic ▸ Concise ▸ Safety ▸ Interoperability
9. Swift Android Disclaimer: Both platforms have additional ways of defining and initializing a class
10. Swift Android Disclaimer: Both platforms have additional ways of defining and initializing a class Immutable
11. Swift Android Disclaimer: Both platforms have additional ways of defining and initializing a class Optionals
12. Swift Android Disclaimer: Both platforms have additional ways of defining and initializing a class Initializers
13. Swift Android Disclaimer: Both platforms have additional ways of defining and initializing a class Default Values
14. Swift Android Initialization
15. Swift Android Mutable
16. Swift Android Changing property values
17. Swift Android String Interpolation
18. Swift Android Functions
19. Swift Android Array Definition
20. Swift Android
21. Swift Android Type Inference
22. Swift Android Type Inference
23. Swift Android Type Inference
24. Swift Android Optionals and Null Safety Value Type Reference Type
25. Swift Android Optionals and Null Safety Value Type Reference Type
26. Swift Android Optionals and Null Safety Value Type Reference Type
27. Swift Android Extensions
28. Swift Android Extensions
29. Swift Android Interfaces/Protocols and Default Implementation
30. Swift Android Interfaces/Protocols and Default Implementation
31. Swift Android Interfaces/Protocols and Default Implementation
32. Swift Android Type Casting/ Type Checks
33. Swift Android Type Casting/ Type Checks
34. Swift Android Type Casting/ Type Checks
35. MORE……
36. ARCHITECTURE
37. SHARED ARCHITECTURES ▸ Platform agnostic:MVP, MVVM, Clean Architecture, etc…. ▸ Protocol Oriented Programming
38. BIG PICTURE
39. BIG PICTURE KOTLIN ▸ Statically Typed ▸ Supports Type Inference ▸ Type Checks when compiling ▸ Null Safety (Billion Dollar Mistake) ▸ Supports Object Oriented Programming and some Functional Programming ▸ Statically Typed ▸ Supports Type Inference ▸ Type Checks when compiling ▸ Null Safety ▸ Supports some Functional Programming Encourages Protocol Oriented Programming SWIFT
40. BIG PICTURE KOTLIN ▸ Higher Order Functions ▸ Any and Any? Is similar to Object in java ▸ Lambdas as Parameters and return values ▸ Generics ▸ Higher Order Functions ▸ Any and AnyObject ▸ Closures ▸ Generics SWIFT
41. BIG PICTURE KOTLIN ▸ Immutability is not forces but strongly encouraged ▸ Extensions to add new Functionality ▸ Interoperability with java ▸ Semi automatic conversion Java-> Kotlin ▸ Immutability is not forces but strongly encouraged. ▸ Extensions to add new Functionality ▸ Interoperability with Objective-C ▸ Manual conversion Obj-c ->swift SWIFT ▸ This are some commonalities there are more…
42. LAYOUTS
43. TEXT AUTOLAYOUT VS CONSTRAINT LAYOUT ▸ Similarities: ▸ Precise: Adaptive ▸ Design via GUI ▸ Based on Cassowary Algorithm ▸ Differences: ▸ Default Behavior ▸ Fallback Handling
44. TEXT UISTACKVIEW VS LINEAR LAYOUT ▸ Similarities: ▸ Maintainable ▸ Orientation Control ▸ Graceful Dynamic behaviors ▸ Differences: ▸ Weighting
45. CONSTRAINT LAYOUT VS AUTO LAYOUT
46. CONSTRAINT LAYOUT VS AUTO LAYOUT https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/ debugging_with_xcode/Art/dwx-sw-dvh-1_2x.png
47. CONSTRAINT LAYOUT VS AUTO LAYOUT
48. CONSTRAINT LAYOUT VS AUTO LAYOUT https://www.bignerdranch.com/blog/constraintlayout-vs-auto-layout-how-do-they-compare/
49. WHY IS INTERESTING?
50. CHALLENGES OVER TIME ▸ Challenges 1: • iOS: Obj-C Syntax, Memory Management, Pointers, etc. • Android: Java a language well known to a lot of people, very stable. Lifecycle Management (Activities) was the challenge, Eclipse ▸ Challenges 2: • A new language. Constant changes on the language. Interoperability with Obj-C. • Android: Introduced Fragments, Life Cycle Management, Multiple Device screens. Support for different API’s, Gingerbread. My Perspective
51. CHALLENGES OVER TIME ▸ Challenges 3 • iOS: New programming paradigm: Functional Programming, Protocols and Protocol Oriented Programming, Generics. Constant evolution of the language. Auto Layout. Automatic Reference Counter. • Android: Migration from Eclipse to Android Studio. Maven vs Gradle. More strict patterns to follow in Android. Multiple devices. Gingerbread. ▸ Challenges 4 • iOS: More language changes. Stack Views. • Android: Compatibility with Java 8. Start to consider a more functional approach. Constraint Layout. Both Auto Layout and Constraint Layout are based on Cassowary algorithm. My Perspective
52. CHALLENGES OVER TIME ▸ Challenges 5 • iOS: Breaking changes in the language. Keeping code base up to date. Removing old Obj-C Code • Android: New Language Supported by Google. Will have similar problems that what happened when swift was introduced. (Opportunity to learn from previous experiences.). More opinionated about architecture. My Perspective
53. • Learning Curve in knowing two languages has declined over time • Learning curve in platform specific things is reducing and becoming more opinionated. • Increased Team Collaboration. • We still need to learn the specifics about each platform like lifecycle, best practices, frameworks, threads, permissions. E.g: Core Data, Room. • Similar implementation. • Layouts follow a similar approach. CONCLUSION My Perspective
54. WANT TO BECOME PLATFORM BILINGUAL
55. YOU ARE ANDROID ENGINEER WHO WANT TO BECOME IOS PROFICIENT • Learn Kotlin • Then Learn iOS platform specific things. The language will be easier.
56. YOU ARE IOS ENGINEER WHO WANT TO BECOME ANDROID PROFICIENT • First learn the basics of Kotlin. • Then focus mostly in learning Android Specific things using Kotlin.
57. REFERENCES
58. REFERENCES ▸ https://building.coursera.org/blog/2016/03/16/becoming- bilingual-coursera/ ▸ https://gist.github.com/cbruegg/ d982a4bdc47757633f5355d4f1252d0e#who-is-using-kotlin ▸ https://medium.com/@Pinterest_Engineering/the-case- against-kotlin-2c574cb87953 ▸ http://nilhcem.com/swift-is-like-kotlin/ ▸ https://www.youtube.com/watch?v=_DuGaAkQSnM&t=215s