I released my first iOS app in 2008, the year that iPhone changed the world.
Recently, in time for World Cup 2018, I release v3 of the same app.
As I rewrite the app -- from Objective-C to Swift -- it dawned on me how much things have changed.
How much the tools have improved. How different designs and architecture are. How much my code has evolved.
As I look at the code evolving from v1 -> v2 -> v3 (thanks source control), I feel like reading my diary. It tells my story in iOS development.
v1 (2008)
- SVN Source Control (git not popular back then)
- AppDelegate is 1,600+ lines long!
- Code form is inconsistent
- Commented out many code for some reason
- Table view cell are constructed with nibs, then configured with
viewWithTag
- Models are dictionaries and arrays
- 1 month to finish
v2 (2014)
- iOS 6 is a big change with cleaner interface
- Wrote better abstraction
- Replace
Type1ViewController, Type2ViewController, ... etc with OddsViewController, which configure the cell according to the type
- Still Objective-C (no Swift yet)
- Use of Cocoapods libraries
- Use of my own private library
- Storyboard
- Helpful models, but with lots of mutation func
v3 (2018)
- Objective-C to Swift
- Strongly typed language eliminates many crashes. Almost no crash.
- Better namings of everything
- Xcode now can rename methods and types
- Scalable UI
- Auto Layout for any device size or orientation
- Dynamic (Font) Type
- No more storyboard
- All UI created by code with constraints
- Better Architecture
- Clearer responsibilities
- Reasonable dependencies
- MVVM with RxSwift
- Unit Tests with API fixtures
- Fastlane for managing certs, provisioning profiles, building and uploading releases
- 7 days to rewrite
