The document discusses several tools to help with iOS development including Tweaks, FLEX, Knuff, SwiftFormat, and SwiftLint. Tweaks allows modifying server URLs and other values at runtime. FLEX enables debugging network requests, inspecting views and memory, and modifying user defaults. Knuff simplifies testing push notifications. SwiftFormat formats code to follow style rules. SwiftLint finds and fixes style and quality issues.

1. Less painful iOS development
Samuel Edwin - Tokopedia

2. Tweaks
https://github.com/facebook/tweaks

3. Tweaks - Why?
// NSString *serverUrl = @“ws.tokopedia.com”;
NSString *serverUrl = @”ws-alpha.tokopedia.com”;

4. Tweaks
Server Selection

5. Tweaks
User Onboarding

6. Tweaks
User Onboarding
Always show onboarding: YES

7. Tweaks - Login

8. Tweaks - OTP
Countdown

9. Tweaks - OTP
Countdown
Reduced to 5s

10. Tweaks - Other Usages
- Quick prototyping
- React Native JS bundle configuration

11. Tweaks - Installation
- _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+ _window = [[FBTweakShakeWindow alloc] initWithFrame:[[UIScreen
mainScreen] bounds]];

12. FLEX
https://github.com/flipboard/FLEX

13. FLEX - Network
Debugging

14. FLEX - Network
Debugging
- Request headers
- Request body
- Response headers
- Response body
- cURL request generator

15. FLEX - Find Current
View Controller

16. FLEX - Modify UI
Directly

17. FLEX - Detect
Memory Leaks

18. FLEX - Inspect User
Defaults

19. FLEX - Modify User
Defaults

20. FLEX - Other Usages
- HTTP cookie inspection
- NSLog inspection
- File browser
- Inspect private API

21. FLEX - Installation
pod ‘FLEX’, :configurations => [‘Debug’]
- (void)applicationDidBecomeActive:(UIApplication *)application {
[FLEXManager.sharedManager showExplorer];
}

22. Knuff
https://github.com/KnuffApp/Knuff

23. Knuff - Without
Example: Transaction rejected push notification
- Add to Cart
- Finish payment
- Reject transaction
- Server send push notification payload
- Slow to reproduce

24. Knuff - Much better!
Example: Transaction rejected push notification
- Put payload and device token to Knuff App
- Send push notification
- Super easy to reproduce

25. Knuff - Push Notification Debugging

26. Knuff - Installation (Optional)
pod ‘Knuff’
That’s it!

27. SwiftFormat
https://github.com/nicklockwood/SwiftFormat

28. SwiftFormat

29. Without SwiftFormat

30. SwiftFormat
Much better!

31. No more code style
debate!

32. SwiftFormat - Rules
indent
if x {
- // foo
} else {
- // bar
- }
if x {
+ // foo
} else {
+ // bar
+ }

33. SwiftFormat - Rules
braces
- if x
- {
// foo
}
- else
- {
// bar
}
+ if x {
// foo
}
+ else {
// bar
}

34. SwiftFormat - Rules
consecutiveSpaces
- let foo = 5
+ let foo = 5

35. SwiftFormat - Rules
redundantGet
var foo: Int {
- get {
- return 5
- }
}
var foo: Int {
+ return 5
}

36. SwiftFormat - Rules
redundantParens
- if (foo == true) {}
+ if foo == true {}

37. SwiftFormat - Rules
trailingClosures
- DispatchQueue.main.async(execute: {
// do stuff
- })
+ DispatchQueue.main.async {
// do stuff
+ }

38. SwiftFormat - Installation Options
- brew install SwiftFormat
- pod ‘SwiftFormat/CLI’

39. SwiftFormat - How to Use
- Command line - swiftformat dir
- Xcode editor extension
- Git pre-commit hook

40. SwiftLint
https://github.com/realm/SwiftLint/

41. Defensive
programming

42. SwiftLint - Rules
force_cast
var aControlThatShouldBeAButton: UIView = UIButton()
var thatButton: UIButton = aControlThatShouldBeAButton as! UIButton
error: Force Cast Violation: Force casts should be
avoided. (force_cast)

43. SwiftLint - Rules
force_try
func a() throws {}; try! a()
error: Force Try Violation: Force tries should be avoided.
(force_try)

44. SwifLint - Rules
weak_delegate
protocol CarDelegate {}
class Car {
var delegate: CarDelegate
init(delegate: CarDelegate) {
self.delegate = delegate
}
}
warning: Weak Delegate Violation: Delegates should be weak to avoid
reference cycles. (weak_delegate)

45. Thank You!