Reverse Engineering UI

Talk given 16 Mar 2016 at the Paris Swift Meetup.

No one has a monopoly on great ideas and copying things well can be as much of an art form as creating them from scratch. Using a set of simple techniques and tools, we as iOS developers can learn from the best, propagate great concepts and exercise our creativity. In the talk I also share some of the reverse engineering challenges I faced when creating PeekPop, a framework that reimplements Apple's peek and pop 3DTouch interaction in older devices.

Transcript

1. REVERSE ENGINEERING
2. LOOK INVESTIGATE REBUILD
3. WHY?
5. “We’ve been shameless about stealing great ideas”
6. SHERLOCKED
8. HOW?
11. SECRET ZIP
15. https://github.com/steventroughtonsmith/cartool
16. Framework modules!
17. class-dump http://stevenygard.com/projects/ class-dump/
19. JAILBREAK?
20. PIRATE APP STORES
21. $ class-dump Instagram -H -o ~/Desktop/ Instagram/
23. https://mitmproxy.org
24. Example
27. Backwards- compatible
29. viewController.registerForPreviewingWithDelegate(self, sourceView: sourceView) func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? func previewingContext(previewingContext: UIViewControllerPreviewing, commitViewController viewControllerToCommit: UIViewController) peekPop = PeekPop(viewController: self) peekPop?.registerForPreviewingWithDelegate(self, sourceView: collectionView!) func previewingContext(previewingContext: PreviewingContext, viewControllerForLocation location: CGPoint) -> UIViewController? func previewingContext(previewingContext: PreviewingContext, commitViewController viewControllerToCommit: UIViewController)
30. if 6S -> Apple else -> custom
31. Fake ForceTouch
32. New sensor
33. UITouch var force: CGFloat var maximumPossibleForce: CGFloat
34. 6.6667?
35. Pressure on devices without the sensor?
37. Accelerometer app on iPad, prints out the reading. Nothing.
39. touch.density = IOHIDEventGetFloatValue((__IOHIDEvent *)children[0], (IOHIDEventField)kIOHIDEventFieldDigitizerDensity); touch.radius = IOHIDEventGetFloatValue((__IOHIDEvent *)children[0], (IOHIDEventField)kIOHIDEventFieldDigitizerMajorRadius); touch.quality = IOHIDEventGetFloatValue((__IOHIDEvent *)children[0], (IOHIDEventField)kIOHIDEventFieldDigitizerQuality);
40. No density or quality on UITouch but… MajorRadius
41. Significant change in major radius -> Pressure
43. Record directly from device
44. 1 2 3
45. Relationship between Force and Peek & Pop?
46. force/maximumPossibleForce Step 1 - 0.33 Step 2 - 0.66 Step 3 - ~0.9
47. Magic values
48. CADisplayLink
50. github.com/ marmelroy/ peekPop
52. @marmelroy