TouchVisualizer presentation at potatotips #17 held in Wantedly, Inc on May 13th 2015. TouchVisualizer is a lightweight touch visualization library for iOS written in Swift. https://github.com/morizotter/TouchVisualizer

1. Visualize your touches
TouchVisualizer
potatotips#17

2. tw: morizotter
github: morizotter
https://www.wantedly.com/users/1208490
Love travelling and Sento.

3. Hobby: Github work and translation

4. Want to visualize
touches
at the presentation.

5. Easily.
At once.

6. Because it is
secondary task.

7. It’s just one line!

8. Optional

9. DEMO
https://www.youtube.com/watch?v=7IQ8H9rbJp8

10. Cocoapods & Carthage
morizotter/TouchVisualizer

12. Multiple fingers supported.
Multiple UIWindows supported.
Shows touch radius.
Shows touch duration.
Change colors and images of finger
points.

13. How it works

14. Event dispatching
T
1
T
2
T
3
T
1
T
T1 T1 T
T2 T2 T2 T2
T3 T3
T2
T3 T3 T
UIWindow
View
Event
Same instance

15. Code

16. Method Swizzling

17. Method Swizzling
Swizzle only once
1
2

18. Method Swizzling
Injection

19. Same UITouch object is
coming from one finger.
Event Handling

20. NSRunLoopCommonModes
http://stackoverflow.com/a/4136988/1245142
NSRunLoopCommonModes includes
both the default and event tracking
modes

21. End