WWDC 2019 Thoughts and Takeaways

JJ Lin (LINE Taiwan)
Presentation at LINE x iOS@Taipei , WWDC recap
https://iostaipei.kktix.cc/events/linexiostaipei

Transcript

1. WWDC Thoughts and Takeaways JJ Lin, LINE iOS Developer #iOS@Taipei #LINE #WWDC2019
3. WWDC 2019 • June 3-7 • San Jose, California • Sessions • Technology Labs • App Store Labs • Pro Studio
6. UIView-Encapsulated-Layout-Height Conflict constraints
7. estimatedItemSize Image Source: WWDC 2016
8. estimatedItemSize Image Source: WWDC 2016
9. estimatedItemSize Image Source: WWDC 2016
10. UICollectionViewFlowLayoutAutomaticSize Image Source: WWDC 2016
11. Solution • Make one constraint breakable, with lower priority (999) • Use UICollectionView CompositionalLayout (iOS13+)
12. UIKit deprecated after SwiftUI released? of course not
13. UITableView -> List UICollectionView -> HStack / VStack ? UICollectionView CompositionalLayout UICollectionView DiffableDataSource
14. CompositionalLayout • Orthogonal Scrolling • FlowLayout • CollectionView in collectionView • Difficult to reuse • CompositionalLayout • Reusable orthogonal section! • section.orthogonalScrollingBehavior = .continuous Image Source: WWDC 2019
15. CompositionalLayout LayoutDimension • absolute • estimated ◦ might still meet UIView-Encapsulated-Layout conflict, or AutoresizingMaskLayoutConstraint conflict on CollectionLayoutGroup ◦ need to set cell constraint breakable, with lower priority (999) • fractional ◦ auto resize after rotation / bound change
16. DiffableDataSource performBatchUpdates() apply()
17. DiffableDataSource Snapshots Truth of UI state Unique identifiers for sections and items No more IndexPaths Source: WWDC 2019
18. Demo Source: WWDC 2019
19. References WWDC 2016: What's New in UICollectionView in iOS 10 WWDC 2018: A Tour of UICollectionView WWDC 2019: Advances in Collection View Layout WWDC 2019: Advances in UI Data Sources
20. Pro Studio
22. Image Source: WWDC App
23. Mac Pro Interior System in AR
24. 8K Video Editing
25. Hundreds tracks processing Image Source: WWDC App
26. Pro Display XDR
27. Reality Composer Create/Edit AR on Mac Play on iPad
28. Reality Composer Create/Edit AR on iPad
29. ARKit 3 People Occlusion
30. One more thing...
31. We are Hiring! iOS Developer Android Developer QA / Automation Engineer Front-end Engineer Back-end Engineer Data Engineers Security Engineer Developer Relations More Info: https://career.linecorp.com https://lin.ee/dL8kXg
32. Thank you