The document summarizes the main differences and new features between watchOS 1 and watchOS 2. Some of the key changes include updates to app lifecycles, notification handling, data management, and device communication. New features include support for additional frameworks like Networking and CoreGraphics, and new UI elements like pickers, media playback, alerts and complications. The Watch Connectivity framework allows for improved communication between the Apple Watch and iPhone.

1. Apple Watch (part 2)
road to watch OS 2
Alex Rudyak (@alesanro). *instinctools, Hrodna, 2015

2. Contents
● Main differences
● New features

3. Main differences
- changes in app life-cycle
- updating notifications
- data management
- device communications

4. Changes in life-cycle
Extension Delegate

5. Updating notifications
Global and local notifications - handling in
Extension Delegate
Handling depends on if you work with Watch
App or not

6. Data Management
- data placement (“Documents” and “Cache”)
- manual backups
- no integrity with iCloud
- media files

7. Device communication
Watch Connectivity Framework
Basic definition - session (WCSession)

8. Device communication
- update application context (glances)
- user information (complications)
- file transfering
- interactive messaging

9. New features
- availability of new frameworks
(NSULRSession, CoreGraphic and so on)
- UI elements (pickers, movie and audio,
alerts and action sheets)
- keychain availability
- opening external url
- complications

10. Frameworks
Network: Now device can perform own
network requests without help of the phone
device.
Graphics: CoreGraphics availability

11. UI elements - pickers
Just like any other picker presents list of
items +
- navigation with Digital Crown
- coordinate with animations

12. UI elements - movie and audio
WKMovieObject
- playing audio-only, video-only, video +
audio
- record audio

13. UI elements - alerts
Present user-related information
presentAlertControllerWithTitle:message:preferredStyle:actions:

14. Keychain
● SecItemAdd,
● SecItemUpdate,
● SecItemDelete,
● SecItemCopyMatching
use kSecAttrAccessibleWhenUnlocked attribute

15. External URLs
- telephone numbers (tel:)
- texts (sms:)
[[WKExtension sharedExtension] openSystemURL:]

16. Complications

17. Complications

18. Complications
ClockKit framework
Object which implements CLKComplicationDataSource

19. Complications: why shouldn’t use it
● Can you fit your data into the available complication
templates
● Do you already use notifications to convey timely information
to the user
● How much data can you provide in advance

20. Usefull links
1. https://developer.apple.com/library/prerelease/watchos/navigation/
2. https://developer.apple.
com/library/prerelease/watchos/documentation/General/Conceptual/Apple
Watch2TransitionGuide/index.html#//apple_ref/doc/uid/TP40015234
3. https://www.slideshare.net/secret/Kpxw2CAIzaVxRD

21. Thanks for attention!