This is an overview of watchOS 2 designed to give you the head start you need to start building! Learn about how to design for the Apple Watch, the different UI components included, how your Apple Watch works together (and independently) with your iOS app, and more!

1. 👋⌚2
@NatashaTheRobot

18. 👋⌚2
• Complications
• Watch Connectivity

19. Complications
it’s complicated 🤔

25. Creating Complications
with ClockKit
WWDC15 Session 209

26. https://github.com/
tryswift/trySwiftApp

28. DO
Repeat Yourself

29. // iOS app
struct Session {
let startTime: NSDate
let endTime: NSDate
let description: String
let location: String
let speaker: Speaker?
}
// Watch App
struct Session {
let startTime: NSDate
let endTime: NSDate
let location: String
let speaker: Speaker?
let index: Int
}

31. DO
Repeat Yourself
but not too much…

32. Watch Connectivity

33. Background Data Transfer

34. • application context

35. • application context
• user info transfer

36. • application context
• user info transfer
• file transfer

37. Interactive Messaging

38. • Immediate Information
Transfer
• Requires reachable
state

39. WCSession

40. // check needed for iOS App Only
if WCSession.isSupported() {
// activate session for both!
let session = WCSession.defaultSession()
session.delegate = self
session.activateSession()
}

41. import WatchConnectivity
class WatchSessionManager: NSObject, WCSessionDelegate {
static let sharedManager = WatchSessionManager()
private override init() {
super.init()
}
private let session: WCSession? =
WCSession.isSupported() ?
WCSession.defaultSession() : nil
// no need for the check on the Watch App:
// private let session = WCSession.defaultSession()
func startSession() {
session?.delegate = self
session?.activateSession()
}

44. Code Sample

45. 👋⌚2
• Complications
• Watch Connectivity

46. Which future will you
build for?