Time Matters: A WatchKit Story

This is a talk I gave at @SwiftConf 2015. It shows what decisions we made at HRS during the development of our first WATCH extension and why.

Transcript

1. SwiftConf.com Michael Ochs Time Matters: A WatchKit Story
2. SwiftConf.com HRS - Hotel Reservation Service WATCH app in the store on launch day Developed by two engineers Completely written in Swift
3. SwiftConf.com Considerations Concept Implementation
4. SwiftConf.com Considerations
5. SwiftConf.com A watch is about time It has a very small display It is used at a glance
6. SwiftConf.com Notifications Complications - watchOS 2 Glances Watch App
7. SwiftConf.com A watch is about time Information needs to be relevant now Inform about the current or upcoming event Progress further in the timeline on user request Information at a glance
8. SwiftConf.com It has a very small display Show the most important information As little user interaction as possible Handoff is your friend
9. SwiftConf.com It is used at a glance A couple of seconds It is about consuming information
10. SwiftConf.com Concept
11. SwiftConf.com What is the most important feature of the iOS app? Booking a hotel What is the most time relevant feature? When is my next reservation? What is the most important information while on the go? Where is my next reservation?
12. SwiftConf.com Show upcoming bookings Show location relevant information Show time relevant information
13. SwiftConf.com Upcoming bookings Hotel detail hotel name hotel address city hotel on map number of nights hotel phone number arrival date earliest checkin time departure date reception opening time current booking? reception closing time
14. SwiftConf.com Upcoming bookings Hotel detail hotel name hotel address city hotel on map number of nights hotel phone number arrival date earliest checkin time reception opening time reception closing time departure date current booking?
15. SwiftConf.com
16. SwiftConf.com Implementation
17. SwiftConf.com Watch Extension Watch App iOS App Storyboards Code
18. SwiftConf.com Watch Extension Watch App iOS App Storyboards Code watchOS 2
19. SwiftConf.com Watch Extension Business logic Control flow iOS App Long running tasks Network operations
20. SwiftConf.com UI & data communicates asynchronously Extension has no background execution Extension and iOS app have different sandboxes
21. SwiftConf.com Watch Extension Watch App iOS App App Group App Group
22. SwiftConf.com Watch Extension Watch App iOS App watchOS 2 App Group App Group
23. SwiftConf.com Communication between Extension and iOS app WatchConnectivity func updateApplicationContext(_: [String : AnyObject]) -> Void func sendMessage(_: [String : AnyObject],
 replyHandler: (([String : AnyObject]) -> Void)?,
 errorHandler: ((NSError) -> Void)?) -> Void optional func session(_ session: WCSession,
 didReceiveApplicationContext: [String : AnyObject]) -> Void optional func session(_: WCSession,
 didReceiveMessage: [String : AnyObject],
 replyHandler: ([String : AnyObject]) -> Void) -> Void watchOS 2
24. SwiftConf.com Summary
25. SwiftConf.com Time relevant information Information on the go Keep information very condensed As little user interaction as possible Ensure UI is understandable at a glance Keep communication at a minimum
26. SwiftConf.com Michael Ochs @_mochs michael.ochs@hrs.com ios-coding.com Thank you.