Presentation from CocoaHeads Tricity meeting on 07.10.2015 about watchOS 2 and it's new features.

1. watchOS 2 - native apps
are coming
Mateusz Klimczak

2. Agenda
! watchOS 2.0 – what’s new?
! App components
! Let’s build a simple app!

3. watchOS 2.0 – what’s new
! Architecture changes
! More access to the hardware
! Storing data in Keychain
! Tetherless Wi-Fi
! New interface objects
! Animations

4. Architecture changes
! All interactions with the watch
app must be communicated
back to the iPhone
! Hence the watch has this
inherent reliance on the iPhone
in order to work
! Apps took a long time to load

5. Architecture changes
! No need to send data back
and forth between the
containing iOS app and the
watch app
! Communication has changed:
Shared App Groups are no
longer available, you need to
use Watch Connectivity
Framework instead

6. Communication
! With Watch Connectivity Framework you can pass files and data back and
forth between the watch and its paired iPhone
! If both apps are running in the foreground, then the communication is live,
otherwise it happens in the background so that the data or files is available
when the receiving app is launched
! WCSession object handles all the communication between the two devices
(accessed through defaultSession singleton object)

7. More access to the Hardware
! Accelerometer
! Microphone
! Heart rate monitor
! Taptic Engine
! Complications
! Digital crown

8. Animations
! In old approach you had to cycle through a pre-generated series of images
(it is still available)
! Now you can animate changes to the following properties
of WKInterfaceObject:
! alpha
! width and height
! vertical and horizontal alignment
! background color
! layout group insets

9. New interface objects
! Movie control
! Picker control
! Alerts and Action Sheets

10. App components
! Notifications
! Glances
! Complications

11. Notifications
! Apple Watch takes full advantage of the existing
interactive notification support on iOS
! If your app supports notification, Apple Watch displays
those notifications at appropriate times
! iOS decides whether to display that notification on the
iPhone or on the Apple Watch
! There are 2 types of notifications: Short-Look and
Long-Look.

12. Short-Look notifications
! The Short-Look interface is a nonscrolling screen that cannot be customized
! The system uses a template to display the app name and icon along with
the title string
! If the user raises their wrist after a slight pause, the Short-Look notification will
transition to the Long-Look notification

13. Long-Look notifications
! The Long-Look interface is a scrollable screen
that displays the notification’s content and
any associated action buttons
! If you do not provide a custom notification
interface, Apple Watch displays a default
interface that includes your app icon, the
title string of the notification and the alert
message

14. Glances
! A glance is a supplemental way for the user to view
important information from your app
! It is separated from your app’s other interface controllers
! No all apps need a glance
! A glance provides immediately relevant information in a
timely manner
! Glances should be quick and easy to read, so user won’t
have to stop and examine it closely
! Glances do not support interactivity – tapping on a
glance automatically launches your WatchKit app

15. Complications
! Complications are small visual elements that
appear on the watch face and convey
important information to the user
! Complication are visible whenever the user
looks at Apple Watch to check the time
! Complications can be updated by:
! Explicitly when you WatchKit extensions is
running
! Ask ClockKit to wake your WatchKit extension at
periodic intervals
! Use push notifications to update your data
! Transfer time-sensitive data from your iOS app

16. Let’s code something!

17. The end
! Thanks for your attention!
! Any questions?