@Hack into the City

Play with watchOS 2.0 by Grady Zhuogradyzhuo@gmail.com

Sample Code

https://goo.gl/oTo8PV

How it Work? (watchOS 1)

WatchKit ExtensionWatchKit UI

iOS App

WatchKit WatchKit

How it Work? (watchOS 1)

WatchKit ExtensionWatchKit UI

iOS App

WatchKit WatchKit

Modified on Architecture

WatchKit ExtensionWatchKit UI

iOS App

Available Hardwares

WatchKit Extension

WatchKit UIDigital Crown

Taptic Engine

Networking

Microphone

Heart Rate Sensor

Accelerometer

Gyroscope

Available System Technologies

WatchKit Extension

WatchKit UI

ClockKitContacts Core Data Core Foundation Core Graphics Core Location Core Motion EventKit Foundation HealthKit

HomeKit ImageIO MapKit Mobile Core Services PassKit Security System Configuration Watch Connectivity WatchKit

Available System Technologies

❖ WatchConnectivity

❖ Complication - ClockKit

❖ Digital Crown - WKInterfacePicker

❖ Haptic - WKInterfaceDevice

❖ MediaPlayer - WKInterfaceController

❖ AudioRecording - WKInterfaceController

How do you get data to the watch App?

WatchConnectivity NSURLSession

WatchConnectivity

The Watch Connectivity framework (WatchConnectivity.framework) provides a two-way communications conduit between an iOS app and a WatchKit app on a paired Apple Watch.

WatchConnectivity

The Watch Connectivity framework (WatchConnectivity.framework) provides a two-way communications conduit between an iOS app and a WatchKit app on a paired Apple Watch.

Setup

if (WCSession.isSupported()) {

let session = WCSession.defaultSession()

session.delegate = self // conforms to WCSessionDelegate

session.activateSession() }

Session State

Session State

paired

Session State

watchAppInstalled

paired

Session State

watchAppInstalled

paired

complicationEnabled

Session State

watchAppInstalled

reachable

paired

complicationEnabled

Session State

watchAppInstalled

reachable

paired

complicationEnabledreachable

3 + 1 Transfer Types❖ Background transfers

• Application context

• User info transfer

• File transfer

❖ Interactive messaging

• Live communication

Background transfers

Background transfers ❖ Content not needed immediately

❖ OS intelligently transfers content

❖ Queue up content

❖ OS transfers content

❖ Sending side can exit

• Pick opportune time

• Delivers on receiver next launch

Background transfers ❖ Content not needed immediately

❖ OS intelligently transfers content

❖ Queue up content

❖ OS transfers content

❖ Sending side can exit

• Pick opportune time

• Delivers on receiver next launch

Recommended

3 + 1 Transfer Types❖

• Application context

• User info transfer

• File transfer

❖ Interactive messaging

• Live communication

Background transfers

Application context ❖ Most interesting/relevant content

❖ Overriding behavior

❖ Dictionary

❖ Property list types

❖ Recommended use cases

• Many Apple Watch apps

• Glances

applicationContext receivedApplicationContext

applicationContext receivedApplicationContext

iOS App

iOS App

applicationContext receivedApplicationContext

A

update

iOS App

applicationContext receivedApplicationContext

A

B

update

A

applicationContext

B

iOS App

receivedApplicationContext

B A

applicationContext

B

iOS App

receivedApplicationContext

BB

Watch Extension

applicationContext

B

iOS App

receivedApplicationContext

B

Current B

B

User info transfer

❖ Queue user infos (dictionaries)

❖ Property list types(String, Number, Array, Dictionary…)

❖ In memory content

❖ Access to outstanding content in queue

Background Queue Outstanding User Info Transfers

Background Queue Outstanding User Info Transfers

Watch Game

Background Queue Outstanding User Info Transfers

L1

Background Queue Outstanding User Info Transfers

L1

L2

Background Queue Outstanding User Info Transfers

L1 L2

L3

Background Queue Outstanding User Info Transfers

L1 L2 L3

iOS Game

Background Queue Outstanding User Info Transfers

L1 L2 L3

L1

didReceiveUserInfo

iOS Game

didReceiveUserInfo

Background Queue Outstanding User Info Transfers

L2 L3

L1L2

Background Queue Outstanding User Info Transfers

L3

iOS Game

L1L2

L3

didReceiveUserInfo

File transfer

❖ Very similar to user info transfer

❖ Queue files

❖ Access to outstanding content in queue

❖ Additional metadata

❖ Small

• Property list types

Outstanding File Transfers ~/Documents/Inbox/

Outstanding File Transfers ~/Documents/Inbox/

iOS App

A

Outstanding File Transfers ~/Documents/Inbox/

iOS App

B

A

Outstanding File Transfers ~/Documents/Inbox/

iOS App

A B

C

Outstanding File Transfers ~/Documents/Inbox/

iOS App

A B C

Outstanding File Transfers ~/Documents/Inbox/

iOS App

A B C

Watch Extension

Outstanding File Transfers ~/Documents/Inbox/

iOS App

A B C

didReceiveFile

A

Outstanding File Transfers ~/Documents/Inbox/

iOS App

B C

didReceiveFile

A

B

Outstanding File Transfers ~/Documents/Inbox/

iOS App

C

didReceiveFile

A

B

C

Live communication

❖ Devices connected Watch

❖ Check reachable == true

❖ Small

• Property list types

iOS App

session.reachable == trueWatch

Extension

iOS App

session.reachable == true

sendMessage:

Watch Extension

A

iOS App

session.reachable == trueWatch

ExtensionR

iOS App

session.reachable == trueWatch

Extension

replyHandler()

R

Live communication func sendMessage( message: [String : AnyObject], replyHandler: (([String : AnyObject]) -> Void)?, errorHandler: ((NSError) -> Void)?)

optional func session( session: WCSession, didReceiveMessageData messageData: NSData, replyHandler: (NSData) -> Void)

On Receiver side (by delegate)

On Sender Side

Clock Face

Clock Face

Complication

Complication Families

CLKComplicationTemplate

CLKComplicationTemplate ModularLargeStandardBody

class CLKComplicationTemplateModularLargeStandardBody : CLKComplicationTemplate { var headerTextProvider : CLKTextProvider var body1TextProvider : CLKTextProvider var body2TextProvider : CLKTextProvider? var headerImageProvider : CLKImageProvider?}

CLKComplicationDataSource

CLKComplicationServer

Reload

Timeline

WatchKit Extension

Time Travel

Timeline9:00

Lunch!12:00 PM

12:00

Coffee!1:30 PM

1:30

Dinner!6:30 PM

Timeline Entry9:00

Lunch!12:00 PM

Timeline Entry12:00

Coffee!1:30 PM

Timeline Entry1:30

Dinner!6:30 PM

9:00 12:00 1:00 2:00

Time Travel

Configure

Configure

Summary❖ Extension has been moved to on Watch.

❖ All the most hardware API on the Watch can be used.

❖ Connect with iOS App by WatchConnectivity.

❖ Complications can be provided by Watch App.

❖ Almost all CocoaTouch frameworks are supported.

❖ Now you can play Taptic Engine.

❖ Digital Crown can be used on Simulator.

Thanks for your attention