WatchKit 初探

WATCHKIT 初探 Apple Watch 的概念與溝通實作

By Grady Zhuo

先來載⼀一下DEMOhttps://github.com/gradyzhuo/WatchKitDemo

https://github.com/gradyzhuo/GZNotificationCenter

WATCH APP的⾓角⾊色

Watch apps extend the behavior of existing iOS apps. The Watch app and WatchKit extension are bundled together.

from WATCHKIT TIPS FOR DEVELOPERS

WATCH APP類似WEB中CLIENT的⾓角⾊色

WATCH APP可獨⽴立運作嗎？現在不⾏行，⾼高度依賴IPHONE

需要藍⽛牙技術背景嗎？不需要，已經被 WATCHKIT 封裝了

可以使⽤用藍⽛牙技術嗎？不⾏行，可能只能抓到基本的藍⽛牙資訊

可以存取WATCH上的SENSORS嗎？

無法，但可能可以透過HEALTHKIT取得⼼心跳率的資料

LAUNCHING A WATCHKIT APP

Load initial interface controller Initialize UI Display UI

Storyboard

Launch WatchKit App

Interface Controller

willActivate

awakeWithContext:

init

WatchKit Extension

The life cycle of an interface controller

Display UI User interacts with UI

User stops interacting

Interface Controller

willActivate didDeactivateVarious action methods

WatchKit Extension

Suspendextension

HOW IT WORK

HOW IT WORK

iOS App Bundle

WatchKit Extension

Code

Resource

WatchKit WatchKit

WatchKit App

Storyboard

Resource

HOW IT WORK

iOS App Bundle

WatchKit Extension

Code

Resource

WatchKit WatchKit

WatchKit App

Storyboard

Resource

HOW IT WORK

iOS App Bundle

WatchKit Extension

Code

Resource

WatchKit WatchKit

WatchKit App

Storyboard

Resource

Controller

ModalView

讓 IOS 與 WATCH 對話

APPLE的⽅方案• class func openParentApplication(userInfo: [NSObject : AnyObject], reply: (([NSObject :

AnyObject]!, NSError!) -> Void)?) -> Bool

openParentApplication:reply:

reply:

背景模式喚醒App

application:handleWatchKitExtensionRequest:reply:

reply([“ShowText”: “Hello”])

• func application(application: UIApplication, handleWatchKitExtensionRequest userInfo: [NSObject : AnyObject]?, reply: (([NSObject : AnyObject]!) -> Void)!)

這是從WATCH APP主動呼叫那 IOS 可以主動控制嗎？

NO

確切來說是APPLE沒有在WATCHKIT中提供

What!

以前⽤用過的技巧• NSNotificationCenter

• 不可⾏行，這只在同⼀一 App 內有效，對App-Extension無效

• KVO(Key-Value-Observer)

• 不可⾏行，同上，這也無法使⽤用在⾮非同⼀一App下的物件

• Hand Off

• 可⾏行，但可能會不夠即時，也算Apple的⽅方案之⼀一。

向底層借東⻄西⽤用⽤用CFNotificationCenter

CFNotificationCenter• 這是⼀一個系統級的實作，與NSNotificationCenter ⽤用途⼀一樣，只是層級更低。

• 可使App與Extension間進⾏行通知。

• 使⽤用上有限制，無法傳遞資料，需通過NSUserDefaults、App Group或透過Server進⾏行資源共享。

TWO SIZE

38 mm 42 mm

THREE MODES

Watch App Glance Notification

SIMULATOR

SIMULATOR

RESOURCES• WATCHKIT TIPS FOR DEVELOPERS

• WatchKit: Using Handoff in an Apple Watch App

• “My Biggest WatchKit Mistake”

• WatchKit: Initial Impressions

• App与Extensions间通信共享数据

• WatchKit - Zonble

• [iOS] Watch App Architecture | 逍遙⽂文⼯工作室

DEMO & 實作