iOS 動態通知 (Live Actiivty) 的挑戰與機會

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從這開始

Content

• Live Activity
• Implementation
• Case Study

Live Activity

Intro.

• apple 在 iOS16 的新功能
• 會出現在上面
• demo
  • IG限時動態
  • LinePay
  • UberEat

Device Support

Smart Stack / Locj Screen / Dynamic Islabd

• iOS 16: iPhone
• iOS 17: iPad
• iOS 18: Apple Watch

Restrictions

• can not access network, location
• at most 5 live activities on a device
• 8+4 hrs, lifetime
  • 啟動後8hr內可更新
  • 8+4 lifetime
• Payload 4KB
  • (unknown,官方文件沒有提供) 更新頻率

create -> Update -> End

• Local: 都可以
• Remote
  • create
    • push notification permission needed
    • PushToStartToken needed
    • IOS 17.2+
  • Update
    • Push Notification permission needed
    • PushToken needed
  • End
    • Push Notification permission needed
    • PushToken needed

Activity State

• Active -> 直接滑掉 -> Dismissed (Invisible, can not update)
• Ended: Visible, can not update

UI Presentation

• 動態島
• 鎖定螢幕
• 手錶

Dynamic Island

3 presentation mode

• Compact Mode
• Minimal
• Expanded
  • 長按動態島
  • four views: leading, center, bottom, trailing
• iOS 17+ 手機橫放

Content (Medium)

• alert: 自動展開通知
• Permission Request UI
  • 是否authorize該App live activitiy

Apple Watch

• iOS 18+
• View: Leading, Trailing

Recap

(table)

Implementation

Define Live Activity

• declare ActivityAttributes
• needs to be included by both app and its extensions

Define Live Activity UI

• All presentations (content, dynamic island) should be defined
• 可以給空的view, 建議不要

Activity Families

• get state -> return different UI
• iOS 18才有支援，如何同時支援iOS 18之前&之後
  • provide 2 activity configurations
• Apple Watch?
  • 把該部分的抽出來

Remote Operations

• iOS 17.2+
• push notification permission required
• keey file required
• call APNs API
• 保護好key
• PRIORITY
  • 1~10，只適用於自己的app中的優先級
• ACTIVITY_PUSH_TOKEN

Remote Start Flow

• get pushToStartToken, 涉及到網路連線
• 存到 server
• 組出request
• 推播到裝置, live activity
• local or remote 啟動後 -> upload pushToken to server
  • If user doesn't clikc the activity
  • Solution: ??反正要想辦法拿到

Case Study

Line 購物
get line points
time limited line points activity -> Line designed a live activity

Live Activity: time limited

• 商家icon
  • store them!
  • 放到4KB的那裏面
• push tokens upload fails
  • Plan and Design in advance
• Can NOT request new live activity if it reaches the limit
  • Checks status when possible Manage it remotely and locally
  • 想辦法讓他點進App -> clear some notifications

Live Activity

• new entrance to app
• limitations
• variants