106: Push It to the Limit

iOhYes

Discussion

Push Notification Overview

• Notifications
  • Intended for user
  • Certificate required
  • Can be disabled
  • Remote vs. Local
    • Local - schedule by the app on device
      • Best example is Reminders app
      • Schedule by
        • elapsed time or exact time
        • location based
    • Remote - come from your server
• Actions
  • Interactive Notifications
  • Categories

• Text Input

  • New type of “Action”
  • Behavior is “.textInput”

• APNS (Apple Push Notification Service)

  • Device token created by APNS, need to store on server, associated with particular client app
  • Payload must include aps, but can also include custom values, as well
  • Payload “aps dictionary”: alert (string or dictionary), badge, sound, content-available, category
  • Payload alert dictionary: title, body, title-loc-key, title-loc-args, action-loc-key, loc-key, loc-args, launch-image
  • Silent notifications (content-available == 1) wakes your app in the background so that you can fetch data, etc.
  • Feedback service, how to discover tokens that are no longer active
  • Device tokens are 32 bytes, may be increasing to 100 bytes soon
  • New provider API released in 2015
    • HTTP/2
      • notification requests to APNS get a response
      • multiplexed
      • binary
    • Notification requests
      • POST
      • json
    • Notification responses
      • 200 OK
      • 400 BAD REQUEST with json payload and reason
    • Instant Feedback
      • Allows you to learn about inactive tokens in the notification response via 410 status code in the response
    • Simplified Certificate Handling
      • Now one certificate for all push actions
    • Push notifications payload size increased from 2KB to 4KB

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