How do I implement Push Notifications

To implement push notifications, particularly for broadcasting updates to Live Activities, you can follow these steps as outlined in the WWDC session titled "Broadcast updates to your Live Activities":

1. Enable Broadcast Capability:

   • Use the developer portal to enable the new broadcast capability for your app under the push notifications section.

2. Create a Channel:

   • Navigate to the Push Notifications Console, go to the channels tab, and create a new channel. This channel will have a unique channel ID used by the app to subscribe for updates and by the server to send updates.

3. Use the Push Notifications Console:

   • The console allows you to test integration with APNs and has been expanded to support broadcast push notifications. You can configure the environment and message storage policy for your channel here.

4. Subscribe to Updates:

   • Use ActivityKit in your app to subscribe to live activity updates using the new channel push type. This involves passing the channel ID to ActivityKit to subscribe for push updates.

5. Send Broadcast Push Notifications:

   • Use the Push Notifications Console to send a broadcast push notification. Select the channel, create a new notification, and use the payload builder to add content. Send the notification to update all subscribed devices.

6. Manage Channels:

   • Use the channel management API to create or delete channels as needed. Ensure your server can manage channels and send broadcast push notifications directly using the new APNs API.

For more detailed guidance, you can refer to the session Broadcast updates to your Live Activities (08:39) which covers how to send broadcast push notifications to update live activities on multiple devices at once.