Push notifications guide

To guide you on push notifications, particularly for broadcasting updates to Live Activities, Apple introduced a new feature at WWDC 2024. This feature allows developers to send a single push notification to update multiple devices simultaneously, which is particularly useful for events with a large audience, such as sports games or flight updates.

Here's a brief guide on how to implement this:

1. Enable Broadcast Capability: First, enable the broadcast capability for your app in the developer portal under push notifications.

2. Create a Channel: Use the Push Notifications Console to create a channel for your event. Each event should have a unique channel ID, similar to a TV or radio channel.

3. Subscribe to Updates: Your app can subscribe to updates by leveraging ActivityKit to receive live activity updates using the new channel push type.

4. Send Broadcast Push Notifications: Use the Push Notifications Console to send updates. You can configure the notification with a payload that includes the necessary information, such as scores or updates, and send it with high priority to ensure immediate delivery.

5. Channel Management: Manage the lifecycle of channels using the channel management API. This includes creating, deleting, or updating channels as needed.

For more detailed steps, you can refer to the session titled "Broadcast updates to your Live Activities" from WWDC 2024. You can start by watching the Get started chapter for a comprehensive overview.