I’m working on an iOS app that uses Live Activities to display dynamic content. The app is set up to handle server-initiated live activities using push notifications. I want to download an image URL from the notification payload, cache it, and then share the cached image path with the live activity extension.

What I’ve Done:

• Set up App Groups to share data between the app’s main target and the live activity extension.
• Successfully implemented client-initiated live activities where I fetch and cache the image locally, and the live activity reads the cached image path.
• Can fetch and display cached images in the app.

The Problem:

I’m struggling with server-initiated live activities. Specifically:

1. How can I intercept the live activity push notification sent by the server to download and cache the image before the live activity starts?
2. How do I pass the cached image path to the live activity extension after caching it?

What I’ve Tried:

• Implemented application(_:didReceiveRemoteNotification:fetchCompletionHandler:) to log and cache images from push notifications, but I’m not sure how to connect this step to the live activity.
• Read about UNUserNotificationCenterDelegate methods but can’t figure out the best place to intercept the notification for live activities.

Expected Outcome:

I want to:

1. Intercept the server-initiated live activity push notification.
2. Download and cache the image locally.
3. Pass the cached image path to the live activity extension via the shared App Group.

How can I achieve this? Any advice, patterns, or sample code would be greatly appreciated!