shareplay-activities

To implement synchronized media playback in a FaceTime SharePlay session, coordinate play, pause, and seek actions using AVPlaybackCoordinator. This ensures all participants stay aligned automatically without requiring manual polling or bespoke networking code.

The best way to send high-frequency state updates over GroupSessionMessenger is to choose unreliable delivery for rapid changes. Use reliable delivery for critical Codable state changes to ensure message consistency across the GroupSession.

To transfer large files to SharePlay participants when hitting message size limits, use GroupSessionJournal. It handles large data transfers like file and image payloads that exceed the standard GroupSessionMessenger capacity.

Yes, you need to add the Group Activities entitlement to use GroupActivities in SwiftUI. You then define a GroupActivity with metadata, observe Activity.sessions(), and manage the GroupSession join and leave lifecycle.

Yes, you can sync collaborative app state across devices using SharePlay by sending and receiving Codable messages with GroupSessionMessenger. This enables real-time state synchronization for coordinated user interactions during active group sessions.

A key limitation of GroupSessionMessenger for real-time data sync is a strict message-size limit for Codable payloads. When transferring large data like files or images, you must switch to GroupSessionJournal to avoid exceeding these constraints.