# registerGroupActivity(_:) Registers a group activity instance with the specificed options. ``` @nonobjc func registerGroupActivity(_ activity: ActivityType) where ActivityType : GroupActivity ``` ## Parameters `activity` The `GroupActivity` to register. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)