# init(_:) Initializes the sharing controller with the specified activity and type information. ``` @MainActor init(_ activity: ActivityType) throws where ActivityType : GroupActivity ``` ## Parameters `activity` The activity object to start. --- 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)