# init(session:) Creates a journal and associates it with the specified session of a group activity. ``` convenience init(session: GroupSession) where Activity : GroupActivity ``` ## Parameters `session` The session you use for communicating with participants. The session must be in the [`GroupSession.State.waiting`](/documentation/GroupActivities/GroupSession/State-swift.enum/waiting) or [`GroupSession.State.joined`](/documentation/GroupActivities/GroupSession/State-swift.enum/joined) state when you create the journal, and the session must be in the [`GroupSession.State.joined`](/documentation/GroupActivities/GroupSession/State-swift.enum/joined) state before you can send or receive attachments. ## Return Value A [`GroupSessionJournal`](/documentation/GroupActivities/GroupSessionJournal) object configured for the specified session. --- 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)