# registerCKShare(container:allowedSharingOptions:preparationHandler:) Creates and registers a new collaboration object using a collection of records to share. ``` func registerCKShare(container: CKContainer, allowedSharingOptions: CKAllowedSharingOptions = CKAllowedSharingOptions.standard, preparationHandler: @escaping @Sendable () async throws -> CKShare) ``` ## Parameters `container` A the system uses to coordinate all the interactions between your app and the server. `allowedSharingOptions` The . The standard option is the default. `preparationHandler` The handler the system calls in your app to create a new . ## Discussion Use this method to share a collection of objects that don’t have an existing assignment. When the system calls the `preparationHandler`, your app creates a new `CKShare` with the appropriate root `CKRecord` or . After the server successfully saves the share, invoke the with either the resulting `CKShare`, or an `NSError` if the save fails. When the system invokes the share sheet with a `CKShare` that you register with this method, it prompts the user to start sharing. --- 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)