Is it possible to transfer data between different contexts in Core Data?

Yes, in Core Data, data can be transferred between different contexts (NSManagedObjectContext). Usually, several approaches are used:

1. Using NSManagedObjectID — this is a unique identifier for an object that can be safely passed between contexts. In another context, you can get the object by this ID using the object(with:) method.

2. Saving changes in one context and merging them into another — when saving changes in one context, other contexts can be notified to update using notifications or merge methods (mergeChanges(fromContextDidSave:)).

3. Using parent and child contexts — a child context can pass changes to its parent, simplifying synchronization.

Thus, data between contexts is transferred via object identifiers and save/merge mechanisms, ensuring data integrity and consistency.