问题
I am trying to implement core data sync using iCloud. However, there is one attribute that I don't want to sync. Is there a proper way to tell iCloud to sync most managed objects and attributes, but not others?
回答1:
Right now, Core Data + iCloud does not support this kind of configuration. You may have to split your Data into two Persistent Stores (lokal, cloud).
回答2:
One workaround would be to add the things you do not wish to sync to an entity that includes a unique device identifier.
In this way, they still get synced, but you can use just the data pertinent to the specific device and ignore the data from other devices.
来源：https://stackoverflow.com/questions/13448793/core-data-icloud-exclude-certain-attributes-from-sync