How to sync records between Core Data and CloudKit efficiently
问题 I'm currently learning how to use CloudKit Framework and lack of documentation or examples showing how to sync Core Data and CloudKit. I have watched all WWDC videos (2014, 2015, 2016) Dedicated to CloudKit, but none of them telling us how to implement syncing with Core Data. I can't find any fresh examples, tutorial or books, showing how to implement this syncing. I know that it is effective to use Operations API by CloudKit (not Convenience API) and to Subscribe to changes as it said in the