问题
I noticed that the docs mention that the newly introduced shared CloudKit databases do not support CKQuerySubscription (in earlier iOS versions these were called CKSubscription). So I guess that means that it is not possible to notify users when privately shared records have changed. Major disappointment. Has anyone run into this problem?
回答1:
According to the WWDC video about CloudKit this year:
So, new this year in iOS 10, there's an API called CKDatabaseSubscription.
This allows you to subscribe to any change across an entire database, and it works in a private database, in a shared database.
It shows you how starting on slide 51:
CloudKit Best Practices WWDC 2016 Presentation Slides
来源：https://stackoverflow.com/questions/38945807/ckquerysubscriptions-are-not-supported-in-a-sharedclouddatabase