Cloudkit: CKDatabaseOperation not working on cellular
问题 Hi to all the CloudKit users: I had a horrible time trying to find out why CKDatabaseOperation wouldn't give any feedback. No errors, no callbacks when saving CKRecords on cellular. Could you please let me know what is your opinion regarding this? 回答1: Someone in the Developer Forums of Apple found a solution: https://forums.developer.apple.com/thread/20047 the magic happens when setting qualityOfService = .UserInitiated Example: let publicDB = CKContainer.defaultContainer()