desiredKeys
The fields of the records to fetch.
Declaration
@property (nonatomic, copy) NSArray<NSString *> * desiredKeys;Discussion
Use this property to limit the amount of data that CloudKit returns for each record during the fetch operation. When CloudKit returns a record, it only includes fields with names that match one of the keys in this property. The property’s default value is nil, which instructs CloudKit to return all of a record’s keys.
If you’re retrieving records of different types, make sure the array includes the fields you want from all of the various record types that the operation can return.
If you intend to specify a value other than nil, do so before you execute the operation or add the operation to a queue.