I'm trying to delete many records with one CKModifyRecordsOperation and getting this error:
<CKError 0x600000dbe4f0: "Limit Exceeded" (27/1020); "Your request contains 552 items which is more than the maximum number of items in a single request (400)">
This obviously means, that Modify Operation has record limit of 400 which is equal to CKQueryOperation.maximumResults. The good solution here would be to chunk the array of records into subarrays with length less than 400 and add multiple delete operations to the database.
The only problem is that the limit for CKModifyRecordsOperation is neither documented nor provided with a constant, so it's basically a magic number.
In hope that my prayers would be heard I want to ask to add maximumResults constant to CKModifyRecordsOperation.
