CloudKit: Delete local objects based on CKQueryNotification

Based on your clarification in the comments, I suggest configuring the .recordFields dictionary when you create the subscription. You can pass a limited amount of info in this dictionary, such as the record type. When you receive the deletion notification, you can unpack the recordFields from the notification object.

You can find more info in Apple's docs at https://developer.apple.com/documentation/cloudkit/ckquerynotification/1428114-recordfields

Update

Here's how I do it. I use objective-C, so you'll have to sort out the SWIFT syntax. But the steps are:

Create an array of records I want sent in the notif

Create a subscription

Create a notificationInfo object

Add my desired keys array to the notificationInfo object

Create the sub using a CKModifySubscriptionsOperation

NSArray *desiredKeys = @[fieldname1, fieldname1, fieldname1];
CKQuerySubscription *subscription = [[CKQuerySubscription alloc] initWithRecordType:recordName
                                                                          predicate:searchConditions
                                                                     subscriptionID:subscriptionID
                                                                            options:fireOn];

CKNotificationInfo *notificationInfo = [CKNotificationInfo new];
notificationInfo.shouldBadge = shouldBadge;
notificationInfo.desiredKeys = desiredKeys;

subscription.notificationInfo = notificationInfo;

CKModifySubscriptionsOperation *subOp = [[CKModifySubscriptionsOperation alloc] initWithSubscriptionsToSave:subsToCreate subscriptionIDsToDelete:subsToDelete];
subOp.modifySubscriptionsCompletionBlock = ^(NSArray<CKSubscription *> *savedSubscriptions,
                                             NSArray<NSString *> *deletedSubscriptionIDs,
                                             NSError *operationError)
{
   //do whatever
}

subOp.database = database;      //set to either public or private DB
[myQueue addOperation:subOp];

When you receive a notification, you just pull the objects back out of the notificationInfo:

    NSString *value1 = [queryNotification.recordFields objectForKey:fieldname1];

If it won't let you actually add the recordType, then you may have to create a custom field with some indicator of the record type, and then pass that as I described above, or fetch the record in question by using the recordID you received in the notification.