Unable to share a CKRecord

问题

I wrote the code below to share a CKRecord:

CKRecordZone *restaurantsZone = [[CKRecordZone alloc] initWithZoneName:@"RestaurantsZone"];
CKRecordID *recordID = [[CKRecordID alloc] initWithRecordName:self.recordName zoneID:restaurantsZone.zoneID];
CKRecord *record = [[CKRecord alloc] initWithRecordType:@"Restaurant" recordID:recordID];
[record setValue:self.restaurant forKey:@"name"];

UICloudSharingController *cloudSharingController = [[UICloudSharingController alloc] initWithPreparationHandler:^(UICloudSharingController * _Nonnull controller, void (^ _Nonnull preparationCompletionHandler)(CKShare * _Nullable, CKContainer * _Nullable, NSError * _Nullable)) {
    [self shareRootRecord:record name:self.restaurant completion:preparationCompletionHandler];
}];
cloudSharingController.delegate = self;
[self presentViewController:cloudSharingController animated:YES completion:nil];

And the shareRootRecord function:

- (void)shareRootRecord:(CKRecord *)rootRecord name:(NSString *)name completion:(void (^)(CKShare * _Nullable share, CKContainer * _Nullable container, NSError * _Nullable error))completion
{
    CKShare *shareRecord = [[CKShare alloc] initWithRootRecord:rootRecord];
    shareRecord[CKShareTitleKey] = name;
    NSArray *recordsToSave = @[rootRecord, shareRecord];
    CKContainer *container = [CKContainer defaultContainer];
    CKDatabase *privateDatabase = [container sharedCloudDatabase];

    CKModifyRecordsOperation *operation = [[CKModifyRecordsOperation alloc] initWithRecordsToSave:recordsToSave recordIDsToDelete:@[]];
    [operation setPerRecordCompletionBlock:^(CKRecord * _Nullable record, NSError * _Nullable error) {
        if (error) {
            NSLog(@"%@", [error localizedDescription]);
        }
    }];
    [operation setModifyRecordsCompletionBlock:^(NSArray<CKRecord *> * _Nullable savedRecords, NSArray<CKRecordID *> * _Nullable deletedRecordIDs, NSError * _Nullable error) {
        if (error) {
            NSLog(@"%@", [error localizedDescription]);
        }
        completion(shareRecord, container, error);
    }];

    [privateDatabase addOperation:operation];
}

Now, when I run this code, the following error is thrown: Only shared zones can be accessed in the shared DB. I can't seem to be able to figure out why, though. Any ideas?

回答1:

Make sure the CKRecord you want to share is already in the owners privateDB before you share it.

When a participant accepts the share, that's when the record will appear in the participants sharedDB.

This code creates a record and a share and then tries to modify the sharedDB of the owner with the records.

Conceptually, you want to share a a record in an owners privateDB with a participant. The sharedDB of a participant acts as a window into the privateDB of the owner.

来源：https://stackoverflow.com/questions/47703266/unable-to-share-a-ckrecord

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ios

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cloudkit