CloudKit Sharing

Question

I am having trouble understanding some of the CloudKit sharing concepts and the WWDC 2016 \"What\'s new in CloudKit\" video doesn\'t appear to explain everything that is req

Answer 1

I didn't understand quite well when you want to get those informations. I'm with the same problem as you, but I only can get the shared data by clicking the URL... To do that you'll need two functions. First one in AppDelegate:

func application(_ application: UIApplication, userDidAcceptCloudKitShareWith cloudKitShareMetadata: CKShareMetadata) {

    let acceptSharesOperation = CKAcceptSharesOperation(shareMetadatas: [cloudKitShareMetadata])
    acceptSharesOperation.perShareCompletionBlock = {
        metadata, share, error in
        if error != nil {
            print(error?.localizedDescription)
        } else {
            let viewController: ViewController = self.window?.rootViewController as! ViewController
            viewController.fetchShare(cloudKitShareMetadata)
        }
    }
    CKContainer(identifier: cloudKitShareMetadata.containerIdentifier).add(acceptSharesOperation)
}

in ViewConroller you have the function that will fetch this MetaData:

func fetchShare(_ metadata: CKShareMetadata) {
    let operation = CKFetchRecordsOperation(recordIDs: [metadata.rootRecordID])
    operation.perRecordCompletionBlock = { record, _, error in
        if error != nil {
            print(error?.localizedDescription)
        }
        if record != nil {
            DispatchQueue.main.async() {
                self.currentRecord = record
                //now you have your Shared Record
            }
        }
    }
    operation.fetchRecordsCompletionBlock = { _, error in
        if error != nil {
            print(error?.localizedDescription)
        }
    }
    CKContainer.default().sharedCloudDatabase.add(operation)
}

As I said before, I'm now trying to fetch the ShareDB without accessing the URL. I don't want to depend on the link once I already accepted the share. Hope this helps you!