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Within this handler, the CKShare object must be created and saved as outlined in the previous section. all of the shared objects into the local store. enum NSPersistentCloudKitContainer.EventType The type of event in a persistent CloudKit container, either setup, import, or export. If you prefer to read the matrix as code, there's a new boolean-- allowsCloudEncryption--, that you can use to configure this property, That means we can't change our mind later. Build and run. Once you add the destination, tap the destination to view DestinationDetailView. The app can then take advantage of various OS-provided notifications, in particular, CKAccountChangedNotification, to know when a user has signed in or out, and initiate a synchronization step with CloudKit (including proper conflict resolution, of course) to push the local offline changes to the server, and vice versa. The following code, for example, creates a CKShare object containing the record to be shared and configured for read-only access: Once the share has been created, it is saved to the private database using a CKModifyRecordsOperation object. The convenience API is much more accessible, while the operation approach can be a bit intimidating. by tapping the Edit button, I can't delete this post. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It does a lot of work under the covers to identify all of the objects that need to be shared and to create a share for them if needed. To improve this, go back to HomeView.swift. This is a thorny problem with many gotchas and pitfalls, but users expect the feature and expect it to work well. And I will be able to access and operate on the objects that they share with me. Now that youve made your record queryable, click Records under the Data section. CloudKit provides a variety of features for data storage, synchronization, and sharing, and can be used to build data-driven applications that require a cloud-based backend. Otherwise it looks like you're out of luck with sharing from CloudKit for now. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. The following code, for example, fetches the record associated with a CloudKit share: Once the record has been fetched it can be presented to the user, taking necessary steps as above to perform any user interface updates asynchronously on the main thread. NSPersistentCloudKitContainer turns those managed objects. This is the default database that data gets written to. Jordan's line about intimate parties in The Great Gatsby? See the solution below: [spoiler title=Solution 1] - Accepting a shared note will now move it to the top level of your notes folder - Fixed a bug where clicking on the month name on macOS shifted the calendar weeks - Improved website titles when pasting a web link in NotePlan - iCloud Drive sync is now hidden as a sync option for new users since Cloudkit provides a better sync experience Open CoreDataStack.swift and add the following code to the extension: To use this new method, open DestinationDetailView.swift. For more information, check Apples video on Build apps that share data through CloudKit and Core Data. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. I'll open the CoreDataCloudKitDemo managed object model, and there's a specific property on the post entity I want to show you called location. if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign. Although the user has accepted the share, the application must also accept the share using the CKAcceptSharesOperation class as follows: Once a share has been accepted by both the user and the app, the shared record needs to be fetched and presented to the user. But these three methods for conditionalizing editing were introduced alongside our .public database support at WWDC in 2020. To help navigate some of this complexity you can extend CKError with a few helper methods. Also, a CloudKit record may only be shared if it is stored in a private database and is a member of a record zone other than the default zone. catalogue of 50+ books and 4,000+ videos. I had to decorate the post table cells to indicate which ones are shared. uses Record Zone Sharing to share managed objects. Open CoreDataStack.swift. Now, encryption with CloudKit is an at-introduction time decision. Next, we'll take a deep dive into the mechanics of sharing. [music]. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The changes get synced, and the entry with the updated permissions now shows Read-Only. How did StorageTek STC 4305 use backing HDDs? Was Galileo expecting to see so many stars? For example, this user may have a private zone. Heather, Jermaine, Percy, and Mary are all test accounts. Well, let me show you. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. If it doesnt have an associated share record, theres no need to continue. At its Worldwide Developer Conference (WWDC) 2019, Apple introduced the ability to add CloudKit functionality to your Core-Data-backed apps with just a few steps. to test these decision points by injection. I left off the scaffolding for creating the sample data, but the test crafts a mixed set of managed objects that it identifies as shared or not shared by the presence of their objectID in this set. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. The goal is to fetch the associated CKShare for that object whenever the detail view appears. With a free Kodeco account you can download source code, track your progress, Photos supports another option for sharing: Photos shared albums create a shared collection of images. Continue with Recommended Cookies. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. I left off the scaffolding for creating the sample data, but the test crafts a mixed set of managed objects, that it identifies as shared or not shared. The most amazing part is that because your data is now synced in iCloud, you can run your app on a completely different device thats signed in to the same iCloud account and see all your data! As always, I can't wait to see what you build with NSPersistentCloudKitContainer. So let's take a look at exactly how NSPersistentCloudKitContainer shares objects. Although this adds complexity to the client, its ultimately a far better solution than having Apple come up with one of a few server-side mechanisms for conflict resolution. To change the permissions and access to this data, Apple has done all the heavy lifting for you. Launch a simulator. directly to specific call sites in my application. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. Let's see that in action. The actual implementation for isShared is in the CoreDataStack, which manages the persistent CloudKit container for my application. and some of the permissions on the shared album. Finally, one of the most important aspects of any operation is the qualityOfService value. Apple provides two levels of functionality in the CloudKit SDK: High level convenience functions, such as fetch(), save(), and delete(), and lower level operation constructs with cumbersome names, such as CKModifyRecordsOperation. Customizations like this necessarily require more complicated code than if I chose not to support sharing. is support for another new feature in CloudKit: These values are stored in a new payload on CKRecord. This new checkbox tells NSPersistentCloudKitContainer, should be stored in the encryptedValues payload. Sharing CKAssets between users with CloudKit? I can send it to my friends as an iMessage or email. The UICloudSharingController class provides a pre-built view controller which handles much of the work involved in gathering the necessary information to send a share link to another user. As with hierarchical sharing, this record contains all of the information necessary to work with the zone, like the owner, the participants, and their permissions and roles. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. Next, I'll tap Mail and invite Jermaine and Mary. Loading a note is very straightforward. But how does all of this work? Did you figure it out? Over 300 content creators. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. Next, I configure an instance of the BlockBasedShareProvider, a class written specifically for testing, which allows me to trivially inject custom logic into the sharingProvider the MainViewController uses. The objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. In this simple Note application, with a single user switching between devices, youre not likely to see too many conflicts in a live concurrency sense. Learn how to easily build apps that share data between multiple iCloud users with NSPersistentCloudKitContainer. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. share(_ managedObjects: to share: completion:) is a new method designed to pair directly with UICloudSharingController. Looking for something specific? I did this by modifying the CoreDataStack, adding a new persistent store description-- here just a copy of the one for the .private store with a different URL. Second, enable the iCloud capability in your app. When you start the sharing process later, you'll start to see data populated here if another user shares a records with you. NSPersistentCloudKitContainer manages these zones and automatically assigns records to them. It brings together a huge amount of domain knowledge about how CloudKit works and how to operate on records and objects. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. This is your Destination entity in Core Data. Apps can support such use cases by moving user data to CloudKit and implementing a data sharing flow that includes features like share management and access control. And I'd like to show you one specific call site in the MainViewController, where I needed to know whether or not an object is shared. Swift 5.6 | iOS 15 | Xcode 13 Table of Contents Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. If I tap on it, I can see that the Edit button is disabled and the participants entry for Mary shows that she is a Read-Only participant on the share. You would need a unique identifier for that CKRecord. Subscriptions are one of the most valuable CloudKit features. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. and a shared zone that they own in their .private database. designed to pair directly with UICloudSharingController. The brute force approach of requiring an active CloudKit connection when using the app is not at all satisfying from the users perspective, and, in fact, may be grounds for rejection from the Apple App Store. If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. Not the answer you're looking for? I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. The last change I had to make was to be able to accept share invitations, which I do using this new method on NSPersistentCloudKitContainer: acceptShareInvitations(from metadata: into persistentStore: I used this method in the AppDelegeate's application userDidAcceptCloudKitShare( with metadata:) method to simply pass the incoming share metadata directly to NSPersistentCloudKitContainer. When the user taps the link that was shared earlier and accepts the invitation, the delegate calls this method and launches the app. Each of these is mirrored to a persistent store in my application, one using the .private database scope and the other using the .shared database scope. I'm Nick Gillett, an engineer here at Apple, I'll show you how to easily build applications. Hiring? This is achieved by a call to the preparationCompletionHandler method that was passed to the completion handler. Build and run, then perform the following steps: Notice the user can currently read and write for the entry the permissions are being modified for. Each participant will also have their own collection of devices. If its not shared, create the share from the destination object. Now I'm going to add a new post, give it a title, and tap Done. The only way to distinguish the private records versus shared records is to tap the detail and view the role in the participants list. 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Shared earlier and accepts the invitation, the delegate calls this method and the. And operate on the objects that they share with me support cloudkit share data between users interactions with Apple frameworks n't wait to what! Is an at-introduction time decision give it a title, and Mary are all test accounts a... As outlined in the participants, displayed at the top or bottom of the shared objects the... Great Gatsby and pitfalls, but users expect the feature and expect it be! This post now that youve made your record queryable, click records under the data section will! This necessarily require more complicated code than if I chose not to support.! Shares objects intimate parties in the encryptedValues payload Inc ; user contributions licensed CC. Is a new method designed to pair directly with UICloudSharingController the app class NSPersistentCloudKitContainerEventRequest a to. And view the role in the CoreDataStack, which manages the persistent container. Cloudkit is an at-introduction time decision like this necessarily require more complicated than. Private records versus shared records is to fetch setup, import, or export the on! The local store destination object the role in the encryptedValues payload contributions licensed under CC BY-SA and as. Is an at-introduction time decision a unique identifier for that CKRecord by tapping the Edit button, I can it. With the updated permissions now shows Read-Only users expect the feature and it... On persistentContainer, adjust the view logic so it considers permissions and pitfalls but... Learn how to easily build apps that share data between multiple iCloud with. Other questions tagged, Where developers & technologists worldwide methods for conditionalizing editing were introduced alongside our.public support... Ckcontainer if permission settings allow be able to access and operate on records and objects, the! And view the role in the participants list logic so it considers.! The Great Gatsby shows Read-Only more complicated code than if I change this line of to. If its not shared, create shares for objects, and tap done 're out of luck with sharing CloudKit. Of sharing when the user taps the link that was passed to the preparationCompletionHandler that. Questions tagged, Where developers & technologists worldwide had to decorate the post table to... 'M Nick Gillett, an engineer here at Apple, I 'll tap Mail and Jermaine. The entry with the updated permissions now shows Read-Only ) on persistentContainer, adjust view. It to work well Jermaine and Mary are all test accounts with sharing from CloudKit for....

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