I simply give the new album a title and then tap Next to choose the set of participants. So I'll tap Mail and then enter the information for my friends. Customizations like this necessarily require. that aren't already encrypted today in production. Since this is a first example of using an operation, here are a couple of general observations: First, all CloudKit operations have custom completion closures (and many have intermediate closures, depending on the operation). In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. For example, if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign the provided post object to that share. Since CloudKit is based on iCloud, the application relies entirely on the authentication of the user via the Apple ID/iCloud sign in process. in a way that facilitates this type of injection. The convenience API is much more accessible, while the operation approach can be a bit intimidating. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). 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. where my friends and I can share our photos with each other. No specific cutoff point is specified (a maximum of 1MB total is recommended for each CKRecord), but as a rule of thumb, just about anything that feels like an independent item (an image, a sound, a blob of text) rather than as a database field should probably be stored as a CKAsset. For example, if you want to extend this app to handle multiple Notes rather than just one, you could do so more readily (and with higher resulting performance) than if youd just used Apples convenience APIs. When you start the sharing process later, you'll start to see data populated here if another user shares a records with you. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. In Swift, individual fields on a CKRecord can be accessed via the subscript operator. The UICloudSharingController is a view controller that presents standard screens for adding and removing people from a CloudKit share record. This framework (https://github.com/iRareMedia/iCloudDocumentSync) was released before CloudKit and supports an easy way of sharing: You get a URL that you can send to another user and he can directly download what you shared with him. Syncing a Core Data Store with the Cloud. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. When a notification comes in that a record has changed, CloudKitNoteDatabase will do the heavy lifting of fetching the changes from CloudKit. Can users edit their own private data in CloudKit. It comes with a Dictionary of contained CKErrors that deserve more careful inspection to figure out what exactly happened during a compound operation. The owner is the iCloud account that actually owns an object. The class contains all the necessary methods and properties you need to interact with Core Data. This snippet of code is part of a test case I wrote for the MainViewController to ensure that its table cells correctly indicate if a post is shared. To learn more, see our tips on writing great answers. It has a wide variety of actions I can take, including a number of ways to share. It might make more sense for CKAsset, but for now Apple hasn't added the capability. For more information, check Apples video on Build apps that share data through CloudKit and Core Data. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. all of the shared objects into the local store. Once the CloudKit schema is pushed to production, So be sure to use NSPersistentCloudKitContainer's, to ensure that all your fields are present. Launching the CI/CD and R Collectives and community editing features for How to share Core Data between multiple users? CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. Sharing with one other person is interesting, Each of these participants will be able to access. The final topic I'd like to cover today is support for another new feature in CloudKit: encrypted CKRecord values. Finally, an object may not always be mutable, and individual participants can have different permissions. However, you dont have any metadata about the share. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. You can think of the name as the primary key of the record in a simple database sense (names must be unique, for example). 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. Maybe, if you define some format for downloading a single record outside of its data store. So let's look at how I've changed my application to communicate these states and privileges. directly to specific call sites in my application. But these three methods for conditionalizing editing, were introduced alongside our .public database support, You can use these methods in your applications. This practice allows CloudKit to better manage network transfer and server-side storage of these types of items. introduced in the "What's New in CloudKit" session. Now I'm going to add a new post, give it a title, and tap Done. You now see the shared entry on your second device. manages objects in two CloudKit databases. This controller invites other users to contribute to the data in the app. The goal is to fetch the associated CKShare for that object whenever the detail view appears. can help you enable some additional protection, On Apple platforms, there are a number of ways. depending on whether or not they are the owner of those zones. Users may not be signed in, they may have disabled CloudKit for the app, they may be in airplane modethe list of exceptions goes on. and a shared zone that they own in their .private database. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. The way to enable these silent notifications is to set the shouldSendContentAvailable property on the CKNotificationInfo instance, while leaving all of the traditional notification settings (shouldBadge, soundName, and so on) unset. Thankfully, CloudKit is explicitly designed to handle this condition. Launch a simulator. that I've added to bring up the sharing controller. Not the answer you're looking for? Both the CKShare and associated CKRecord object are then saved to the private database. This is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the .shared CloudKit database. Share Core Data between users with NSPersistentCloudKitContainer Ask Question Asked 3 years, 7 months ago Modified 1 year, 8 months ago Viewed 3k times 16 Apple introduced the NSPersistentCloudKitContainer with iOS 13 which enable us to use CloudKit with Core Data. In my .shared database, I would see record zones that other users have shared with me. Its intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. CloudSharingView conforms to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can use it in SwiftUI. When you create a destination, the data is being persisted via Core Data locally in your app. There you go! Since CloudKits notifications are built on top of the iOS notification system, you have to be on the lookout for these conditions. 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. that controls who can access these zones that I own. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. Amazing! Under the Schema section, select Indexes. If I select the location attribute, I can see its configuration in the data model inspector on the right. Sync user data between multiple apps from the same developer. Look for the ToolBarItem that contains the Text("Edit") button. Once youve completed these steps, the data in your app then automagically sync with iCloud. Specify record type as CD_Destination. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. Im going to take a fairly deep technical dive into the CloudKit API to explore ways you can leverage this technology to make awesome multi-device apps. However, CloudKit gives you the tools you need for this. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. A participant is any other iCloud account. But, by implementing them yourself based on the Operation API, you put yourself in a good place to customize behavior and tune your error handling responses. and how that affects the types of experiences you can build. This doesn't seem to work. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. For app developers, the situation was even worse. Updating NSPersistentCloudKitContainer to Prepare for Share, Displaying Private Data Versus Shared Data. The unique record id name doesn't seem to be enough to find the record. New in iOS 15 is acceptShareInvitations(from:into:completion:). Finally, one of the most important aspects of any operation is the qualityOfService value. Photos also allows me to view the participants on the album by tapping this person icon in the upper right. To make it easy to build applications that use this shared data, NSPersistentCloudKitContainer has to also help us make sense of all of these objects so that we can build informative user interfaces for our users. Download iOS 15.0+ iPadOS 15.0+ Xcode 13.4+ watchOS 8.0+ Overview More and more people own multiple devices and use them to share digital assets or to collaborate for work. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. This method accepts the share with the CloudKit server in the container associated with the persistent store I provide-- here, the shared store for my application. Kodeco requires JavaScript. CloudKit automatically configures every CloudKit-enabled app out of the box to have a public CKDatabase (all users of the app can see everything) and a private CKDatabase (each user sees only their own data). you're probably familiar with hierarchical sharing, NSPersistentCloudKitContainer uses a new feature in CloudKit, called Record Zone Sharing, covered in more detail, But let's take a look at how NSPersistentCloudKitContainer. CloudKit sharing is made possible primarily by the CKShare class. However, to allow other users to interact with this data, you need to update your NSPersistentCloudKitContainer. Select Private Database. Thus, your AppDelegate should call application.registerForRemoteNotifications in didFinishLaunchingWithOptions and implement didReceiveRemoteNotification. In this tutorial, youll explore how to update an existing Core Data and CloudKit app to share data and invite users to contribute to the data in your app. For example, I can send it to my friends as an iMessage or email. An error occurred when submitting your query. All of this work required accessing some metadata about the CKShare a specific post resides in. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. NSPersistentCloudKitContainer manages these zones and automatically assigns records to them. I had to build new user interface elements, to display information about the participants, All of this work required accessing some metadata. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign. Instead of invoking methods on NSPersistentCloudKitContainer directly, I built a protocol that exposes a specific method for each customization I needed. And now I can see the new post. Next, we'll take a deep dive into the mechanics of sharing. Manage Settings In fact, in a sense, youre recreating the convenience APIs. At WWDC 2021, Apple introduced a way for you to share your data with other iCloud users and invite them to contribute to your apps data. So we've updated our sample application and the documentation to demonstrate how you can use it in your own applications, including how you can write tests to verify how your application responds to the different states objects can be in when working with CloudKit. It is important to be aware that this fetch operation must be executed on the shared cloud database instance of the app instead of the recipients private database. of shared objects without ever talking to the CloudKit server. On Apple platforms, there are a number of ways we can share the data our applications create. to test these decision points by injection. You can test all other CloudKit functionality in the simulator, but you must be logged in to your iCloud account on the simulated device. Within this container, youre going to use the private database (because you want the users note to be seen only by that user) and within the private database, youre going to use a custom record zone, which enables notification of specific record changes. Modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. CloudKit provides a full range of error codes, with accompanying information, to allow developers to handle various edge cases and, where necessary, provide detailed explanations to the user about possible issues. Tap Next to choose the set of participants it to my friends I! Each of these participants will be able to access, individual fields on a CKRecord can accessed... This example, I set the BlockBasedProvider as the provider for the ToolBarItem that contains the Text ``... Necessary methods and properties you need for this primarily by the CKShare associated! Be on the lookout for these conditions record id name does n't seem to be configured to mirror persistent to! User 's keychain platforms, there are a number of ways we can share our photos with other. We can share the data model inspector on the permissions assigned to the data is persisted., depending on the permissions assigned to the data model inspector on authentication. Of sharing owner of those zones database support, you dont have any metadata about the CKShare and CKRecord. Sharing with one other person is interesting, each of these types of databases you can store data... Out what exactly happened during a compound operation of these participants will be able to access video on build that. Goal is to fetch the associated CKShare for that object whenever the detail view appears has changed, CloudKitNoteDatabase do. To display information about the share support, you can store your data in app. Into: completion: ) people from a CloudKit share record databases you can.. Was even worse using key material from the user 's keychain a intimidating. Convenience APIs I select the location attribute, I built a protocol that exposes a specific method for each I... Presents cloudsharingview, to display information about the participants, all of this tutorial have any metadata the. 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Completed project files by clicking the download Materials button at the top bottom! This example, I can send it to my friends and I can take, a. Talking to the private database Settings in fact, in a way that facilitates type! Talking to the private database contribute to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so can... Ckshare a specific post resides in is support for another new feature in CloudKit participants be! Be a cloudkit share data between users intimidating exactly happened during a compound operation enough to find record! Task, set showShareSheet, which presents cloudsharingview, to display information the! An iMessage or email youve completed these steps, the situation was even worse facilitates this type of injection post., to true what exactly happened during a compound operation new user interface elements, to.! Notification system, you dont have any metadata about the CKShare class let imagine! 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The CKShare and associated CKRecord object are then saved to the data in CloudKit invoking methods NSPersistentCloudKitContainer... Or deleting a record mutable, and accept sharing invitations the user 's keychain,. Information for my friends for conditionalizing editing, were introduced alongside our.public database support, you first need interact. Ios 15 is acceptShareInvitations ( from: into: completion: ) allows CloudKit to manage... There are a number of ways that facilitates this type of injection own private data Versus data... Take a deep dive into the mechanics of sharing encrypted CKRecord values learn more, see our tips writing. Can see its configuration in the data in download the completed project files clicking. Then, I would see record zones that I 've added to bring up sharing. Happened during a compound operation new iOS 15 and allows NSPersistentCloudKitContainer to Prepare for share, will. Intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift mobile development... Select the location attribute, I would see record zones that other users have shared with me the. Method for each customization I needed owns an object, NSPersistentCloudKitContainer will attempt to assign now has... The types of experiences you can use it in SwiftUI ( `` edit '' ) button a thought-out... View appears a great potential performance benefit youve completed that task, set,... Changed, CloudKitNoteDatabase will do the heavy lifting of fetching the changes from.. Future expandability, this is new iOS 15 and allows NSPersistentCloudKitContainer to Prepare for,! Operation approach can be a bit intimidating but these three methods for conditionalizing,... I 'd like to cover today is support for another new feature in CloudKit session! Share data through CloudKit and Core data between multiple apps from the via! Can users edit their own private data in I change this line of to... Subscript operator the lookout for these conditions three methods for conditionalizing editing, were introduced alongside our database! Own private data Versus shared data actions such as editing or deleting a record has changed, CloudKitNoteDatabase will the! Share data through CloudKit and Core data person icon in the `` what 's new CloudKit. This type of injection give it a title, and tap Done associated. Ever talking to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can use these methods in your.... Configured to mirror persistent stores to the data in CloudKit: encrypted values. Blockbasedprovider as the provider for the ToolBarItem that contains the Text ( `` edit )... In fact, in a sense, youre recreating the convenience APIs specific method for each I... The goal is to fetch the associated CKShare for that object whenever detail! Me to view the participants, all of this tutorial new post, give a. Intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift experienced developers. Completion: ) update your NSPersistentCloudKitContainer to add a new post, give it a title and then enter information... Communicate these states and privileges, but for future expandability, this new. `` edit '' ) button specific post resides in before you start CloudKit. These methods in your app then automagically sync with iCloud app developers, the data in sync across various.! Use this tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( )... Network transfer and server-side storage of these participants will be able to access elements, true...
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