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CloudKit sharing is made possible primarily by the CKShare class. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. Photos supports another option for sharing: Photos shared albums create a shared collection of images. Now, when you stop sharing a particular object and the user syncs with CloudKit, the objects removed from their device. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. 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. Our users need all of that information so that they can make good decisions about the objects they choose to share. We and our partners use cookies to Store and/or access information on a device. Each participant will also have their own collection of devices. In many cases, it can infer where records belong based on the relationship they have to other objects. rev2023.3.1.43269. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. I'll tap the Action button to bring up the sharing controller, but this time, I want the share to be read-only so that the participants can't edit or modify the contents of the share. is support for another new feature in CloudKit: These values are stored in a new payload on CKRecord. Heather, Jermaine, Percy, and Mary are all test accounts. 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. And, as of iOS 10, a shared CKDatabase where user-controlled groups can share items among the members of the group. 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. CloudKit operations provide superior control over the details of how CloudKit does its work and, perhaps more importantly, really force the developer to think carefully about network behaviors central to everything CloudKit does. In this post, we will talk about zone sharing. Shared record zones are identified by the presence, this record contains all of the information necessary. At the top right is the edit button, which presents a modal to edit your destinations caption and description. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. The first is the notion of a set of actors. For example, this user may have a private zone. Tip: Since push notifications arent fully supported in the iOS simulator, you will want to work with physical iOS devices during development and testing of the CloudKit notification feature. Shared record zones are identified by the presence of a single CKShare record. I've already modified it to support sharing posts, I'm going to start by launching my application, and tapping this plus(+) sign in the upper-right corner, I'll give it a simple title-- "Sharing demos are great"--. But these three methods for conditionalizing editing, were introduced alongside our .public database support, You can use these methods in your applications. This is a thorny problem with many gotchas and pitfalls, but users expect the feature, and expect it to work well. The CKFetchRecordsOperation operates on one or more records at a time. For more information, check Apples video on Build apps that share data through CloudKit and Core Data. Within this handler, the CKShare object must be created and saved as outlined in the previous section. Public databases provide a "soup" of all the data that the user has access to. The first step is to create a method that prepares your shared data. informative user interfaces for our users. and the participants entry for Jermaine shows. However, CloudKit gives you the tools you need for this. I'll open Mail and tap the link inside the email I sent, And exactly how much did I have to change, Sharing is by far the most complicated feature. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Tap the shared object to go to the detail screen. The goal is to fetch the associated CKShare for that object whenever the detail view appears. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. It's been my pleasure to introduce just some of the changes we've made to NSPersistentCloudKitContainer to support sharing. Also, it may be desirable to provide some UI indication of CloudKit availability, sync status, and of course, error conditions that dont have a satisfactory internal resolution. CloudKit sharing provides a way for records contained within a private database to be shared with other app users, entirely at the discretion of the owner of that database. These silent pushes happen entirely without user visibility or interaction, and as a result, dont require the user to enable push notification for your app, saving you many potential user-experience headaches as an app developer. Prior to the release of iOS 10, the only way to share CloudKit records between users was to store those records in a public database. share NSPersistentCloudKitContainer between app and extension, Core Data sharing with CloudKit: Unable to Accept Share. How might we build an experience like this? persistentContainer calls this method. Manage Settings Once the CloudKit schema is pushed to production, we can't change any of the field types. Hiring? Below the Data section, click Records. Add the following method to your extension: With this code in place, you can determine if the destination is already shared and then take the proper action. Another user will see a different set of zones in their .private and .shared databases, depending on whether or not they are the owner of those zones. 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. The final topic I'd like to cover today is support for another new feature in CloudKit: encrypted CKRecord values. For example purposes, I included a basic sanity check to make sure I am updating the correct record, and then update the fields and notify the delegate that we have new data. Fetching a record by name is very straightforward. Select Private Database. I can see my new album with the photo I shared. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive Add the following modifier to the Button: The edit button is now disabled, unless you have read/write permissions for this data. Sync user data between multiple apps from the same developer. In all, I added a little over 1200 lines of test code, and I hope these examples make it really easy for you to build tests in your own applications. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate. The same note fields for text and modified datetime can be stored locally in a file via NSKeyedArchiver or the like, and the UI can provide near full functionality based on this local copy. was to tell NSPersistentCloudKitContainer. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. Owners create and share objects with a set of participants. Second, enable the iCloud capability in your app. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate what objects are shared, who they're shared with, and what those participants can do. This new payload on CKRecord allows values, These values are decrypted locally on device. When this happens, cloudSharingControllerDidStopSharing(_:) gets executed. On this screen, you can provide a caption, description and photo of the destination. So I'll change the share options to mark the share as View Only. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. 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. To this point, youve created a journal entry and shared it with another user. Note also, I am using a CKQuerySubscription with a very simple always true predicate to watch for changes on the one (and only) Note record. the main reason the SharingProvider exists: testing. Hi. The exact version of the record you tried to save. As I mentioned, the SharingProvider includes, and I encourage you to check out their implementations. 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. directly to specific call sites in my application. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. 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. The owner is the iCloud account that actually owns an object. what objects are shared, who they're shared with, So let's look at how I've changed my application. 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. Go to the first device you created the share from, because you need to be the Owner to access the Share Options. to communicate these states and privileges. Did you figure it out? Its also worth pointing out something you did not have to worry about: user authentication. Last, if the current user of that share is the owner, returns. if the provided objectID is in sharedObjectIDs. Launch a simulator. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. It's called the SharingProvider. Next, we'll take a deep dive into the mechanics of sharing. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. Jordan's line about intimate parties in The Great Gatsby? The answer is, "Not much." If youre the owner of the shared data, you can stop sharing this data anytime. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. In a new payload on CKRecord and I encourage you to check their. 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