2 Answers Sorted by: 8 In iOS 10 / macOS 10.12, it is now possible to share hierarchies of records in a user's private database with other users. From this screen, you can take a few actions. Enter a topic above and jump straight to the good stuff. CloudKit provides much more functionality on top of this, especially for sophisticated data models, public sharing, advanced user notification features, and more. Kodeco requires JavaScript. It is capable of handling large file transfers seamlessly. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. Since CloudKit is deeply tied to Apples operating systems and devices, its not suitable for applications that require a broader range of device support, such as Android or Windows clients. Finally, I'll tap Send to send the email. It may be tempting to think that the above is a completely robust data sharing solution, but its not quite that simple. Saving records is, perhaps, the most complicated operation. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. of shared objects without ever talking to the CloudKit server. 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. Should I include the MIT licence of a library which I use from a CDN? And finally, I had to build new user interface elements to display information about the participants on an individual share. For example, this user may have a private zone and a shared zone that they own in their .private database. In particular, following the release of the CloudKit SDK in 2014, third-party developers have a fully-featured, robust technical solution to cloud-based data sharing between devices (including macOS applications and even web-based clients.). We've enabled adoption of encrypted values. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. to instantiate an instance of UICloudSharingController. The next step of preparing your shared data is to enable storing your data in iCloud. 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. Once youve completed these steps, the data in your app then automagically sync with iCloud. First off, you need to make sure youre starting from a valid CKRecord. On Apple platforms, there are a number of ways we can share the data our applications create. Participants can have different roles and permissions that constrain how they can act on a particular set of objects, which brings us to the second key concept: how NSPersistentCloudKitContainer and CloudKit structure these shared objects. NSPersistentCloudKitContainer typically manages a private zone. These days, modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. 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. 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. With NSPersistentCloudKitContainer, applications can operate on shared objects from any Apple device. Here, youll add the code to accept the share. Build and run. after they're downloaded from the CloudKit server. Notice your shared record now has an icon indicating its shared with other users. To this point, youve created a journal entry and shared it with another user. If necessary, you then pass the updated server record to CloudKit to write the new record. However, as a practical matter, it makes sense to use some sort of change coalescing mechanism, such as a background Timer that fires periodically, to avoid spamming the iCloud servers with too many tiny changes. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. Its intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift. But ideally, we would have a single place directly in the Photos app where my friends and I can share our photos with each other. Each of these is mirrored to a persistent store. Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. And here on the table, I have a small pool of devices with me, each logged in to an iCloud account belonging to Heather, Jermaine, or Mary. The version field is simply an illustration of good practice for upgrade proofing, keeping in mind that a user with multiple devices may not update your app on all of them at the same time, so there is some call for defensiveness. Before you do that, consider one small caveat: Only the objects that arent already shared call share(_:to:). See the solution below: [spoiler title=Solution 1] CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. But in my application, I took a slightly different approach. Go to the first device you created the share from, because you need to be the Owner to access the Share Options. If youre the owner of the shared data, you can stop sharing this data anytime. share NSPersistentCloudKitContainer between app and extension, Core Data sharing with CloudKit: Unable to Accept Share. We and our partners use cookies to Store and/or access information on a device. As I mentioned, the SharingProvider includes a number of other important methods for the sample application, and I encourage you to check out their implementations and the tests I wrote for how they impact the user interface. For our purposes, a single view application containing a UITextView with the ViewController as its delegate will suffice. I adopted a new method on NSPersistentCloudKitContainer to create the share. Select recordName from the list and ensure the index type is Queryable. However, CloudKit gives you the tools you need for this. At the top level is CKContainer, which encapsulates a set of related CloudKit data. But this isn't how NSPersistentCloudKitContainer works. In the projects settings, set the signing team to your paid developer account. Learn SwiftUI and take your iOS Development to the Next LevelSwiftUI Essentials iOS 16 Edition book is now available in Print ($39.99) and eBook ($29.99) editions. This class is initialized with the root CKRecord instance that is to be shared with other users together with the permission setting. shared CKRecords are contained inside a shared CKRecordZone. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive You ask CloudKit if theres already a record there, and if not, you create a new local CKRecord to use for the subsequent save. For SQLite-backed stores, Core Data provided ubiquitous persistent storage. To understand these challenges a bit more clearly, we need to identify two crucial concepts for sharing. 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. For more information, check Apples video on Build apps that share data through CloudKit and Core Data. 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. Its fair to say iCloud got off to a bit of a rocky start. For this example, youll use CKAsset to store the note text. On the other hand, this injection technique makes it easy and fast to test different configurations of shared objects without ever talking to the CloudKit server. If theres no error, the title of the share is set. If you have any questions or comments, please join the forum discussion below. See the solution below: [spoiler title=Solution 2] Otherwise it looks like you're out of luck with sharing from CloudKit for now. If you attempt to select record type as CD_Destination and query records from here, you receive an error stating Field recordName isnt marked queryable. based on the relationship they have to other objects. In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. CloudSharingView conforms to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can use it in SwiftUI. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Once youre in this section, you need to specify the container you want to see. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. After adding a few of these customizations, it became obvious I needed a way to ensure they all work correctly, which brings me to the main reason the SharingProvider exists: testing. The actual CKRecordID is a bit more complicated in that it includes the zoneID. Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. And you can see it's a bit more complicated than the simple injection I used in the test. The CKShare object may also be configured with title and icon information to be included in the share link message. Shared: Data stored here is shared between the private databases of other signed-in users. and automatically assigns records to them. Add the following method to SceneDelegate: This code first gets a reference to the sharedPersistentStore that you created in the beginning of this tutorial. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate. [/spoiler]. Find centralized, trusted content and collaborate around the technologies you use most. Unlike iCloud, CloudKit does have the option to have public data available to anyone who uses the app. In addition to this, you set databaseScope to .shared. On Mary's device, I'll accept the new share, and now I can see the new post. and how to operate on records and objects. 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