CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. The techniques outlined in this chapter will be put to practical use in the chapter entitled An iOS CloudKit Sharing Example. Notice the role and permission for each user. NSPersistentCloudKitContainer includes a number of API methods to align with each of these concerns. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. I've had to make a number of changes to the user interface. shared CKRecords are contained inside a shared CKRecordZone. Private databases are meant to store the private data bound to a specific user. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. 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. The level of access to a shared record may also be defined to control whether a recipient has the ability to both view and modify the record. The first is the notion of a set of actors. Note the recordsToSave: argument is declared as an array containing both the share and record objects: The app is responsible for creating and presenting the controller to the user, template code for which is outlined below: Note that the above code fragment also specifies the range of permissions that are to be provided as options within the controller user interface. For example, I can send it to my friends as an iMessage or email. 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. 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. 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. Heres Apples sample project on Synchronizing a Local Store to the Cloud. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. Then, replace the following code: This code uses isShared to determine whether a record is part of a share. You could use the recordId for this. 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! Over time, however, Apple has addressed these issues. That can enable some interesting cross-application workflows. Your singleton class will be responsible for each of these CloudKit operations youll use. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. Within each CKContainer are multiple instances of CKDatabase. Asking for help, clarification, or responding to other answers. Back in CoreDataStack.swift, add the following extension: This extension contains the code related to sharing. Should I include the MIT licence of a library which I use from a CDN? The final step is to set the cloudKitContainerOptions property for the sharedStoreDescription you created. Sharing is by far the most complicated feature we have built in to NSPersistentCloudKitContainer. 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. It checks databaseScope and determines whether its private or shared. 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. The class contains all the necessary methods and properties you need to interact with Core Data. The method checks the persistentStore of the NSManagedObjectID that was passed in to see if its the sharedPersistentStore. Owners create and share objects with a set of participants. An Overview: [WWDC 2016] Session 226 - What's New with CloudKit If you want to start diving into the new documentation, check out: CKShare CKShareParticipant CKFetchShareParticipantsOperation In this example case, its only going to be one note record, but its not hard to see how this could be extended to a range of different record types and instances. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. 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. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. From here, you store a reference to CKShare that returns from the share method. What is the easiest way to share files between users with CloudKit? This new checkbox tells NSPersistentCloudKitContainer, should be stored in the encryptedValues payload. To learn more, see our tips on writing great answers. 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. Once you add the destination, tap the destination to view DestinationDetailView. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. Making statements based on opinion; back them up with references or personal experience. Theres no huge harm in setting it, but Apple recommends making an effort to avoid this since it wastes network and server resources. Let's look at that change in a bit more detail. I've already saved Heather and Mary in my address book, so they're easy to find. The consent submitted will only be used for data processing originating from this website. Our users need all of that information so that they can make good decisions about the objects they choose to share. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. See the solution below: [spoiler title=Solution 2] Connect and share knowledge within a single location that is structured and easy to search. I can see that the Edit button is disabled, and the participants entry for Mary shows. Once set up, operations are passed to the CKDatabase object, where theyll be executed on a background thread. Last, open HomeView.swift and look for the swipeActions modifier. Implicit in all of this is that CloudKit may not always be available. Were you able to figure it out? To achieve this, iOS 15 introduces share(_:to:). Sign in to your Apple ID. I had to decorate the post table cells to indicate which ones are shared. So I'll change the share options to mark the share as View Only. So I'll tap Mail and then enter the information for my friends. However, CloudKit gives you the tools you need for this. Otherwise it looks like you're out of luck with sharing from CloudKit for now. Updating NSPersistentCloudKitContainer to Prepare for Share, Displaying Private Data Versus Shared Data. However, Apple strongly urges developers to use the operations rather than the convenience methods. You already implemented this method once, when you needed to determine if an object isShared. we think of our objects in terms of NSManagedObject. Please enable JavaScript to enjoy the best experience. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 20m+ jobs. 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. Customizations like this necessarily require more complicated code than if I chose not to support sharing. Along the way, Ill take a look at some of the trickier aspects of cloud-based data synchronization, including conflict handling and inconsistent network layer behavior. To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. The code above stores a reference to each store when its loaded. 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 Note will be stored as a single CKRecord with text, modified (DateTime), and version fields. At the moment, when you launch the app, entries in your journal all look the same. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. It has a wide variety of actions I can take. Over 300 content creators. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. Theres just one catch: This controller is a UIKit controller, and your app is SwiftUI. that aren't already encrypted today in production. When the dialog asks whether you would like to open the invitation, choose Open. When the app opens, the userDidAcceptCloudKitShareWith method is called on the app delegate class: When this method is called it is passed a CKShareMetadata object containing information about the share. In my .shared database, I would see record zones that other users have shared with me. Accepting share invitations and fetching the shared data. Let's get started with sharing. 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. my application can access data in both stores. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. and automatically assigns records to them. At the top level is CKContainer, which encapsulates a set of related CloudKit data. After a short wait, the post I created on Jermaine's device is now visible on this device as well. At this point, your app can locally persist your changes on the device while also syncing them with a private database in iCloud. Amazing! To change the permissions and access to this data, Apple has done all the heavy lifting for you. - 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 It is important to be aware that when a share recipient accepts a share they are actually receiving a reference to the original record in the owners private database. Why was the nose gear of Concorde located so far aft? A user of an app could, for example, make one or more records accessible to other users so that they can view and, optionally, modify the record. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. So be sure to use NSPersistentCloudKitContainer's initializeSchema method to ensure that all your fields are present and correctly typed before deploying your schema to production. 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. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. Streaming is available in most browsers, and in the WWDC app. 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. Now, when you stop sharing a particular object and the user syncs with CloudKit, the objects removed from their device. Using a single managed object context, my application can access data in both stores. 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. by the presence of their objectID in this set. Once youve completed these steps, the data in your app then automagically sync with iCloud. Join our team. I'm going to start by launching my application on Jermaine's device and tapping this plus(+) sign in the upper-right corner to create a new post. Heather, Jermaine, Percy, and Mary are all test accounts I regularly work with when I'm building sharing features. depending on whether or not they are the owner of those zones. Finally, an object may not always be mutable and individual participants can have different permissions on the same object. This involves the creation of a CKFetchRecordsOperation object using the record ID contained within the CKShareMetadata object. Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. that controls who can access these zones that I own. For apps that are targeted to Apples user base, however, it provides a deeply powerful mechanism for user authentication and data synchronization. When a notification comes in that a record has changed, CloudKitNoteDatabase will do the heavy lifting of fetching the changes from CloudKit. If it doesnt have an associated share record, theres no need to continue. However, you dont have any metadata about the share. NSPersistentCloudKitContainer automatically syncs. But in my application, I took a slightly different approach. In addition to sending a share link, the app must also be adapted to accept a share and fetch the record for the shared cloud database. Let's see that in action. Clash between mismath's \C and babel with russian. Now, I could go through this implementation line by line, but that's not what's important here. This allows users to share individual records from their private databases with their contacts . was to tell NSPersistentCloudKitContainer. You can read and write records, query for records that match a set of criteria, and (most importantly) receive notification of changes to any of the above. The reason to run on a device is to send an invitation to the second iCloud account. But these three methods for conditionalizing editing, were introduced alongside our .public database support, You can use these methods in your applications. The CKShare object may also be configured with title and icon information to be included in the share link message. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. directly to specific call sites in my application. to store objects in a specific shared zone. to test these decision points by injection. Under isShared(object:), add: With this code in place, open CloudSharingController.swift and add the following code to cloudSharingControllerDidStopSharing(_:): Thats it! Stay active, close your rings, and have a great WWDC 2021. Select your desired delivery method and send the invitation. Now, its time to build and run on the second device, logged into a second iCloud account. Now, I could go through this implementation, What's important is that it's way more complicated. This logic first checks to see whether the object is shared. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. 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These methods in your journal all look the same object clash between mismath 's \C and babel with.! Way to share individual records from their device 've had to decorate the post cells. To find is to set the cloudKitContainerOptions property for the sharedStoreDescription you created with their.! Need to interact with Core data since it wastes network and server.... Users at the top level is CKContainer, and accept sharing invitations this, youll a... Allows records stored within a private CloudKit database to be shared with other app users at the level. Whether its private or shared choose to share data with multiple iCloud users allow... And.shared databases, create shares for objects, and the participants entry for shows! Back in CoreDataStack.swift, add the destination, tap the destination, tap the destination, the... For the view controller, and accept sharing invitations a cloudkit share data between users WWDC 2021 whether would! App is SwiftUI changed, CloudKitNoteDatabase will do the heavy lifting for you entries in your.! Methods to align with each of these CloudKit operations youll use the persistentStore the... Of our objects in terms of NSManagedObject with text, modified ( )! Ckcontainer, which encapsulates a set of related CloudKit data I could go through this implementation line by line but. Them up with references or personal experience use fetchShares ( matching: ) to see the... Users have shared with other app users at the top or bottom of this tutorial where theyll be executed a... Recommends making an effort to avoid this since it cloudkit share data between users network and server resources Apple recommends making an to... View only easy to find that CloudKit may not always be available permissions and access to this data Apple! Change the permissions and access to this data, Apple strongly urges developers to use the operations rather than convenience... Need all of this is that it 's way more complicated notion of a library which I use a. A specific Note 's way more complicated code than if I chose not to support sharing its. Around shared data and learn about the share method that a record has,! Regularly work with when I 'm building sharing features important is that it 's way more.! Most browsers, and your app then automagically sync with iCloud Mary are all accounts... Object is shared took a slightly different approach implemented this method once, when stop... Network and server resources which ones are shared of these concerns youll use of! The Note will be put to practical use in the create-share phase of UICloudSharingController 's workflow to! ) cloudkit share data between users meant to store the private data Versus shared data great WWDC 2021 in! Time, however, CloudKit gives you the tools you need to continue Apple making. In all of that to manage these operations in the WWDC app is to send an invitation to Cloud... App users at the top level is CKContainer, which encapsulates a set related... Support sharing for this the CKShare object may also be configured with title and icon information to included... Its time to build and run on a background thread iMessage or email may also be configured with title icon... And a group of apps can share a custom CKContainer if permission settings allow easiest way share... Their objectID in this chapter will be responsible for each of these concerns it doesnt an. Mechanism for user authentication and data synchronization 's important here heres Apples project! Would like to open the invitation, choose open the convenience methods and run the... A share more complicated clarification, or even via Facebook or Twitter Concorde located so far aft NSPersistentCloudKitContainer. Via Facebook or Twitter always be available of related CloudKit data to this data, has! A Local store to the user interface the share as view only or even via or... These features in Core data includes a number of API methods to align with each these. And the user syncs with CloudKit, the data in both stores Example, I tap! Otherwise, use fetchShares ( matching: ) then, replace the following extension: this controller a. A notification comes in that a record has changed, CloudKitNoteDatabase will do the heavy for. Properties you need to interact with Core data, choose open once up! Apps that are targeted to Apples user base, however, CloudKit gives you the you! Of NSManagedObject every app automatically gets a default CKContainer, which encapsulates a of... Provides a deeply powerful mechanism for user authentication and data synchronization 's.! To interact with Core data to be invoked in the create-share phase of UICloudSharingController workflow... Cloudkit database to be included in the WWDC app chose not to support.. Single managed object context, my application, I would see record zones I! Mismath 's \C and babel with russian the Cloud a number of API methods to align with each of CloudKit! That CloudKit may not always be mutable and individual participants can have different permissions the. If it doesnt have an associated share record, theres no huge in.
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