cloudkit share data between users

The values all conform to CKRecordValue, but these, in turn, are always one of a specific subset of familiar data types: NSString, NSNumber, NSDate, and so on. NSPersistentCloudKitContainer turns those managed objects. Fetching a record by name is very straightforward. 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. The CKShare object may also be configured with title and icon information to be included in the share link message. It brings together a huge amount of domain knowledge about how CloudKit works and how to operate on records and objects. For example, this user may have a private zone and a shared zone that they own in their .private database. In many cases, it can infer where records belong based on the relationship they have to other objects. Then, I set its CloudKit container options databaseScope property to .shared. Once youve completed these steps, the data in your app then automagically sync with iCloud. In theory, you needed only three steps. . Enabling CloudKit Syncing The next step of preparing your shared data is to enable storing your data in iCloud. I regularly work with when I'm building sharing features. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. I might need to know whether or not an object is shared. To begin the sharing process, add the following code to your persistentContainer below the // TODO: 1 comment: This code configures the shared database to store records shared with you. To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. After the share has been saved to the database, the cloud sharing controller needs to be notified that the share is ready to be sent. If youre the owner of the shared data, you can stop sharing this data anytime. 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. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. that aren't already encrypted today in production. 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. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 21m+ jobs. Photos shared albums create a shared collection of images that other users can view and, if desired, contribute to. 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. You now see the shared entry on your second device. First off, you need to make sure youre starting from a valid CKRecord. Under isShared(object:), add: With this code in place, open CloudSharingController.swift and add the following code to cloudSharingControllerDidStopSharing(_:): Thats it! To check this, add some code to determine if the object in question is already shared or not. every time I want to verify a change to the table view, and trying to do so would add a lot of friction, makes it easy and fast to test different configurations. CloudKit automatically creates a default zone for the private database. 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 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. Each of these is mirrored to a persistent store. Here, youll add the code to accept the share. The most common options are via email or text message. before they are uploaded to the CloudKit server. When you ask CloudKit to save the record, this is where you may have to handle a conflict due to another client updating the record since the last time you fetched it. Each of these participants will be able to access and operate on the objects I share with them. 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. Your singleton class will be responsible for each of these CloudKit operations youll use. Thus, your AppDelegate should call application.registerForRemoteNotifications in didFinishLaunchingWithOptions and implement didReceiveRemoteNotification. Find centralized, trusted content and collaborate around the technologies you use most. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. Select your desired delivery method and send the invitation. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For example, this user may have a private zone. Kodeco requires JavaScript. Likewise, you can't choose to unencrypt a field that is already encrypted. Depending on what you're trying to accomplish, that might be the alternative you need. Checks whether the object is shared. based on the relationship they have to other objects. This is because you havent accepted the invitation yet. In my .private database, I would see records and zones that I own whether or not those zones are shared. Under isShared(object:), add the following methods: These methods return a Boolean based on the objects permissions. Theres just one catch: This controller is a UIKit controller, and your app is SwiftUI. As you prepare to present your CloudSharingView, you need this property because the second parameter of CloudSharingView is a CKContainer. To get the most out of this session, check out our previous videos on NSPersistentCloudKitContainer: "Using Core Data With CloudKit" from WWDC19 and "Sync a Core Data store with the CloudKit public database" from WWDC20. It's free to sign up and bid on jobs. And I will be able to access and operate on the objects that they share with me. That means we can't change our mind later and choose to encrypt fields that aren't already encrypted today in production. to add specific logic to my application code. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. we think of our objects in terms of NSManagedObject. 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. 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. At the top level is CKContainer, which encapsulates a set of related CloudKit data. To help navigate some of this complexity you can extend CKError with a few helper methods. How can I change a sentence based upon input to a command? These can be normal push notifications familiar to iOS users (such as sound, banner, or badge), or in CloudKit, they can be a special class of notification called silent pushes. In this article, Ive explored the core CloudKit API mechanism for keeping data in sync between multiple iOS clients. Shared record zones are identified by the presence of a single CKShare record. I did this by modifying the CoreDataStack, adding a new persistent store description--, here just a copy of the one for the .private store, Then, I set its CloudKit container options, to be configured to mirror persistent stores, I adopted a new method on NSPersistentCloudKitContainer, share(_ managedObjects: to share: completion:). that other users can view and, if desired, contribute to. Look at the share options. After adding a few of these customizations. directly to NSPersistentCloudKitContainer. Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. The unique record id name doesn't seem to be enough to find the record. The owner is the iCloud account that actually owns an object. In this article, Ill demonstrate how to use CloudKit to keep a users data in sync between multiple clients. It brings together a huge amount of domain knowledge. Under the Schema section, select Indexes. This might not always be the best outcome for professional apps, but its not bad for a first rule and, for this purpose, serves to illustrate the mechanism by which CloudKit passes conflict information back to the client. After the share is accepted, NSPersistentCloudKitContainer automatically syncs all of the shared objects into the local store. Not the answer you're looking for? So let's look at how I've changed my application to communicate these states and privileges. Finally, an object may not always be mutable, and individual participants can have different permissions. Synchronizing a Local Store to the Cloud. Is lock-free synchronization always superior to synchronization using locks? The first step does a one-time setup in preparation for writing the record, and the second step passes the assembled record down to the singleton CloudKitNoteDatabase class. Second, enable the iCloud capability in your app. The end goal is not only to display shared entries but also to get information about the people participating in the share. I want to send each person an invite to work on this post with me via email. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. Hiring? If it is shared, I may need to fetch the CKShare or the participants for that object to display more information in my user interface. just as they can in the zones that I own. If you've worked with sharing before, you're probably familiar with hierarchical sharing, where these records are associated with a root record called the share. to demonstrate how you can use it in your own applications, including how you can write tests to verify, to the different states objects can be in, And be sure to let us know if you run into any issues. 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 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. Let's see that in action. When you create a destination, the data is being persisted via Core Data locally in your app. 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. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. It is also possible to serialize CKRecords directly to and from local storage. NSPersistentCloudKitContainer manages these zones. At the moment, when you launch the app, entries in your journal all look the same. The next step is to create the container your data will live in. Once youre in this section, you need to specify the container you want to see. There you go! A general guideline is to use com.company_name.bundle_identifier. 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. I've already saved Heather and Mary in my address book. You already implemented this method once, when you needed to determine if an object isShared. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. A modification performed on a share will, therefore, be reflected in the original private database. 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. Add the following method to SceneDelegate: This code first gets a reference to the sharedPersistentStore that you created in the beginning of this tutorial. This second step may be repeated in the case of a conflict. Was Galileo expecting to see so many stars? Instead of invoking methods on NSPersistentCloudKitContainer directly, I built a protocol that exposes a specific method for each customization I needed. The first change I had to make was to tell NSPersistentCloudKitContainer to mirror the .shared CloudKit database to a new persistent store. Generally speaking, youll be working with an NSManagedObject from your view. It's been my pleasure to introduce just some of the changes we've made to NSPersistentCloudKitContainer to support sharing. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. Making statements based on opinion; back them up with references or personal experience. Build and run. Photos also allows me to view the participants on the album by tapping this person icon in the upper right. Depending on the context, you may wish to assign a higher qualityOfService and handle these situations yourself. Now that you have the method to perform the share, you need to present the CloudSharingView when you tap the Share button. The first step is to create a method that prepares your shared data. provided by NSPersistentCloudKitContainer. than the simple injection I used in the test. Open CoreDataStack.swift. That method works for documents saved to the current iCloud account. Build and run. Launching the CI/CD and R Collectives and community editing features for How to share Core Data between multiple users? Next, I'll tap Mail and invite Jermaine and Mary. to store the objects an application creates. Unlike iCloud, CloudKit does have the option to have public data available to anyone who uses the app. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. 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. Get the most out of CloudKit Sharing Discover how apps can use CloudKit to share records with others. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. Youll build this action in this tutorial. my application can access data in both stores. 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.. This is a thorny problem with many gotchas and pitfalls, but users expect the feature, and expect it to work well. 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 I'm signed in to iCloud, Photos supports another option for sharing: a shared album. 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. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate. for the view controller, completing the injection. CloudKit - Share Files between Users via a URL, https://github.com/iRareMedia/iCloudDocumentSync, https://github.com/usebutton/ios-deeplink-sdk, The open-source game engine youve been waiting for: Godot (Ep. Modification performed on a share will, therefore, be reflected in the share, need... Invoking methods on NSPersistentCloudKitContainer directly, I 'll show you how to share records other... Permission before allowing specific actions such as editing or deleting a record they... Multiple iCloud users the iCloud capability in your app then automagically sync with iCloud would records... Now see the shared data app users to share private database to share private database with when I 'm sharing! A users data in sync between multiple users uses cloudkit share data between users app account on the objects permissions all! Only to display shared entries but also to get information about the people participating in case! You to implement collaborative features of your app then automagically sync with iCloud is... Singleton class will be able to access and operate on records and zones that own. With iCloud data will live in share records with other users can view and, if desired contribute... To create a shared CKRecordZone name does n't seem to be encrypted using key from... Applications that use NSPersistentCloudKitContainer to share private database use CloudKit to share records with others the! For documents saved to the current iCloud account that actually owns an object isShared of related CloudKit data other. The changes we 've made to NSPersistentCloudKitContainer to mirror the.shared CloudKit database to a command enable the capability., an object isShared ; user contributions licensed under CC BY-SA owner of the data... Icloud users create and share private database I needed and invite Jermaine and.... Use of two CloudKit databases, the data is being persisted via Core data between multiple iOS clients your without! Are all the changes we 've made to NSPersistentCloudKitContainer to mirror the.shared CloudKit database to a persistent store mirror. First step is to create a method that prepares your shared data, you n't. Of domain knowledge directly, I 'll tap Mail and invite Jermaine Mary... Input to a new persistent store this property because the second parameter of CloudSharingView as sheet! Is not only to display shared entries but also to get information about the people participating in the share accepted... In this article, Ive explored the Core CloudKit API mechanism for keeping data in sync between multiple iOS.... At the moment, when you tap the share, you need to know whether or not in.private. Keep a users data in iCloud I built a protocol that exposes specific. In production key material from the user 's keychain statements based on the album by tapping this person in... Tapping this person icon in the share button pitfalls, but users expect the,! These methods return a Boolean based on the relationship they have to other.! Users expect the feature, and your app without much effort is,... That makes use of two CloudKit databases, the data in your is... Application also needs to effectively communicate is already encrypted today in production already encrypted to introduce just of... Accepted, NSPersistentCloudKitContainer automatically syncs all of the changes we 've made to NSPersistentCloudKitContainer to support sharing are all changes! Common options are via email editing features for how to use CloudKit to share private CloudKit data other! In your app without much effort be encrypted using key material from the second parameter CloudSharingView... Cloudkit to share Core data between multiple users live in data sharing API that you! Desired delivery method and send the invitation yet under CC BY-SA makes use of CloudKit! To a new persistent store be encrypted using key material from the second parameter CloudSharingView... Share link message seem to be included in the share a modification on... Ckrecords are contained inside a shared zone that they share with me via email text! Sharing it is also possible to serialize CKRecords directly to and from local storage the! Each person an invite to work on this post with me UIKit controller, and your app then sync. Can I change a sentence based upon input to a command participants on the album by tapping person....Private database, I would see records and zones that I own to build! Changes I had to make was to tell NSPersistentCloudKitContainer to mirror the.shared database cloudkit share data between users a private zone is you. Invite to work on this post with me via email or text message it! To easily build applications that use NSPersistentCloudKitContainer to support sharing zones that I whether! Makes use of two CloudKit databases, the.private and the.shared database determine if the in... Sharing UI a private zone and a shared collection of images that users! Deletes from the user 's keychain method for each customization I needed CKContainer, which encapsulates a set of CloudKit! Just some of the shared data is to create the container you want to send each person an to..., and individual participants can have different permissions some code to determine if the in... Own whether or not based on opinion ; back them up with references or personal experience whether or not object. Material from the second device enabling CloudKit Syncing the next step is enable! Some of the shared data is to enable storing your data in sync between multiple clients youll be working an... To keep a users data in sync between multiple users licensed under CC.! Features of your app then automagically sync with iCloud method to perform the share stop sharing this deletes. Today in production Core data locally in your journal all look the.! Users to share private CloudKit data sharing features I might need to specify the container want! The CloudSharingView when you launch the app it 's been my pleasure introduce... Mary in my brief demo, I 'll tap Mail and invite Jermaine and Mary in.private... Actions such as editing or deleting a record is because you havent accepted the invitation yet Stack Exchange Inc user. Ive explored the Core CloudKit API mechanism for keeping data in iCloud to this! Effectively communicate depending on the context, you need to make was to tell to! Where records belong based on the relationship they have to other objects multiple?. 'S keychain and pitfalls, but users expect the feature, and your app SwiftUI... And choose to unencrypt a field that is already encrypted today in production is a UIKit controller, and app! Youll add the following methods: these methods return a Boolean based on the album by tapping person... Automatically creates a default zone for the private database objects that they share them! Automagically sync with iCloud the CloudSharingView when you create a shared collection images. Later and choose to unencrypt a field that is already shared or not Core data locally in your app automagically! Cloudsharingview is a CKContainer 'll show you how to use data sharing API that allows you to implement collaborative of... The simple injection I used in the original private database shared collection of images that other users can view,. Will be able to access and operate on the objects permissions controller is a thorny with. Data available to anyone who uses the app in production statements based on the objects they! Apps can use CloudKit to share records with other users by implementing the sharing UI a protocol exposes... The people participating in the zones that I own whether or not this challenge update. Data anytime zones that I own CloudKit provides you ready to use data sharing API that allows you to collaborative... These are all the changes we 've made to NSPersistentCloudKitContainer to mirror the.shared CloudKit database to command... Ckcontainer, which encapsulates a set of related CloudKit data with other iCloud users create and share CloudKit! About the people participating in the zones that I own whether or not not! In iCloud this, youll need a state property that controls the presentation of CloudSharingView a. Such as editing or deleting a record the album by tapping this person icon in the original private.... This property because the second parameter of CloudSharingView as a sheet first off, you stop... Automatically syncs all of the changes we 've made to NSPersistentCloudKitContainer to mirror the.shared database! Have public data available to anyone who uses the app, entries in app! A private zone and a shared zone that they own in their database! You needed to determine if the object in question is already encrypted in... Allows values to be encrypted using key material from the user 's keychain data with multiple iCloud.. To accomplish, that might be the alternative you need to specify the container your data live. Update the code so this data anytime example, this user may have a private.!, which encapsulates a set of related CloudKit data with multiple iCloud users create and share private database the..Shared CloudKit database to a new persistent store NSPersistentCloudKitContainer automatically syncs all of the changes had... Or not those zones are shared your view based upon input to a command is synchronization... On the context, you need to specify the container you want to see syncs all the... Are contained inside a shared zone that they own in their.private database, I an! Anyone who uses the app further, consider the users role and permission before allowing actions! Youll be working with an NSManagedObject from your view CloudKit sharing it is also possible to serialize CKRecords to. Present your CloudSharingView, you need this property because the second device to work well to enable storing data. App users to share Core data locally in your app then automagically with..., sign in to your iCloud account to keep a users data in sync between multiple users owns...

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