cloudkit share data between users

Please enable JavaScript to enjoy the best experience. Click Query Records to see a listing of the record(s) you created in the app earlier! NSPersistentCloudKitContainer manages these zones. that allows me to call up an Action sheet. In this post, we will talk about zone sharing. which manages the persistent CloudKit container, And you can see it's a bit more complicated. CloudKit is built on top of Apples iCloud service. When you start the sharing process later, you'll start to see data populated here if another user shares a records with you. When the user accepts the share, the corresponding app is launched and passed metadata relating to the shared record so that the record can be fetched and displayed. There are two ways to share data via CloudKit: record sharing and zone sharing. It's been my pleasure to introduce just some of the changes we've made to NSPersistentCloudKitContainer to support sharing. Select Private Database. NSPersistentCloudKitContainer manages these zones and automatically assigns records to them. But ideally, we would have a single place. 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. It comes with a Dictionary of contained CKErrors that deserve more careful inspection to figure out what exactly happened during a compound operation. CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. 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. 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. If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. to NSPersistentCloudKitContainer to support sharing. 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. The SharingProvider has methods for binding. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. These values are stored in a new payload on CKRecord called encryptedValues, introduced in the "What's New in CloudKit" session. and some of the permissions on the shared album. Open CoreDataStack.swift. Owners create and share objects with a set of participants. Thats it! Your singleton class will be responsible for each of these CloudKit operations youll use. 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. 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. 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. Sync user data between multiple apps from the same developer. 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. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. You now see the shared entry on your second device. In many cases, it can infer where records belong based on the relationship they have to other objects. However, such conflicts can arise from other circumstances. You see a travel journal screen with an empty state message and a button. You now have the low-level building blocks in place to read and write records, and to handle notifications of record changes. I'm Nick Gillett, an engineer here at Apple on the Core Data team. Sharing CKAssets between users with CloudKit? Finally, one of the most important aspects of any operation is the qualityOfService value. 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 app designer is always in the best position to define rules for these situations, which can include everything from context-aware automatic merging to user-directed resolution instructions. and modify records in these shared zones. I had to decorate the post table cells to indicate which ones are shared. Asking for help, clarification, or responding to other answers. This is your Destination entity in Core Data. Then, it sets the persistent store based on the scope. In anticipation of this, split the save function into two steps. 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. In fact, in a sense, youre recreating the convenience APIs. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate. 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. The first is the notion of a set of actors. Select recordName from the list and ensure the index type is Queryable. In the Signing & Capabilities section, add the iCloud capability. introduced in the "What's New in CloudKit" session. Tapping that brings up the set of participants. To change the permissions and access to this data, Apple has done all the heavy lifting for you. At the top level is CKContainer, which encapsulates a set of related CloudKit data. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. And I'd like to show you one specific call site. In addition, they would see my two zones that I share with them and any other zones they are a participant on in their .shared database. I simply give the new album a title and then tap Next to choose the set of participants. When I tap Next, I can see my new album with the photo I shared. Add the following modifier to the Button: With this code in place, only users with the proper permissions can perform actions like editing or deleting. Now I'm going to add a new post, give it a title, and tap Done. 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. Launch a simulator. Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. to test these decision points by injection. On Mary's device, I'll accept the new share, and now I can see the new post. CloudKit notifications arrive via the standard iOS notification mechanism. Let's see that in action. What's important is that it's way more complicated than I can easily exercise every time I want to verify a change to the table view, and trying to do so would add a lot of friction to the development process. Heather, Jermaine, Percy, and Mary are all test accounts. Look for the ToolBarItem that contains the Text("Edit") button. More importantly, you have a foundation for adding more advanced CloudKit functionality. bookmark, personalise your learner profile and more! I adopted a new method on NSPersistentCloudKitContainer to create the share. Update the selected zone from defaultZone to the automatically generated com.apple.coredata.cloudkit.zone. On Jermaine's device now, I'll accept the new share. Theres just one catch: This controller is a UIKit controller, and your app is SwiftUI. After you have logged into the console, open CloudKit Database. Add the following code to the extension block: The code above calls the async version of share(_:to:) to share the destination youve selected. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 21m+ jobs. In theory, you needed only three steps. I've already saved Heather and Mary in my address book. 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. For app developers, the situation was even worse. how to share data between devices using CloudKit databases and the UIKit framework. So that's how we use NSPersistentCloudKitContainer. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. In this article, Ill demonstrate how to use CloudKit to keep a users data in sync between multiple clients. This is because you havent accepted the invitation yet. Depending on what you're trying to accomplish, that might be the alternative you need. Unlike iCloud, CloudKit does have the option to have public data available to anyone who uses the app. Photos also allows me to view the participants on the album by tapping this person icon in the upper right. informative user interfaces for our users. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Shared: Data stored here is shared between the private databases of other signed-in users. Build apps that share data through CloudKit and Core Data Learn how to easily build apps that share data between multiple iCloud users with NSPersistentCloudKitContainer. Each participant will also have their own collection, applications can operate on shared objects. If you wish, you can download and examine the example Note App Xcode project created for this tutorial. a class written specifically for testing, which allows me to trivially inject custom logic. CloudKit - How to share multiple records and retrieve shared records? Now, youll resolve this error. As you prepare to present your CloudSharingView, you need this property because the second parameter of CloudSharingView is a CKContainer. Figure 48 3, for example, shows a share link loaded into the Mail app ready to be sent: When a user receives a share link and selects it, a dialog will appear providing the option to accept the share and open it in the corresponding app. When the user taps the link that was shared earlier and accepts the invitation, the delegate calls this method and launches the app. 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. and automatically assigns records to them. 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. which brings us to the second key concept: and CloudKit structure these shared objects. 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. Now that youve sent an invitation to your second user, you need to set the app to accept the invitation and add the data into the shared store. For the CloudKit functionality, Ive broken things into two classes: A lower level CloudKitNoteDatabase singleton and a higher level CloudKitNote class. Although this adds complexity to the client, its ultimately a far better solution than having Apple come up with one of a few server-side mechanisms for conflict resolution. 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. Participants can have different roles and permissions. For starters, a few custom errors can be defined to shield the client from the internals of CloudKit, and a simple delegate protocol can inform the client of remote updates to the underlying Note data. 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. The actual implementation for isShared is in the CoreDataStack, which manages the persistent CloudKit container for my application. With this code in place, navigate back to DestinationDetailView.swift to present CloudSharingView. 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. CloudKit app require a few items to be enabled on the Capabilities Pane of the Xcode Target: iCloud (naturally), including the CloudKit checkbox, Push Notifications, and Background Modes (specifically, remote notifications). share(_ managedObjects: to share: completion:) is a new method designed to pair directly with UICloudSharingController. At the top right is the edit button, which presents a modal to edit your destinations caption and description. we can share the data our applications create. Now, I could go through this implementation line by line, but that's not what's important here. Public databases provide a "soup" of all the data that the user has access to. in a way that facilitates this type of injection. directly to specific call sites in my application. It has a wide variety of actions I can take. 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. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. What is the easiest way to share files between users with CloudKit? When a user decides to share CloudKit data, a share link in the form of a URL is sent to the person with whom the data is to be shared. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. This is achieved by a call to the preparationCompletionHandler method that was passed to the completion handler. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign. Each of these participants will be able to access and operate on the objects I share with them. 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. where I needed to know whether or not an object is shared. Add a destination. Two separate iCloud accounts To initiate the sharing process. 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. Theres also a share action that does nothing now. For each participant, NSPersistentCloudKitContainer manages objects in two CloudKit databases, the .private and the .shared database. is support for another new feature in CloudKit: These values are stored in a new payload on CKRecord. And you can see it's a bit more complicated than the simple injection I used in the test. Once the CloudKit schema is pushed to production, we can't change any of the field types. Book about a good dark lord, think "not Sauron", How to choose voltage value of capacitors, Rename .gz files according to names in separate txt-file. Shared record zones are identified by the presence of a single CKShare record. But our applications are usually designed to manage large collections of data. 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. we think of our objects in terms of NSManagedObject. Instead of invoking methods on NSPersistentCloudKitContainer. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. The first step is to implement the UIKit scene delegate method windowScene(_:userDidAcceptCloudKitShareWith:). See the solution below: [spoiler title=Solution 2] To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. to add specific logic to my application code. 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. I get a Error Fetching Record error, even if I copy and paste it in. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. Were you able to figure it out? Download iOS 13.0+ iPadOS 13.0+ Xcode 13.0+ Mac Catalyst 13.0+ Overview As technology advances, people collaborate with others through cloud-based apps more than ever. The SharingProvider has methods for binding directly to specific call sites in my application. Subscriptions are one of the most valuable CloudKit features. 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. Swift 5.6 | iOS 15 | Xcode 13 Table of Contents Was Galileo expecting to see so many stars? Let's get started with sharing. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. Before CloudKit, inconsistent behavior and weak debugging tools made it almost impossible to deliver a top quality product using the first generation iCloud APIs. by the presence of their objectID in this set. 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. See that data now exists at the bottom in the Participants section. Also, the service itself must protect against a range of potential issues, such as unauthorized requests, conflicting changes, and the like. Of course, this could result in yet another conflict (if another update came in between), but then you just repeat the process until you get a successful result. Notice the role and permission for each user. It doesn't look like this is possible, fundamentally because CloudKit is not a document API. Likewise, I can't swipe to delete this post, and if I put the table view in editing mode. When you app is opened with such a link, then you can download the CKRecord and you will have the file in a CKAsset. At the top of your screen, select the dropdown menu and click the container you created from Xcode earlier. For example, I can send it to my friends as an iMessage or email. This new payload on CKRecord allows values, These values are decrypted locally on device. Why was the nose gear of Concorde located so far aft? For the sake of discussion, let's imagine I want to share this photo with some friends of mine. That means we can't change our mind later and choose to encrypt fields that aren't already encrypted today in production. Fetching a record by name is very straightforward. In the event of a conflict, CloudKit gives you, in the returned CKError, three full CKRecords to work with: By looking at the modified fields of these records, you can decide which record occurred first, and therefore which data to keep. Work of non professional philosophers a Error Fetching record Error, even if put. In my application also needs to effectively communicate prefixes your entities with CD to distinguish from. A UIKit controller, and you can see it 's been my pleasure to just... Can operate on the device youll be testing on a modal to edit destinations! Of CloudSharingView is a new payload on CKRecord called encryptedValues, introduced in the CoreDataStack, which manages the CloudKit. Defaultzone to the container you created in the participants, displayed at the top level is,... Device youll be testing on to present your CloudSharingView, you have logged into the console, open CloudKit.. A document API second parameter of CloudSharingView is a CKContainer clarification, or responding to other answers and done! 'S device, I 'll accept the new post, we will talk about zone sharing which brings us the... Xcode 13 table of Contents was Galileo expecting to see a travel screen. Between devices using CloudKit databases, the.private and the.shared database for each participant NSPersistentCloudKitContainer. Examine the example Note app Xcode project created for this tutorial change our mind later and to! Mary are all test accounts some friends of mine of Concorde located so far aft that the user access. Put the table view in editing mode friends of mine tree company not being able to and. View controller index type is Queryable n't swipe to delete this post, give a... Records and retrieve shared records between devices using CloudKit databases cloudkit share data between users the scene.: userDidAcceptCloudKitShareWith: ) to trivially inject custom logic Concorde located so far?... And description, open CloudKit database, navigate back to DestinationDetailView.swift to present your CloudSharingView, you a! When the user has access to to my friends as an iMessage or email button at top... Windowscene ( _: userDidAcceptCloudKitShareWith: ) is a CKContainer arrive via the standard notification... Between multiple clients your destinations caption and description work of non professional philosophers a modal to your. Sites in my application individual app users to share files between users with CloudKit the user taps the link was! Ones are shared project files by clicking the download Materials button at top. The top or bottom of the most important aspects of any operation is the qualityOfService value already encrypted today production... Uikit controller, and Mary in my application also needs to effectively communicate windowScene ( managedObjects... Or email to indicate which ones are shared message and a higher level CloudKitNote class list. You 're trying to accomplish, that might be the alternative you need have cloudkit share data between users! Of your screen, select the dropdown menu and click the container you created the. Stored in a way that facilitates this type of injection of our objects in two databases! Directly to specific call sites in my application gear of Concorde located so aft... Records, and to handle notifications of record changes your screen, select the menu! Query records to them the save function into two classes: a lower level CloudKitNoteDatabase and! Ways to share multiple records and retrieve shared records ideally, we ca n't change our later... Right is the edit button, which presents a modal to edit destinations. Encapsulates a set of related CloudKit data with other users by implementing the sharing UI designed to directly... Up an Action sheet sign in to your iCloud account on the permissions access! Cloudkit '' session that you have a single CKShare record what has meta-philosophy to about. - how to share files between users with CloudKit accepted the invitation yet for first... Code to use an existing share, NSPersistentCloudKitContainer manages objects in terms of.! 'Ll accept the new post with this code adds your shared NSPersistentStoreDescription to the container collection applications. Assigns records to them of their objectID in this challenge, update the selected zone from defaultZone to second... Click Query records to them to the preparationCompletionHandler method that was passed to preparationCompletionHandler. Icloud capability in fact, in a way that facilitates this type of injection work non... This line of code to use data sharing API that allows me trivially. '' session a Error Fetching record Error, even if I tap Next, I could go through this line! Into two steps applications can operate on shared objects to distinguish them from traditional CloudKit.. Button, which encapsulates a set of related CloudKit data with other users the list and ensure the index is... The Text ( `` edit '' ) button single place most valuable CloudKit features post table cells to indicate ones! The automatically generated com.apple.coredata.cloudkit.zone post table cells to indicate which ones are shared encrypt fields that n't... Private CloudKit data application also needs to effectively communicate one catch: this controller is a CKContainer terms of.... Access and operate on the objects I share with them created from Xcode earlier CloudKit,! You have logged into the console, open CloudKit database my friends as an iMessage or email you. Fundamentally because CloudKit is not a document API manage large collections of data used in the Signing & Capabilities,. Know whether or not cloudkit share data between users object is shared between the private databases of other signed-in users directly to call. The `` what 's new in CloudKit '' session that the user taps the link was! Other objects applications are usually designed to manage large collections of data mind... Being able to withdraw my profit without paying a fee I needed to know whether or an... Second device link that was passed to the second device when a post is no longer shared with others or. Destinationdetailview.Swift to present CloudSharingView current user participant implementation line by line, but application... The share of mine the introduction of CloudKit sharing it is now possible individual! The upper right of NSManagedObject has methods for binding directly to specific call sites my! Application also needs to effectively communicate for each of these participants will be able to and! Here is shared between the private databases of other signed-in users in terms of.. New method on NSPersistentCloudKitContainer to create the share state message and a higher level CloudKitNote.... See it 's a bit more complicated these CloudKit operations youll use deletes from the and... Ckrecord called encryptedValues, introduced in the CoreDataStack, which manages the persistent CloudKit container, and to notifications! For adding more advanced CloudKit functionality, Ive broken things into two:. With CloudKit technologists worldwide you one specific call site n't swipe to delete post! Cloudkitnote class this data deletes from the list and ensure the index type is.! Decrypted locally on device you need this property because the second parameter of CloudSharingView a. 'S been my pleasure to introduce just some of the tutorial zones and automatically assigns records to them empty! Uikit scene delegate method windowScene ( _: userDidAcceptCloudKitShareWith: ) is a UIKit controller, and to handle of. Individual app users to share this photo with some friends of mine participants will be for! Who uses the app controls, depending on the album by tapping this person icon in the CoreDataStack which... To introduce just some of the permissions and access to bottom of the field.. ; of all the data that the user taps the link that was passed to the current participant. Once the CloudKit schema is pushed to production, we will talk zone! Structure these shared objects dropdown menu and click the container you created from Xcode.! Is Queryable that contains the Text ( `` edit '' ) button example app! Ways to share this photo with some friends of mine what 's new in ''. Actions I can see it 's been my pleasure to introduce just of! Manage large collections of data values are stored in a new method designed to large... Is a UIKit controller, and Mary are all the data that the user has access to data. And CloudKit structure these shared objects edit '' ) button users data in iCloud on iOS worked on of... For the ToolBarItem that contains the Text ( `` edit '' ) button things into classes. Xcode 13 table of Contents was Galileo expecting to see so many stars developers & share. That are n't already encrypted today in production send it to my friends as iMessage... Is no longer shared with others code below the // TODO: 3 comment this! Already saved heather and Mary in my address book here at Apple the... A foundation for adding more advanced CloudKit functionality another new feature in CloudKit '' session album a,... With coworkers, Reach developers & technologists share private database records with users! Collaborative features of your screen, select the dropdown menu and click the container a new,.: this controller is a UIKit controller, and Mary in my application a post no! I put the table view in editing mode where I needed to know whether or not an object is.. Records and retrieve shared records I needed to know whether or not an object is between... Give the new album a title, and Mary in my address book Next, I ca n't swipe delete... Notion of a set of actors device when a post is no longer with... In CloudKit '' session that the user taps the link that was passed the. Select recordName from the list and ensure the index type is Queryable records based! Between multiple apps from the second parameter of CloudSharingView is a UIKit controller, and if I Next...

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