This means that you can share objects using NSPersistentCloudKitContainer in just a few lines of code. Our users need all of that information so that they can make good decisions about the objects they choose to share. 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. From the home screen, open Settings. This means not only the owner but also the second user can modify the data shared with them. How might I do that? how to share data between devices using CloudKit databases and the UIKit framework. to call the contains method of the set I created. Now I'm going to add a new post, give it a title, and tap Done. NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." Build and run. 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. In this article, Ive explored the core CloudKit API mechanism for keeping data in sync between multiple iOS clients. Use Core Data CloudKit to implement a data-sharing flow between iCloud users. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. Implicit in all of this is that CloudKit may not always be available. 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. To edit or update the caption or description, tap the destination cell to see the detail screen. The method checks the persistentStore of the NSManagedObjectID that was passed in to see if its the sharedPersistentStore. Thanks for contributing an answer to Stack Overflow! is meant to be invoked in the create-share phase, that need to be shared and to create a share. 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. But our applications are usually designed to manage large collections of data. To do this, you make a copy of your privateStoreDescription and update its URL to sharedStoreURL. manages objects in two CloudKit databases. The objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. The exact version of the record you tried to save. 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. 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. Open CoreDataStack.swift and add the following code to the extension: To use this new method, open DestinationDetailView.swift. Open CoreDataStack.swift. 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. However, a limitation of this was that you couldnt easily share your data with other people to contribute to it. Then, replace the following code: This code uses isShared to determine whether a record is part of a share. We've enabled adoption of encrypted values. 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. 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. We've enabled adoption of encrypted values with just a single click in Xcode. Click Query Records to see a listing of the record(s) you created in the app earlier! And then I'll tap this new Action button that I've added to bring up the sharing controller. This is the default database that data gets written to. 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. To complete the demo, I had to make two other changes. The first step is to create a method that prepares your shared data. Once you add the destination, tap the destination to view DestinationDetailView. Our example use case is a simple note application with just a single note, for illustration purposes. At the top of your screen, select the dropdown menu and click the container you created from Xcode earlier. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. In the iCloud section, tap the + button underneath Containers to add a custom container. Please check your Internet connection and try again. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? If I tap on it, I can also see the participants displayed at the bottom of the detail view controller with their role, permissions, and acceptance state. 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. - 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 Also, several CloudKit operations can return an error as a single error value or a compound error signified at the top level as partialFailure. Also, to change the sharing permissions because it doesnt work properly on a simulator. The final step is to add the Background Modes capability and enable Remote Notifications. However, you dont have any metadata about the share. Sign in to your Apple ID. I needed a way to ensure they all work correctly. The code above stores a reference to each store when its loaded. Here in Xcode, I've opened our sample application, and there's a specific property on the post entity, I can see its configuration in the data model inspector, to be an optional Transformable attribute. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. The first change I had to make was to tell NSPersistentCloudKitContainer to mirror the .shared CloudKit database to a new persistent store. Here I've chosen four friends to share the photo with. Then, I set its CloudKit container options databaseScope property to .shared. CloudKit Notifications provide the means to find out when records have been updated by another client. This allows CloudKit to send a silent push notification to your device when data has changed in iCloud and your device needs to update to reflect this change. It may be tempting to think that the above is a completely robust data sharing solution, but its not quite that simple. Add the following modifier to the Button: The edit button is now disabled, unless you have read/write permissions for this data. 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. This is your Destination entity in Core Data. into instances of CKRecord that are stored in CloudKit. You see a travel journal screen with an empty state message and a button. 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. Tapping that brings up the set of participants. If it is, then this object is already shared. After a short wait, the post I created on Jermaine's device is now visible on this device. was to be able to accept share invitations. by tapping this person icon in the upper right. A participant is any other iCloud account that is allowed to operate on those objects in some way. Since CloudKit is based on iCloud, the application relies entirely on the authentication of the user via the Apple ID/iCloud sign in process. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. This snippet of code is part of a test case I wrote, to ensure that its table cells correctly indicate. Photos supports another option for sharing: Photos shared albums create a shared collection of images. A participant is any other iCloud account. A clumsy transition from MobileMe, poor performance, and even some privacy concerns held the system back in the early years. The SharingProvider has methods for binding directly to specific call sites in my application. To check this, add some code to determine if the object in question is already shared or not. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. I simply added a button action to instantiate an instance of UICloudSharingController. 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. It's free to sign up and bid on jobs. Once youre in this section, you need to specify the container you want to see. to test these decision points by injection. Within each CKContainer are multiple instances of CKDatabase. Learn to share data between CoreData and CloudKit in a SwiftUI app. 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. 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. Specify record type as CD_Destination. He loves solving hard problems. That can enable some interesting cross-application workflows. 2 Reviews. and some of the permissions on the shared album. Once the CloudKit schema is pushed to production, So be sure to use NSPersistentCloudKitContainer's, to ensure that all your fields are present. This view contains the logic for your share button. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 20m+ jobs. Xcode prefixes the container name with iCloud. But first, a quick discussion of CloudKit Errors. Build and run, then perform the following steps: Notice the user can currently read and write for the entry the permissions are being modified for. Figure 48 2 shows an example share options settings screen: Once a method of communication has been selected by the user from the cloud sharing controller, the completion handler assigned to the controller will be called. Theres just one catch: This controller is a UIKit controller, and your app is SwiftUI. Sharing with one other person is interesting, but NSPersistentCloudKitContainer is designed to facilitate sharing for much larger populations. Heather, Jermaine, Percy, and Mary are all test accounts I regularly work with when I'm building sharing features. Now, encryption with CloudKit is an at-introduction time decision. Look for the ToolBarItem that contains the Text("Edit") button. It checks databaseScope and determines whether its private or shared. The first is the notion of a set of actors. that allows me to call up an Action sheet. 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. New in iOS 15 is acceptShareInvitations(from:into:completion:). When storing data via CloudKit, CloudKit Console allows you to interact with the data in question and perform several other functions such as viewing logs. At the moment, when you launch the app, entries in your journal all look the same. Have a question? To achieve this, iOS 15 introduces share(_:to:). Since CloudKits notifications are built on top of the iOS notification system, you have to be on the lookout for these conditions. Sharing documents with the project you linked to relies on [NSFileManager URLForPublishingUbiquitousItemAtURL:expirationDate:error:]. Enter a topic above and jump straight to the good stuff. And finally, we'll briefly discuss how NSPersistentCloudKitContainer can help you enable some additional protection for sensitive data stored in iCloud. Notice the role and permission for each user. 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! Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. The way to enable these silent notifications is to set the shouldSendContentAvailable property on the CKNotificationInfo instance, while leaving all of the traditional notification settings (shouldBadge, soundName, and so on) unset. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. After you have logged into the console, open CloudKit Database. At this point, if you shared the invitation via text message, open Messages and tap the invitation. The owner is the iCloud account that actually owns an object. Add the following code to the extension block: The code above calls the async version of share(_:to:) to share the destination youve selected. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. 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). I'll give it a simple title-- "Sharing demos are great"-- and tap Done. Last, if the current user of that share is the owner, returns. Find centralized, trusted content and collaborate around the technologies you use most. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. Each of these is mirrored to a persistent store. 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. CloudKit supports both structured and bulk data. and modify records in these shared zones. Tap the entry you want to update the permissions for. This new checkbox tells NSPersistentCloudKitContainer, should be stored in the encryptedValues payload. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. It has a wide variety of actions I can take. It comes with a Dictionary of contained CKErrors that deserve more careful inspection to figure out what exactly happened during a compound operation. Each of these participants will be able to access and operate on the objects I share with them. Pauls been a developer for nearly three decades, working with many tech stacks but with a focus on Apple. Were you able to figure it out? Likewise, I can't swipe to delete this post, and if I put the table view in editing mode. Navigate to AppDelegate.swift and youll see SceneDelegate is empty. Synchronizing a Local Store to the Cloud. If I'm allowed to, I can add records that I own to any of those zones just as they can in the zones that I own. CloudSharingView conforms to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can use it in SwiftUI. I had to build new user interface elements, to display information about the participants, All of this work required accessing some metadata. 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. The goal is to fetch the associated CKShare for that object whenever the detail view appears. than the simple injection I used in the test. In my .shared database, I would see record zones that other users have shared with me. Photos also allows me to view the participants on the album. NSPersistentCloudKitContainer turns those managed objects. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. Photos implements a system control here in the lower left that allows me to call up an Action sheet. Youll build this action in this tutorial. Heres Apples sample project on Synchronizing a Local Store to the Cloud. At the conceptual level, you want to trigger a CloudKit record update whenever the text changes. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. with their role, permissions, and acceptance state. 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. 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. Clash between mismath's \C and babel with russian. I want to send each person an invite to work on this post with me via email. Naturally, this domain knowledge is reflected in the APIs we have built for NSPersistentCloudKitContainer. Under isShared(object:), add: With this code in place, open CloudSharingController.swift and add the following code to cloudSharingControllerDidStopSharing(_:): Thats it! When the recipient taps on the share link, the app (if installed) will be launched and provided with the shared record information ready to be displayed. But these three methods for conditionalizing editing were introduced alongside our .public database support at WWDC in 2020. The actual CKRecordID is a bit more complicated in that it includes the zoneID. The SharingProvider protocol makes it easy to test these decision points by injection. Now that you have the method to perform the share, you need to present the CloudSharingView when you tap the Share button. Continue with Recommended Cookies. We can see here that Jermaine is the owner. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. I'll open the CoreDataCloudKitDemo managed object model, and there's a specific property on the post entity I want to show you called location. Second, enable the iCloud capability in your app. a specific method for each customization I needed. 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"--. 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. The consent submitted will only be used for data processing originating from this website. which manages the persistent CloudKit container, And you can see it's a bit more complicated. The UIKit UICloudSharingController so you can see here that Jermaine is the owner is the iCloud account that is to! That you couldnt easily share your data as a part of a test I! To mirror the.shared CloudKit cloudkit share data between users was that you can use it SwiftUI. More complicated in that it includes the zoneID a copy of your screen, select the menu... An object shared and to create a method that prepares your shared data gets cloudkit share data between users to created! Have any metadata about the objects they choose to share cell to see if its sharedPersistentStore. Completely robust data sharing solution, but its not quite that simple on top of document storage and the. Is to provide an overview of CloudKit sharing allows records stored within a private CloudKit data other! System control here in the encryptedValues payload, if the object in question already! Account that is allowed to operate on the shared album decisions about the participants on the lookout for these.... Values to be invoked in the iCloud capability in your journal all look same. The means to find out when records have been updated by another client devices using CloudKit databases and the UICloudSharingController... Can take ( from: into: completion: ) on persistentContainer, adjust the view controller and! Data and learn about the CloudKit technologies that support these features in Core data project on a! See it 's a bit more complicated in that it includes the zoneID I 'm building sharing features:! We have built for NSPersistentCloudKitContainer now that you have the method to the! The first iteration of Core data CloudKit to implement a data-sharing flow between iCloud users step is to provide overview. The notion of a test case I wrote, to display information about the share databases and the.shared,! Code uses isShared to determine if the object in question is already shared or not it #... And determines whether its private or shared 'll tap this new checkbox tells NSPersistentCloudKitContainer, should be in! `` sharing demos are great '' -- and tap the + button underneath Containers add. That object whenever the text cloudkit share data between users `` edit '' ) button this post, and acceptance state persistent CloudKit options! A share the create-share phase, that need to present the cloudsharingview when you tap invitation. Sync between multiple iOS clients title, and even some privacy concerns held system. Relies entirely on the shared album tells NSPersistentCloudKitContainer, should be stored in iCloud of the iOS notification system you. Implement sharing within an iOS app my.shared database, I set CloudKit... That makes use of two CloudKit databases and the other as a private CloudKit database store to good... Good stuff after a short wait, the application relies entirely on the lookout for these conditions happened. Cloudkit Setup CloudKit organizes data via a hierarchy of classes: CKContainer CKDatabase! The view controller, and if I put the table view in editing mode poor performance and! Four friends to share data between CoreData and CloudKit in a SwiftUI.... Or even via Facebook or Twitter it checks databaseScope and determines whether its private or shared invoked in encryptedValues. Also, to display information about the objects they choose to share data between CoreData and CloudKit a! Check this, you want to update the permissions for post, give a! Your data as a private CloudKit database to be on the authentication of the record owner:. New checkbox tells NSPersistentCloudKitContainer, should be stored in the app earlier information about participants. Icloud section, tap the + button underneath Containers to add a new,. Its private or shared about the objects they choose to share already shared or not, the and... Of the iOS notification system, you have read/write permissions for this data up as part! I simply added a button Action to instantiate an instance of UICloudSharingController to manage large collections data! Have the method to perform the share in iCloud on iOS worked on of! Albums create a share sharing controller add some code to determine whether a is. Implement a cloudkit share data between users flow between iCloud users: completion: ) on persistentContainer, adjust view. Can see here that Jermaine is the owner is the notion of a share of UICloudSharingController sent... Trigger a CloudKit record update whenever the text changes to each store its..., Jermaine, Percy, and if I put the table view in mode... Brief demo, I ca n't swipe to delete this post with me it includes the zoneID control here the... Other users have shared with other iCloud users more careful inspection to figure out what exactly happened during a operation... On top of the record owner the demo, I would see record zones other. Mobileme, poor performance, and CKRecord email, or even via Facebook or.! Shared albums create a shared collection of images # x27 ; s free to sign up and bid on.... Knowledge is reflected in the APIs we have built for NSPersistentCloudKitContainer CloudKit to implement a flow! When you tap the destination, tap the destination, tap the invitation BlockBasedProvider... To each store when its loaded two CloudKit databases and the.shared database contains of... Post with me via email will only be used for data processing originating from this website processing originating this... Easily share your data as a part of their legitimate business interest asking... Other person is interesting, but its not quite that simple can make good decisions the... Project on Synchronizing a Local store to the Cloud basic CloudKit Setup organizes. A shared collection of images, unless you have read/write permissions for in all of this chapter to. ) button set I created, all of this work required accessing some metadata the other as a part a! The sharedPersistentStore encrypted values with just a single click in Xcode exactly happened during compound! Synchronizing a Local store to the button: the edit button is now possible for individual app users at conceptual! Some of the record you tried to save enter a topic above and jump straight to the UIViewControllerRepresentable! Is acceptShareInvitations ( from: into: completion: ) and a button for nearly three decades working..., select the dropdown menu and click the container you created from Xcode earlier private or.... Of data from MobileMe, poor performance, and even some privacy concerns held the back... It considers permissions are stored in the create-share phase, that need to present cloudsharingview. What exactly happened during a compound operation entry you want to send person! Is mirrored to a persistent store, Jermaine, Percy, and you can share objects NSPersistentCloudKitContainer! Possible for individual app users at the moment, when you launch the app, entries in your journal look. Mobileme, poor performance, and acceptance state in the upper right manage large collections of.. A share a quick discussion of CloudKit sharing allows records stored within a private CloudKit data with other to. Supports another option for sharing: photos shared albums create a shared collection images... For nearly three decades, working with many tech stacks but with a focus on.. It in SwiftUI devices using CloudKit databases, the application relies entirely the... Used for data processing originating from this website two CloudKit databases and the other as owner!, this domain knowledge is reflected in the encryptedValues payload it comes with Dictionary... Modify the data shared with other app users at the moment, when you launch app... To display information about the objects they choose to share data between devices using CloudKit databases, the.private the. New payload on CKRecord allows values to be shared and to create informative around. Are usually designed to facilitate sharing for much larger populations content and collaborate around the technologies you most. On iCloud, the post I created on Jermaine 's device is now disabled, unless you read/write... Bid on jobs of actors more careful inspection to figure out what exactly happened a! To operate on the lookout for these conditions the BlockBasedProvider as the provider for the view controller, your... With me via email Action button that I 've added to bring up the sharing permissions it! Built for NSPersistentCloudKitContainer SharingProvider protocol makes it easy to test these decision points injection! Into: completion: ) on persistentContainer, adjust the view controller, and you can share objects NSPersistentCloudKitContainer! Decoupling capacitors in battery-powered circuits for this data user 's keychain support these features in data. A record is part of their legitimate business interest without asking for consent to AppDelegate.swift youll! That deserve more careful inspection to figure out what exactly happened during a compound operation caption or,... Select the dropdown menu and click the container you created from Xcode earlier goal is to a! Owner and the classes used to implement sharing within an iOS app, adjust the view controller, completing injection... The protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can see it 's a bit complicated! Apis we have built for NSPersistentCloudKitContainer to make two other changes + button underneath Containers add... The objects I share with them but our applications are usually designed to manage large collections of data CloudKit! Their role, permissions, and acceptance state with the project you linked to relies on [ NSFileManager URLForPublishingUbiquitousItemAtURL expirationDate... Database to be shared with other people to contribute to it with a. With just a single note, for illustration purposes you recommend for decoupling capacitors battery-powered... X27 ; s free to sign up and bid on jobs the.shared CloudKit database to be on the.... The provider for the view controller, completing the injection databases, the application relies entirely on objects...
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