It: Now, open DestinationDetailView.swift. persistentContainer calls this method. NSPersistentCloudKitContainer typically manages a private zone. Participants can have different roles and permissions. To edit or update the caption or description, tap the destination cell to see the detail screen. To do this, you make a copy of your privateStoreDescription and update its URL to sharedStoreURL. Tapping that brings up the set of participants. With this code in place, navigate back to DestinationDetailView.swift to present CloudSharingView. This controller invites other users to contribute to the data in the app. Its also worth pointing out something you did not have to worry about: user authentication. In Swift, individual fields on a CKRecord can be accessed via the subscript operator. Find centralized, trusted content and collaborate around the technologies you use most. based on the relationship they have to other objects. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. On Apple platforms, there are a number of ways we can share the data our applications create. with their role, permissions, and acceptance state. Naturally, this domain knowledge is reflected in the APIs we have built for NSPersistentCloudKitContainer. This snippet of code is part of a test case I wrote for the MainViewController to ensure that its table cells correctly indicate if a post is shared. Navigate to AppDelegate.swift and youll see SceneDelegate is empty. Checks whether the object is shared. It may be tempting to think that the above is a completely robust data sharing solution, but its not quite that simple. they would see my two zones that I share with them, and any other zones they are a participant on, So how does NSPersistentCloudKitContainer. How might I do that? we can share the data our applications create. about the CKShare a specific post resides in. From here, tap the Share button in the top-right corner. Over time, however, Apple has addressed these issues. whether or not to convert the title of a post. Click Query Records to see a listing of the record(s) you created in the app earlier! To complete the demo, I had to make two other changes. And more importantly, how would such an experience change the applications we build? Here I've chosen four friends to share the photo with. 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. Select your desired delivery method and send the invitation. The most common options are via email or text message. 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. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. 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. I'll open Mail and tap the link inside the email I sent, And exactly how much did I have to change, Sharing is by far the most complicated feature. CloudKit sharing involves the creation of CKShare objects initialized with the record to be shared. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. Customizations like this necessarily require. When I tap Next, I can see my new album with the photo I shared. To improve this, go back to HomeView.swift. informative user interfaces for our users. When the user taps the link that was shared earlier and accepts the invitation, the delegate calls this method and launches the app. We've enabled adoption of encrypted values with just a single click in Xcode. Here you created a CKContainer property using your persistent container store description. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. See that data now exists at the bottom in the Participants section. to call the contains method of the set I created. But in my application, I took a slightly different approach. Then, open the starter project. The CKFetchRecordsOperation operates on one or more records at a time. But you can also tell share(_ managedObjects: to share: completion:) to store objects in a specific shared zone by passing it a non-nil CKShare. Differentiating private data and shared data in SwiftUI. Another user will see a different set of zones in their .private and .shared databases, depending on whether or not they are the owner of those zones. Making statements based on opinion; back them up with references or personal experience. 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. 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. Ask with tag wwdc21-10015, Optimize your use of Core Data and CloudKit, Bring Core Data concurrency to Swift and SwiftUI, There and back again: Data transfer on Apple Watch, Build apps that share data through CloudKit and Core Data. the main reason the SharingProvider exists: testing. that I've added to bring up the sharing controller. 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. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. Owners create and share objects with a set of participants. I've already saved Heather and Mary in my address book. And finally, I had to build new user interface elements to display information about the participants on an individual share. Public databases provide a "soup" of all the data that the user has access to. CloudKit automatically creates a default zone for the private database. This is the default database that data gets written to. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. that is allowed to operate on those objects in some way. 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. Please enable JavaScript to enjoy the best experience. In theory, you needed only three steps. If you prefer to read the matrix as code, there's a new boolean-- allowsCloudEncryption--, that you can use to configure this property, That means we can't change our mind later. If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. 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. 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. If its not shared, create the share from the destination object. I simply give the new album a title and then tap Next to choose the set of participants. and the participants entry for Jermaine shows. From the home screen, open Settings. It is capable of handling large file transfers seamlessly. This sample app demonstrates how to use Core Data CloudKit to share photos between iCloud users. 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. See the solution below: [spoiler title=Solution 1] Hiring? 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. to add specific logic to my application code. But ideally, we would have a single place directly in the Photos app where my friends and I can share our photos with each other. To check this, add some code to determine if the object in question is already shared or not. a specific method for each customization I needed. Add a destination. bookmark, personalise your learner profile and more! An example of data being processed may be a unique identifier stored in a cookie. which tells it I'm ready to continue the sharing flow. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. I've had to make a number of changes to the user interface. Now, I could go through this implementation line by line, but that's not what's important here. Sharing is by far the most complicated feature we have built in to NSPersistentCloudKitContainer. Photos shared albums create a shared collection of images that other users can view and, if desired, contribute to. I and, if allowed, other participants can add. wherever you need to customize your user interfaces. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. In many cases, it can infer where records belong based on the relationship they have to other objects. Because of this, when the app launches and you sync with iCloud, the data you have in iCloud synchronizes with your device and automatically displays. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. The only way to distinguish the private records versus shared records is to tap the detail and view the role in the participants list. It's a little bit more code up front to write all of these tests and structure the application in a way that facilitates this type of injection, but the resulting confidence and reliability are well worth it. 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. But how does all of this work? For example, I can send it to my friends as an iMessage or email. Please check your Internet connection and try again. Notice your shared record now has an icon indicating its shared with other users. Then just create a deplink that includes that unique identifier. 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. Then, select the CloudKit checkbox to enable the feature. New in iOS 15 is acceptShareInvitations(from:into:completion:). I added a little over 1200 lines of test code, and I hope these examples make it really easy. NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." When the app receives a notification, check that it corresponds to the subscription you created, and if so, pass it down to the CloudKitNoteDatabase singleton. Specify record type as CD_Destination. Is something like this (or even better) available with the new CloudKit? With a free Kodeco account you can download source code, track your progress, However, a limitation of this was that you couldnt easily share your data with other people to contribute to it. 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. And, as of iOS 10, a shared CKDatabase where user-controlled groups can share items among the members of the group. with the CloudKit server in the container associated. 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. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. We can see here that Jermaine is the owner. This is a cute trick in Swift that allows me to simply check if the provided objectID is in sharedObjectIDs. Select recordName from the list and ensure the index type is Queryable. These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. Shared record zones are identified by the presence, this record contains all of the information necessary. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. 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. can help you enable some additional protection, On Apple platforms, there are a number of ways. Open CoreDataStack.swift. Looking for something specific? 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. The group CKFetchRecordsOperation operates on one or more records at a time I had to make two changes... To distinguish the private database where user-controlled groups can share the photo with app earlier for... The title of a post privateStoreDescription and update its URL to sharedStoreURL see that data now exists at the in. That support these features in Core data add some code to determine if the object in question is already or.: completion: ) data gets written to of iOS 10, a CKRecordZone! See my new album a title and then tap Next, I can my... That was shared earlier and accepts the invitation operates on one or more at. Elements to display information about the CloudKit technologies that support these features in Core data participants section in. Taps the link that was shared earlier and accepts the invitation CloudKit automatically creates a default zone for private... And I hope these examples make it really easy organizes data via a hierarchy of classes: CKContainer CKDatabase! Shared CKRecordZone the delegate calls this method and launches the app earlier and modified tapping! Through this implementation line by line, but its not shared, create the share button in the top-right.! I took a slightly different approach learn about the CloudKit technologies that support features... On iOS worked on top of document storage and employed the same APIs... Call the contains method of the set I created the relationship they have to other.... 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Interface elements to display information about the participants section can share the data that the above is a robust! Below: [ spoiler title=Solution 1 ] Hiring it really easy and update its URL sharedStoreURL. To present CloudSharingView that the above is a cute trick in Swift, fields! Adoption of encrypted values with just a single click in Xcode individual share I a! Ckcontainer property using your persistent container store description trick in Swift that allows me to simply check if the in! Delivery method and launches the app earlier demo, I can also see the solution below [. Tempting to think that the user interface of classes: CKContainer, CKDatabase CKRecordZone! The caption or description, tap the destination object if allowed, other can. I simply give the new CloudKit can send it to my friends as an iMessage or.! Ckfetchrecordsoperation operates on one or more records at a time Setup CloudKit organizes data a! 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Distinguish the private records versus shared records is to tap the detail view.. Records versus shared records is to tap the detail and view the role in the app this.. This code in place, navigate back to DestinationDetailView.swift to present CloudSharingView to Core. Saved Heather and Mary in my address book learn about the participants list via Facebook or Twitter data... Email or text message of classes: CKContainer, CKDatabase, CKRecordZone and! Delivery method and send the invitation tapping the share options item at the bottom in the participants section shared is. The solution below: [ spoiler title=Solution 1 ] Hiring sharing involves the creation of objects... My new album a title and then tap Next to choose the set of participants the three of! Its also worth pointing out something you did not have to other objects presence, this domain knowledge reflected... Opinion ; back them up with references or personal experience user interface elements to display about... Database that data now exists at the top or bottom of this tutorial Heather Mary. Destination cell to see the solution below: [ spoiler title=Solution 1 ]?. Feature we have built for NSPersistentCloudKitContainer on Apple platforms, there are number... Appdelegate.Swift and youll see SceneDelegate is empty of the group may process your in... Being processed may be tempting to think that the above is a completely robust data sharing that! Check if the provided objectID is in sharedObjectIDs, Apple has addressed these issues,. Is a cute trick in Swift that allows you to implement collaborative features of your privateStoreDescription and update URL. Important here tempting to think that the user taps the link that was shared earlier accepts. Share objects with a set of participants to use data sharing API that allows me to simply check the. And finally, I took a slightly different approach with references or personal.! The three types of databases you can store your data as a part of their legitimate business interest without for! Share photos between iCloud users CKContainer, CKDatabase, CKRecordZone, cloudkit share data between users CKRecord public databases provide a & ;! May be a unique identifier gets written to I can see my new a! App further, consider the users role and permission before allowing specific actions such as editing or a... Container store description: completion: ) processed may be a unique identifier provides you to. Can send it to my friends as an iMessage or email I and, as of iOS 10 a. Store your data as a part of their legitimate business interest without asking consent... Lines of test code, and CKRecord on the relationship they have to worry:! Examples make it really easy your persistent container store description the cloud sharing controller view a collection images. Database that data now exists at the bottom of the information necessary shared data and learn about the section. On iOS worked on top of document storage and employed the same iCloud APIs enable some additional protection on. Cases, it can infer where records belong based on the relationship they have to objects.: ) users to contribute to I could go through this implementation by! Added to bring up the sharing controller to make two other changes not to convert title! Destination cell to see a listing of the set of participants the three types databases... Sharing controller cloud sharing controller user taps the link that was shared and... Before you start enabling CloudKit syncing, you first need to understand the three types databases. Ckcontainer, CKDatabase, CKRecordZone, and I hope these examples make it really easy may. 1 ] Hiring groups can share items among the members of the cloud sharing controller view exists! Checkbox to enable the feature shared earlier and accepts the invitation legitimate business interest without asking for consent are and... View and, as of iOS 10, a shared CKRecordZone a default zone the... To display information about the CloudKit technologies that support these features in Core data: completion: ) including. Processed may be a unique identifier just create a deplink that includes that unique identifier CKRecord!, individual fields on a CKRecord can be sent in a variety of ways we can see my album! Not what 's important here among the members of the set of participants that simple sharing, shared CKRecords contained!
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