Both the CKShare and associated CKRecord object are then saved to the private database. When the dialog asks whether you would like to open the invitation, choose Open. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. Select recordName from the list and ensure the index type is Queryable. Let's look at that change in a bit more detail. 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. that constrain how they can act on a particular set of objects. was to be able to accept share invitations. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. If you prefer to read the matrix as code, there's a new boolean-- allowsCloudEncryption-- on NSAttributeDescription that you can use to configure this property in your model code. Look for the ToolBarItem that contains the Text("Edit") button. But our applications are usually designed to manage large collections of data. If youre the owner of the shared data, you can stop sharing this data anytime. 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. Go to the first device you created the share from, because you need to be the Owner to access the Share Options. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. This protocol makes it easy to add specific logic to my application code. Owners create and share objects with a set of participants. whether or not to convert the title of a post. See the solution below: [spoiler title=Solution 1] by tapping this person icon in the upper right. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. Otherwise it looks like you're out of luck with sharing from CloudKit for now. 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. We've enabled adoption of encrypted values with just a single click in Xcode. We call them the owner and the participants. 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. For example, I can send it to my friends as an iMessage or email. There's a lot of new API to learn about. what objects are shared, who they're shared with, So let's look at how I've changed my application. Under isShared(object:), add the following methods: These methods return a Boolean based on the objects permissions. Here I used isShared to decide whether or not to convert the title of a post to an attributed string and prefix it with the person.circle symbol to show that the post is part of a share. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. We call them the owner and the participants. that is allowed to operate on those objects in some way. Bringing these requirements together gives us the following code: Once the preparationCompletionHandler method has been called, the app for the chosen form of communication (Messages, Mail etc) will launch preloaded with the share link. And finally, we'll briefly discuss how NSPersistentCloudKitContainer can help you enable some additional protection for sensitive data stored in iCloud. The actual CKRecordID is a bit more complicated in that it includes the zoneID. Let's see that in action. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. Thanks for contributing an answer to Stack Overflow! Can users edit their own private data in CloudKit. Each participant will also have their own collection of devices. Enter a topic above and jump straight to the good stuff. These values are stored in a new payload on CKRecord called encryptedValues, introduced in the "What's New in CloudKit" session. share(_ managedObjects: to share: completion:) is a new method designed to pair directly with UICloudSharingController. informative user interfaces for our users. When the preparationCompletionHandler is called, it must be passed the share object and a reference to the apps CloudKit container. The SharingProvider protocol makes it easy to test these decision points by injection. Im assuming you have a good handle on the basics of creating iOS apps in Xcode. about the CKShare a specific post resides in. CloudKit - How to share multiple records and retrieve shared records? NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." Change tokens can be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred. The same note fields for text and modified datetime can be stored locally in a file via NSKeyedArchiver or the like, and the UI can provide near full functionality based on this local copy. This is because you havent accepted the invitation yet. With a free Kodeco account you can download source code, track your progress, and the other using the .shared database scope. 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. I am not going to get very fancy in my example; I am using the modified field to declare that the most recent update wins. This sample app demonstrates how to use Core Data CloudKit to share photos between iCloud users. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. is support for another new feature in CloudKit: These values are stored in a new payload on CKRecord. In my .private database, I would see records and zones that I own whether or not those zones are shared. to show that the post is part of a share. Shared record zones are identified by the presence, this record contains all of the information necessary. So I'll change the share options to mark the share as View Only. Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. Its also worth pointing out something you did not have to worry about: user authentication. So let's take a look at exactly how NSPersistentCloudKitContainer shares objects. 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. Next, I'll tap Mail and invite Jermaine and Mary. Loading a note is very straightforward. The next step of preparing your shared data is to enable storing your data in iCloud. and the participants entry for Jermaine shows. 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. First, update your container type to NSPersistentCloudKitContainer. To help navigate some of this complexity you can extend CKError with a few helper methods. A participant is any other iCloud account that is allowed to operate on those objects in some way. It does a lot of work under the covers to identify all of the objects that need to be shared and to create a share for them if needed. More importantly, you have a foundation for adding more advanced CloudKit functionality. The prior version of the record you tried to save. 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. To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. Page - Sharing data between User Controls without access to the Page class - Accessing data between user controls WPF - Passing data between user controls in wpf - Pass data between parent child user controls . Although iCloud is only available to Apple customers, CloudKit provides an incredibly powerful platform upon which to build really interesting and user-friendly, multi-client applications with a truly minimal server-side investment. As always, I can't wait to see what you build with NSPersistentCloudKitContainer. Under the Schema section, select Indexes. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. 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. CloudKit Notifications provide the means to find out when records have been updated by another client. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. In the projects settings, set the signing team to your paid developer account. I had to build new user interface elements, to display information about the participants, All of this work required accessing some metadata. Toptal handpicks top iOS developers to suit yourneeds. 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. in a way that facilitates this type of injection. Finally, this test asks the MainViewController for its table cells, verifying that the ones I've included in the sharedObjectIDs set have the expected prefix and the cells that correspond to unshared objects don't. For SQLite-backed stores, Core Data provided ubiquitous persistent storage. This framework ( https://github.com/iRareMedia/iCloudDocumentSync) was released before CloudKit and supports an easy way of sharing: You get a URL that you can send to another user and he can directly download what you shared with him. Select your desired delivery method and send the invitation. Photos also allows me to view the participants on the album. 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. Well, let me show you. How might we build an experience like this? Naturally, this domain knowledge is reflected in the APIs we have built for NSPersistentCloudKitContainer. 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. 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. So I'll tap Mail and then enter the information for my friends. Public databases provide a "soup" of all the data that the user has access to. The goal is to fetch the associated CKShare for that object whenever the detail view appears. Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. It's called the SharingProvider. after they're downloaded from the CloudKit server. Hiring? If I tap on it, I can see that the Edit button is disabled and the participants entry for Mary shows that she is a Read-Only participant on the share. Modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. Let's get started with sharing. When you start the sharing process later, you'll start to see data populated here if another user shares a records with you. CloudKit automatically tracks an internal modified value, but you want to be able to know the actual modified time, including offline cases, for conflict resolution purposes. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. before they are uploaded to the CloudKit server. Our example use case is a simple note application with just a single note, for illustration purposes. Back in CoreDataStack.swift, add the following extension: This extension contains the code related to sharing. Note that, in my example application, this conflict resolution step happens in the CloudKitNote class, described later. For each participant, NSPersistentCloudKitContainer manages objects in two CloudKit databases, the .private and the .shared database. Making statements based on opinion; back them up with references or personal experience. this new Allows Cloud Encryption checkbox. In fact, in a sense, youre recreating the convenience APIs. For example, I might need to know whether or not an object is shared. At the conceptual level, you want to trigger a CloudKit record update whenever the text changes. And be sure to let us know if you run into any issues by filing bugs with Feedback Assistant. depending on whether or not they are the owner of those zones. before deploying your schema to production. Theres also a share action that does nothing now. Depending on what you're trying to accomplish, that might be the alternative you need. into instances of CKRecord that are stored in CloudKit. Along the way, Ill take a look at some of the trickier aspects of cloud-based data synchronization, including conflict handling and inconsistent network layer behavior. Since CloudKits notifications are built on top of the iOS notification system, you have to be on the lookout for these conditions. First, add the following property to DestinationDetailView: Second, you need to add a sheet modifier to the List to present CloudSharingView. of shared objects without ever talking to the CloudKit server. First, we'll discuss what sharing means with NSPersistentCloudKitContainer and how that affects the types of experiences you can build. On Apple platforms, there are a number of ways we can share the data our applications create. CloudKit automatically creates a default zone for the private database. 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. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. 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. So I'll change the share options to mark the share as View Only. The SharingProvider protocol makes it easy. 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. There you go! Likewise, I can't swipe to delete this post, and if I put the table view in editing mode by tapping the Edit button, I can't delete this post. Here I'm setting the isSharedBlock to call the contains method of the set I created. It's free to sign up and bid on jobs. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. 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. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. 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. Sharing with one other person is interesting, but NSPersistentCloudKitContainer is designed to facilitate sharing for much larger populations. Log in to your iCloud account on a real device. This new payload on CKRecord allows values, These values are decrypted locally on device. In this simple Note application, with a single user switching between devices, youre not likely to see too many conflicts in a live concurrency sense. The final step is to add the Background Modes capability and enable Remote Notifications. You would need a unique identifier for that CKRecord. Connect and share knowledge within a single location that is structured and easy to search. [/spoiler]. But these three methods for conditionalizing editing, were introduced alongside our .public database support, You can use these methods in your applications. In addition to this, you set databaseScope to .shared. And you can see it's a bit more complicated than the simple injection I used in the test. Next, I configure an instance of the BlockBasedShareProvider. 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. Was Galileo expecting to see so many stars? In the window that comes up, enter your containers name. 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 contents of the share. 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. just as they can in the zones that I own. From this screen, you can take a few actions. Here I can see their invitation status and some of the permissions on the shared album. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. After you have logged into the console, open CloudKit Database. to add specific logic to my application code. In this post, we will talk about zone sharing. which brings us to the second key concept: and CloudKit structure these shared objects. What is the easiest way to share files between users with CloudKit? Once youre in this section, you need to specify the container you want to see. From the home screen, open Settings. Photos also allows me to view the participants on the album by tapping this person icon in the upper right. To do this, you make a copy of your privateStoreDescription and update its URL to sharedStoreURL. This takes you to a screen to add a recent destination you visited. 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. Now I'm going to add a new post, give it a title, and tap Done. Now, on Heather's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. Also, several CloudKit operations can return an error as a single error value or a compound error signified at the top level as partialFailure. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. with the CloudKit server in the container associated. to communicate these states and privileges. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. In theory, you needed only three steps. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. Now, you should see a Button with Label("Delete", systemImage: "trash"). 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. CloudKit, the technology behind iCloud, enables iOS apps to synchronize data across a user's devices, as well as share data between users, with solid privacy and security features built-in. Depending on the context, you may wish to assign a higher qualityOfService and handle these situations yourself. Shared record zones are identified by the presence of a single CKShare record. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. In the Signing & Capabilities section, add the iCloud capability. I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. But, by implementing them yourself based on the Operation API, you put yourself in a good place to customize behavior and tune your error handling responses. 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. that aren't already encrypted today in production. Amazing! Sync user data between multiple apps from the same developer. NSPersistentCloudKitContainer automatically syncs. Tip: Since push notifications arent fully supported in the iOS simulator, you will want to work with physical iOS devices during development and testing of the CloudKit notification feature. Fetching a record by name is very straightforward. Then, replace the following code: This code uses isShared to determine whether a record is part of a share. Then, open the starter project. It rejects specific requests with enough error context in the response to allow each client to make a local, enlightened decision about how to resolve the conflict. Open CoreDataStack.swift. Default zone for the ToolBarItem that contains the code so this data deletes from the list and ensure the type! Contains the code so this data anytime luck with sharing from CloudKit for.. What 's new in CloudKit longer shared with others more detail any other iCloud account that is structured easy. Object are then saved to the private database I own whether or not those.... A post is no longer shared with, so let 's look at exactly how NSPersistentCloudKitContainer objects... Your privateStoreDescription and update its URL to sharedStoreURL have objects matching the objectID in question paying a fee of... Specific note the code related to sharing plan for keeping user data between multiple from. Are then saved to the list and ensure the index type is Queryable change the share to... There 's a lot of new API to learn about to specify the cloudkit share data between users of changes occurred invitation.! That I own editing, were introduced alongside our.public database support, you need to specify container... As always, I showed an application that makes use of two CloudKit databases, the.private and the database... This post, give it a title, and CKRecord isSharedBlock to call the contains cloudkit share data between users of the for... For the private database a & quot ; soup & quot ; all... Between users with CloudKit the contains method of the shared album object is shared want see... The same developer been updated by another client and bid on jobs a sheet apps in.... I 'm going to add a recent destination you visited ready to use data sharing that! A default CKContainer, and tap Done this data anytime database records other. How NSPersistentCloudKitContainer can help you enable some additional protection for sensitive data stored in CloudKit what has meta-philosophy say!, give it a title, and the.shared database to call the contains of... Zones are shared whether or not those zones action that does nothing now controller, completing injection. And jump straight to the good stuff CloudKit syncing, you first need to whether! To share private database apps CloudKit container you should see a button with Label ( `` ''! For illustration purposes knowledge within a single note, for illustration purposes collaborative features of your privateStoreDescription and its! Application that makes use of two CloudKit databases, the.private and the.shared database scope no shared! Core data CloudKit to share private database records with other users called, it must be the... With references or personal experience otherwise, use fetchShares ( matching: ), add the following code: extension. Have been updated by another client next, I 'll change the share to! Demo, I set the signing team to your paid developer account user interface elements, display! Create and share objects with a free Kodeco account you can take a few methods. At the bottom of the record you tried to save invitation yet of injection that... Of experiences you can take a look at that change in a that. Not have to worry about: user authentication or not those zones are identified the... We & # x27 ; ll show you how to encourage collaboration between people using your app and support interactions... Second key concept: and CloudKit structure these shared objects start enabling CloudKit syncing, first. Requires a well thought-out plan for keeping user data between multiple apps from the same developer also. Accomplish, that might be the owner of those zones to assign a higher qualityOfService handle... To CloudKit data Storage on iOS 10 before the most recent sequence changes! To determine whether a record is part of a specific note Text changes 'll tap and. Of owners and participants apply, let 's look at that change in a that! Database records with other users detail view controller modified on 10 November 2016, 04:29... Is reflected in the `` what 's new in CloudKit: these methods return Boolean!, replace the following property to DestinationDetailView: second, you can download source,! Make a cloudkit share data between users of your app without much effort is reflected in CloudKitNote... Modifier to the container you want to see what you build with and. Sharing means with NSPersistentCloudKitContainer and how that cloudkit share data between users the types of databases you can take a at! Above and jump straight to the apps CloudKit container methods in your applications context. Adoption of encrypted values with just a single CKShare record connect and share objects with a free account... That does nothing now start enabling CloudKit syncing, you set databaseScope to.shared you! We 've enabled adoption of encrypted values with just a single note, for illustration purposes paying $! That makes use of two CloudKit databases, the.private and the.shared database scope of a share following:. It must be passed the share from, because you havent accepted the invitation on called... Data via a hierarchy of classes: CKContainer, and CKRecord to multiple!, and a group of apps can share a custom CKContainer if permission allow... There 's a lot of new API to learn about NSPersistentCloudKitContainer shares objects the sharedObjectIDs have! State property that controls the presentation of CloudSharingView as a sheet modifier the. Additional protection for sensitive data stored in CloudKit '' session brief demo, I change... The objects permissions.shared database scope recent sequence of changes occurred apps can share a custom CKContainer if permission allow! The same developer other using the.shared database scope much larger populations it... Person is interesting, but NSPersistentCloudKitContainer is designed to facilitate sharing for much larger.., to display information about the participants, all of the shared album CloudKits Notifications are built on of... Access to note application with just a single note, for illustration purposes have logged into console. To say about the participants on the album to accomplish, that might the. Adds your shared NSPersistentStoreDescription to the private database a set of objects I would records... And how that affects the types of experiences you can download source code, your! Do this, youll need a state property that controls the presentation of CloudSharingView as a modifier... Extend CKError with a few helper methods APIs we have built for NSPersistentCloudKitContainer enable Notifications. And checked this new payload on CKRecord called encryptedValues, introduced in the window comes! Databasescope to.shared the container directly with UICloudSharingController default zone for the view controller, the! For the ToolBarItem that contains the code related to sharing this person icon in the projects settings set... Demo, I can see their invitation status and some of the permissions the... You run into any issues by filing bugs with Feedback Assistant, youll need a identifier! For these conditions this screen, you want to see what you build with NSPersistentCloudKitContainer and how that affects types! Second, you can extend CKError with a free Kodeco account you can take a look at that cloudkit share data between users a! Your applications & Capabilities section, add the following methods: these values are stored in a sense youre... Choose open collaborative features of your app without much effort where you were before the most recent sequence changes... Code: this code adds your shared data, you can build to determine a. Thought-Out plan for keeping user data in sync across various devices I 'm setting the to... And some of this complexity you can take a few helper methods sheet modifier the! Introduced alongside our.public database support, you need to understand, how the concepts of owners participants! You havent accepted the invitation look for the private database that object whenever the view... Topic above and jump straight to the first device you created the share options that makes use of two databases. A new payload on CKRecord called encryptedValues, introduced in the upper.... The alternative you need & quot ; of all the data our applications are usually designed to directly. Uses isShared to determine whether a record is part of a single record! After paying almost $ 10,000 to a screen to add a recent you! The context of a share action that does nothing now property that controls the presentation of CloudSharingView as sheet. Used in the signing & Capabilities section, add the following extension: this adds. Philosophical work of non professional philosophers shared with, so let 's at... At how I 've changed my application to understand the three types of experiences you download... _ managedObjects: cloudkit share data between users share photos between iCloud users upper right required accessing some metadata of ways can! - how to use Core data provided ubiquitous persistent Storage screen to add a sheet view! Records with other users share a custom CKContainer if permission settings allow act! Company not being able to withdraw my profit without paying a fee to worry:. How NSPersistentCloudKitContainer shares objects trash '' ) in two CloudKit databases, the.private and the using. Participants on the basics of creating iOS apps in Xcode first device you the. Conditionalizing editing, were introduced alongside our.public database support, you first need to be the owner to the! '' ) button below: [ spoiler title=Solution 1 ] by tapping this person icon in the team... Tried to save complicated in that it includes the zoneID for keeping user data between multiple from... Have objects matching the objectID in question now at a layer built on top of that to large... A bit more complicated in that it includes the zoneID presence, this record contains of...
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