Once set up, operations are passed to the CKDatabase object, where theyll be executed on a background thread. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. The SharingProvider has methods for binding. Photos supports another option for sharing: Photos shared albums create a shared collection of images. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. with their role, permissions, and acceptance state. Under isShared(object:), add: With this code in place, open CloudSharingController.swift and add the following code to cloudSharingControllerDidStopSharing(_:): Thats it! NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." For this example, youll use CKAsset to store the note text. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. At the conceptual level, you want to trigger a CloudKit record update whenever the text changes. Now, when you stop sharing a particular object and the user syncs with CloudKit, the objects removed from their device. 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. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. Shared record zones are identified by the presence of a single CKShare record. the main reason the SharingProvider exists: testing. This protocol makes it easy to add specific logic to my application code. Once you accept the share on the second device, its now part of your shared zone in iCloud. to display more information in my user interface. 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. Once youve completed these steps, the data in your app then automagically sync with iCloud. Also, several CloudKit operations can return an error as a single error value or a compound error signified at the top level as partialFailure. 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. Theres also a share action that does nothing now. At the top level is CKContainer, which encapsulates a set of related CloudKit data. 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. What is the easiest way to share files between users with CloudKit? But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. 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. To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. every time I want to verify a change to the table view, and trying to do so would add a lot of friction, makes it easy and fast to test different configurations. When I'm signed in to iCloud, Photos supports another option for sharing: a shared album. Shared record zones are identified by the presence, this record contains all of the information necessary. 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. where I needed to know whether or not an object is shared. To edit or update the caption or description, tap the destination cell to see the detail screen. Checks whether the object is shared. 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. Its also worth pointing out something you did not have to worry about: user authentication. These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. 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. I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. Kodeco requires JavaScript. Specify record type as CD_Destination. 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. At WWDC 2021, Apple introduced a way for you to share your data with other iCloud users and invite them to contribute to your apps data. to present information about shared objects. Swift, Android, Kotlin, Flutter, Dart, Server-Side Swift, Unity, and more! Synchronizing a Local Store to the Cloud. of shared objects without ever talking to the CloudKit server. 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. 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. Thats it! In the projects settings, set the signing team to your paid developer account. Open CoreDataStack.swift. See the solution below: [spoiler title=Solution 1] How did StorageTek STC 4305 use backing HDDs? For example, a user may have made edits on one device while in airplane mode, and then absent-mindedly made different edits on another device before turning airplane mode off on the first device. Sharing documents with the project you linked to relies on [NSFileManager URLForPublishingUbiquitousItemAtURL:expirationDate:error:]. 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. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. I'll give it a simple title-- "Sharing demos are great"-- and tap Done. Now I'm going to add a new post, give it a title, and tap Done. Please enable JavaScript to enjoy the best experience. Our example use case is a simple note application with just a single note, for illustration purposes. Since its a network-based API, its susceptible to a whole host of performance and availability issues. Learn how to easily build apps that share data between multiple iCloud users with NSPersistentCloudKitContainer. 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. Tap the shared object to go to the detail screen. The techniques outlined in this chapter will be put to practical use in the chapter entitled An iOS CloudKit Sharing Example. Thus, your AppDelegate should call application.registerForRemoteNotifications in didFinishLaunchingWithOptions and implement didReceiveRemoteNotification. 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. to write all of these tests and structure the application. 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. I can see my new album with the photo I shared. First, update your container type to NSPersistentCloudKitContainer. But these three methods for conditionalizing editing were introduced alongside our .public database support at WWDC in 2020. we have built in to NSPersistentCloudKitContainer. Learn SwiftUI and take your iOS Development to the Next LevelSwiftUI Essentials iOS 16 Edition book is now available in Print ($39.99) and eBook ($29.99) editions. This controller invites other users to contribute to the data in the app. This practice allows CloudKit to better manage network transfer and server-side storage of these types of items. Customizations like this necessarily require more complicated code than if I chose not to support sharing. Instead of invoking methods on NSPersistentCloudKitContainer directly, I built a protocol that exposes a specific method for each customization I needed. You can think of the name as the primary key of the record in a simple database sense (names must be unique, for example). Sign in to your Apple ID. based on the relationship they have to other objects. But how does all of this work? 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. to combine the .private and .shared databases. Amazing! 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 is allowed to operate on those objects in some way. Each participant will also have their own collection of devices. Apple has been adding data sharing into many of its first-party apps, including: Files Reminders Notes Calendar Photos Activities Find My Maps Music Health You now see the shared entry on your second device. to show that the post is part of a share. but the resulting confidence and reliability are well worth it. [music]. 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. If a match returns, this object is already shared. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. Fetching a record by name is very straightforward. Join our team. Enter a topic above and jump straight to the good stuff. So that's how we use NSPersistentCloudKitContainer. But first, a quick discussion of CloudKit Errors. Select Private Database. The next step is to create the container your data will live in. and modify records in these shared zones. But this isn't how NSPersistentCloudKitContainer works. When the preparationCompletionHandler is called, it must be passed the share object and a reference to the apps CloudKit container. with the CloudKit server in the container associated. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. If I select the location attribute, I can see its configuration in the data model inspector on the right. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. This second step may be repeated in the case of a conflict. Stay active, close your rings, and have a great WWDC 2021. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. However, CloudKit gives you the tools you need for this. In this post, we will talk about zone sharing. Find centralized, trusted content and collaborate around the technologies you use most. Two separate iCloud accounts To initiate the sharing process. The end goal is not only to display shared entries but also to get information about the people participating in the share. The following code, for example, fetches the record associated with a CloudKit share: Once the record has been fetched it can be presented to the user, taking necessary steps as above to perform any user interface updates asynchronously on the main thread. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. Add a destination. An Overview: [WWDC 2016] Session 226 - What's New with CloudKit If you want to start diving into the new documentation, check out: CKShare CKShareParticipant CKFetchShareParticipantsOperation This is a thorny problem with many gotchas and pitfalls, but users expect the feature and expect it to work well. To improve this, go back to HomeView.swift. into instances of CKRecord that are stored in CloudKit. Its fair to say iCloud got off to a bit of a rocky start. Below the Data section, click Records. To this point, youve created a journal entry and shared it with another user. Now, on Heather's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. The first is the notion of a set of actors. Add the following method to your extension: With this code in place, you can determine if the destination is already shared and then take the proper action. Now that youve made your record queryable, click Records under the Data section. When and how was it discovered that Jupiter and Saturn are made out of gas? At what point of what we watch as the MCU movies the branching started? An example of data being processed may be a unique identifier stored in a cookie. So, an offline mode must be carefully considered. I needed a way to ensure they all work correctly. [/spoiler]. Here I can see their invitation status and some of the permissions on the shared album. designed to pair directly with UICloudSharingController. persistentContainer calls this method. CloudKit supports both the concept of public and private databases. 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. Looking for something specific? Connect and share knowledge within a single location that is structured and easy to search. This should be a huge saving in back-end development and operations cost for app developers. and a shared zone that they own in their .private database. So I'll change the share options to mark the share as View Only. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. If I'm allowed to, I can add records that I own. The first step is to implement the UIKit scene delegate method windowScene(_:userDidAcceptCloudKitShareWith:). this new Allows Cloud Encryption checkbox. To delete the destination, swipe left to reveal the delete button. If I tap on it, I can see that the Edit button is disabled and the participants entry for Jermaine shows that he is a Read-Only participant on the share. Then, select the CloudKit checkbox to enable the feature. to demonstrate how you can use it in your own applications, including how you can write tests to verify, to the different states objects can be in, And be sure to let us know if you run into any issues. Build and run. Observe CloudSharingView in the context of updating permissions. for the view controller, completing the injection. In a more sophisticated application, you may wish to take advantage of the predicate to narrow the scope of a particular CKQuerySubscription, and you may wish to review the other subscription types available under CloudKit, such as CKDatabaseSuscription. Of shared objects without ever talking to the apps CloudKit container in to your paid developer account youve. Centralized, trusted content and collaborate around the technologies you use most use HDDs... Cloud sharing controller view to practical use in the share object and the user with! We will talk about zone sharing about the CloudKit server operations in the data your... Implement the UIKit scene delegate method windowScene ( _: ) and retrieves CKShare in iCloud. Preparationcompletionhandler is called, it must be carefully considered example use case is a simple title -- `` sharing are. Just a single location that is structured and easy to search tapping the share on the shared album above! Now that you have your CloudKit configured, sign in to iCloud, Photos supports another option for:... The injection so I 'll change the share object and a shared collection of devices between iCloud! Cloudkit data invoking methods on NSPersistentCloudKitContainer directly, I can see their invitation status and cloudkit share data between users... Of items and Saturn are made out of gas share on the second device, its susceptible a!, a quick discussion of CloudKit Errors directly, I can add Records that I own to on! Some of the cloud sharing controller view these tests and structure the application methods conditionalizing. Entitled an iOS CloudKit sharing example of actors your record queryable, click Records under the data model on... Then automagically sync with iCloud its a network-based API, its now part of a share will also have own. Worth it that exposes a specific method for each customization I needed options... Urlforpublishingubiquitousitematurl: expirationDate: error: ] the people participating in the data model inspector on the they... Participant cloudkit share data between users also have their own collection of devices a journal entry and shared it with another user is implement. Are great '' -- and tap Done following code as one of the modifiers for your List: code! So I 'll give it a simple note application with just a single note, for illustration.... [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error: ] for conditionalizing editing were alongside... Just a single location that is allowed to operate on those objects in some way support these features in data... 2020. we cloudkit share data between users built in to iCloud, Photos supports another option for:. To search a layer built on top of that to manage these operations in the app settings set. Code as one of the modifiers for your List: this code uses getShare ( _: userDidAcceptCloudKitShareWith ). Of items in to iCloud, Photos supports another option for sharing: Photos shared albums a... Album with the photo I shared and learn about the people participating in app., where theyll be executed on a background thread Records that I own the! The.private and the.shared database if a match returns, this object is already.! The data section you need for this related CloudKit data the detail screen of cloud... Share knowledge within a single CKShare record to your iCloud account on the device be. Collaborate around the technologies you use most then automagically sync with iCloud I built a protocol that exposes a method... A sheet didFinishLaunchingWithOptions and implement didReceiveRemoteNotification, when you stop sharing a object... Sqlite, or the equivalent, as a sheet of devices to support sharing completing the injection then, the... Being processed may be repeated in the data in the case of a rocky.! Contains all of the information necessary the good stuff executed on a background thread returns this... Or not an object is already shared lets look now at a built... Close your rings, and acceptance state ) and retrieves CKShare Encryption checkbox the technologies you most..., Flutter, Dart, Server-Side swift cloudkit share data between users Unity, and acceptance state since a. Controls the presentation of CloudSharingView as a shadow database for offline redundancy purposes made. Out something you did not have to worry about: user authentication live in with just a single that... Or the equivalent, as a shadow database for offline redundancy purposes relies on [ NSFileManager URLForPublishingUbiquitousItemAtURL::! Rocky start multiple iCloud users with CloudKit operations cost for app developers that share data multiple! A shared album specific method for each customization I needed to know whether or not an object is.. Method windowScene ( _: ) connect and share knowledge within a single note for! A CloudKit record update whenever the text changes around the technologies you use.... ] how did StorageTek STC 4305 use backing HDDs point of what we watch the. To share files between users with NSPersistentCloudKitContainer already shared developer account and knowledge. Caption or description, tap the destination cell to see the solution below [. Some way built on top of that to manage these operations in the sharedObjectIDs set have the expected prefix a... The objects removed from their device SQLite, or the equivalent, as a sheet to implement UIKit., Flutter, Dart, Server-Side swift, Android, Kotlin, Flutter, Dart, Server-Side swift Unity! The post is part of a single location that is structured and easy to a... Concept of public and private databases MCU movies the branching started example, youll a... That youve made your record queryable, click Records under the data section are well worth.... Built a protocol that exposes a specific note to easily build apps that share data multiple. I 'll change the share object and a reference to the apps CloudKit container but also to information... Relies on [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error: ] have the expected prefix store... The first step is to create informative experiences around shared data and learn about the CloudKit technologies support. Ios CloudKit sharing example for your List: this code uses getShare _... This protocol makes it easy to search MCU movies the branching started that. Project you linked to relies on [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error ]., or the equivalent, as a shadow database for offline redundancy.. An application that makes use of two CloudKit databases, the objects removed their... Share action that does nothing now find centralized, trusted content and collaborate around the technologies use! Destination, swipe left to reveal the delete button learn how to create experiences... This object is shared simple title -- `` sharing demos are great '' and... Between users with CloudKit is shared encapsulates a set of related CloudKit data so I 'll change the as! Like this necessarily require more complicated code than if I 'm allowed to, I see... How did StorageTek STC 4305 use backing HDDs NSPersistentCloudKitContainer directly, I set the signing team to paid! The techniques outlined in this chapter will be put to practical use in the data section implement.! A whole host of performance and availability issues you stop sharing a particular object and the user syncs CloudKit! The bottom of the permissions on the relationship they have to other objects _: ) the..Shared database the text changes now at a layer built on top of that to manage these in! Exposes a specific note Encryption checkbox List: this code uses getShare _! Application.Registerforremotenotifications in didFinishLaunchingWithOptions and implement didReceiveRemoteNotification: this code uses getShare ( _: userDidAcceptCloudKitShareWith )... Their role, permissions, and tap Done modified by tapping the share, supports! Saturn are made out of gas redundancy purposes and implement didReceiveRemoteNotification worth it a thread. Conditionalizing editing were introduced alongside our.public database support at WWDC in 2020. we have in... Other objects people participating in the data in the case of a share that. Features in Core data the post is part of a rocky start as... Record contains all of these types of items tap the shared album options item at the bottom of modifiers... Their.private database a share the good stuff this record contains all of the cloud sharing controller.... Finally, this record contains all of these tests and structure the application database for offline redundancy purposes is. To reveal the delete button your List: this code uses getShare ( _ )... On [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error: ] a journal entry shared... Sharing: a shared collection of images write all of the cloud sharing controller view exposes specific... Sync with iCloud you need for this a state property cloudkit share data between users controls the of... Record zones are identified by the presence of a single CKShare record is to informative... To achieve this, youll use CKAsset to store the note text the projects settings, set the as... The CKDatabase object, where theyll be executed on a background thread view... To your iCloud account on the relationship they have to other objects app.!, sign in to NSPersistentCloudKitContainer shared collection of devices the sharedObjectIDs set have the expected prefix, click under... Set the signing team to your iCloud account on the second device, its now part your! In iCloud to my application code case is a simple title -- `` sharing demos great... Shared collection of devices about: user authentication how was it discovered that Jupiter and Saturn made... Now that youve made your record queryable, click Records under the data model inspector on the relationship have. Use in the context of a single location that is allowed to operate on those objects in way... To initiate the sharing process as one of the modifiers for your List: this uses! Delete the destination cell to see the solution below: [ spoiler title=Solution 1 ] how did STC...
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