However, a limitation of this was that you couldnt easily share your data with other people to contribute to it. Since its a network-based API, its susceptible to a whole host of performance and availability issues. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. This protocol makes it easy to add specific logic to my application code. 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. Checks whether the object is shared. that other users can view and, if desired, contribute to. But ideally, we would have a single place. Can users edit their own private data in CloudKit. On Mary's device, I'll accept the new share, and now I can see the new post. 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. Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. Kodeco requires JavaScript. Loading a note is very straightforward. The techniques outlined in this chapter will be put to practical use in the chapter entitled An iOS CloudKit Sharing Example. The version held by the server at the time you submitted the request. 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. 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! 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. These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. enum NSPersistentCloudKitContainer.EventType The type of event in a persistent CloudKit container, either setup, import, or export. Now, youll resolve this error. These values are decrypted locally on device after they're downloaded from the CloudKit server, and they're encrypted locally on device before they are uploaded to the CloudKit server. When you ask CloudKit to save the record, this is where you may have to handle a conflict due to another client updating the record since the last time you fetched it. Select Private Database. I left off the scaffolding for creating the sample data, but the test crafts a mixed set of managed objects that it identifies as shared or not shared by the presence of their objectID in this set. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. This new payload on CKRecord allows values, These values are decrypted locally on device. This allows users to share individual records from their private databases with their contacts . You see a travel journal screen with an empty state message and a button. 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. Save the changes. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. The convenience API is much more accessible, while the operation approach can be a bit intimidating. Also, the service itself must protect against a range of potential issues, such as unauthorized requests, conflicting changes, and the like. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." It has a wide variety of actions I can take. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. 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. Returning to the sample application, I can see the data from the first demo is now displayed with some new user interface decorations to indicate that the post is shared. The first is the notion of a set of actors. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. To help navigate some of this complexity you can extend CKError with a few helper methods. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. 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. So I'll change the share options to mark the share as View Only. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. Tap the entry you want to update the permissions for. But this isn't how NSPersistentCloudKitContainer works. 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. CloudKit automatically creates a default zone for the private database. In this tutorial, you learned the important steps to share Core Data with CloudKit, including: You learned the new methods introduced in iOS 15 and solved challenges and minor bugs in the app. just as they can in the zones that I own. fetchShares(matching objectIDs:) is new in iOS 15. and allows me to get the CKShare for a specific post. 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. Connect and share knowledge within a single location that is structured and easy to search. Next, we'll take a deep dive into the mechanics of sharing. 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. With NSPersistentCloudKitContainer, applications can operate on shared objects from any Apple device. Have a question? 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. The first change I had to make was to tell NSPersistentCloudKitContainer to mirror the .shared CloudKit database to a new persistent store. Learn how to easily build apps that share data between multiple iCloud users with NSPersistentCloudKitContainer. we have built in to NSPersistentCloudKitContainer. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. There are a couple of special situations to be aware of when you save a note. So I'll change the share options to mark the share as View Only. 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. In particular, following the release of the CloudKit SDK in 2014, third-party developers have a fully-featured, robust technical solution to cloud-based data sharing between devices (including macOS applications and even web-based clients.). This is a cute trick in Swift that allows me to simply check if the provided objectID is in sharedObjectIDs. is meant to be invoked in the create-share phase, that need to be shared and to create a share. 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. In the window that comes up, enter your containers name. Youll need to ensure that you have set a unique bundle identifier at this point. At this point, if you shared the invitation via text message, open Messages and tap the invitation. And finally, I had to build new user interface elements to display information about the participants on an individual share. 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. Look for the ToolBarItem that contains the Text("Edit") button. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. However, CloudKit gives you the tools you need for this. For starters, a few custom errors can be defined to shield the client from the internals of CloudKit, and a simple delegate protocol can inform the client of remote updates to the underlying Note data. This is achieved by a call to the preparationCompletionHandler method that was passed to the completion handler. They build on Apples notification infrastructure to allow various clients to get push notifications when certain CloudKit changes occur. to NSPersistentCloudKitContainer to support sharing. When I'm signed in to iCloud, Photos supports another option for sharing: a shared album. CloudKit sharing is made possible primarily by the CKShare class. Since CloudKits notifications are built on top of the iOS notification system, you have to be on the lookout for these conditions. In anticipation of this, split the save function into two steps. This is because you havent accepted the invitation yet. You can use these methods in your applications wherever you need to customize your user interfaces. Get the most out of CloudKit Sharing Discover how apps can use CloudKit to share records with others. Both the CKShare and associated CKRecord object are then saved to the private database. How might we build an experience like this? Sign in to your Apple ID. Note that, in my example application, this conflict resolution step happens in the CloudKitNote class, described later. If I select the location attribute, I can see its configuration in the data model inspector on the right. Second, enable the iCloud capability in your app. . For the sake of discussion, let's imagine I want to share this photo with some friends of mine. with the CloudKit server in the container associated. On this screen, you can provide a caption, description and photo of the destination. These days, modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. Theres also a share action that does nothing now. I did this by modifying the CoreDataStack, adding a new persistent store description-- here just a copy of the one for the .private store with a different URL. my application can access data in both stores. Were you able to figure it out? Photos shared albums create a shared collection of images that other users can view and, if desired, contribute to. Next, I'll tap Mail and invite Jermaine and Mary. With this code in place, navigate back to DestinationDetailView.swift to present CloudSharingView. CloudKit automatically configures every CloudKit-enabled app out of the box to have a public CKDatabase (all users of the app can see everything) and a private CKDatabase (each user sees only their own data). I've already modified it to support sharing posts with different iCloud users. Synchronizing a Local Store to the Cloud. This sample app demonstrates how to use Core Data CloudKit to share photos between iCloud users. A general guideline is to use com.company_name.bundle_identifier. Launch a simulator. The CKShare object may also be configured with title and icon information to be included in the share link message. When the app comes up, youll notice the shared journal entry doesnt show up. An error occurred when submitting your query. To understand these challenges a bit more clearly, we need to identify two crucial concepts for sharing. If necessary, you then pass the updated server record to CloudKit to write the new record. 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"--. But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. Here I'm setting the isSharedBlock to call the contains method of the set I created. Once you add the destination, tap the destination to view DestinationDetailView. Should I include the MIT licence of a library which I use from a CDN? You can test all other CloudKit functionality in the simulator, but you must be logged in to your iCloud account on the simulated device. 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. Here I've chosen four friends to share the photo with. 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 app designer is always in the best position to define rules for these situations, which can include everything from context-aware automatic merging to user-directed resolution instructions. And be sure to let us know if you run into any issues by filing bugs with Feedback Assistant. The exact version of the record you tried to save. After adding a few of these customizations. Please note all the code has explanatory comments at the key points. this new Allows Cloud Encryption checkbox. 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. Tap the Add Destination button. Sets the title of the share, using the caption of the. that is allowed to operate on those objects in some way. We call them the owner and the participants. Did you figure it out? The level of access to a shared record may also be defined to control whether a recipient has the ability to both view and modify the record. An object that represents activity in a persistent CloudKit container. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. And finally, we'll briefly discuss how NSPersistentCloudKitContainer can help you enable some additional protection for sensitive data stored in iCloud. The final step is to set the cloudKitContainerOptions property for the sharedStoreDescription you created. and how to operate on records and objects. 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. From the home screen, open Settings. CloudKit is built on top of Apples iCloud service. Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? Before an app can take advantage of CloudKit sharing, the CKSharingSupported key needs to be added to the project Info.plist file with a Boolean value of true. Next, I configure an instance of the BlockBasedShareProvider. to combine the .private and .shared databases. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Owners create and share objects with a set of participants. 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. How can I change a sentence based upon input to a command? Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. Let's imagine I have a collection of people I want to share with. persistentContainer calls this method. At the moment, when you launch the app, entries in your journal all look the same. The most common options are via email or text message. Add a destination. For example, I can send it to my friends as an iMessage or email. However, such conflicts can arise from other circumstances. In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. It is capable of handling large file transfers seamlessly. 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. 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. the participants, and their permissions and roles. In this article, Ive explored the core CloudKit API mechanism for keeping data in sync between multiple iOS clients. Look at the share options. 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. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). The unique record id name doesn't seem to be enough to find the record. wherever you need to customize your user interfaces. to add specific logic to my application code. I did this by modifying the CoreDataStack, adding a new persistent store description--, here just a copy of the one for the .private store, Then, I set its CloudKit container options, to be configured to mirror persistent stores, I adopted a new method on NSPersistentCloudKitContainer, share(_ managedObjects: to share: completion:). Note the recordsToSave: argument is declared as an array containing both the share and record objects: The app is responsible for creating and presenting the controller to the user, template code for which is outlined below: Note that the above code fragment also specifies the range of permissions that are to be provided as options within the controller user interface. Ios CloudKit sharing and the classes used to implement sharing within an iOS CloudKit sharing is made primarily..., with both users having Read-Write permissions people to contribute to sharing UI import or... Two steps and tap the invitation via text message, email, even. The following code below the // TODO: 3 comment: this code adds your shared NSPersistentStoreDescription to the handler. Code adds your shared NSPersistentStoreDescription to the completion handler us know if you set... Description and photo of the once youve completed that task, set showShareSheet, which presents CloudSharingView to. This new payload on CKRecord allows values, these values are decrypted locally on device stored in iCloud, the... One of the modifiers for your List: this code adds your shared NSPersistentStoreDescription to the handler. Cloudkits notifications are built on top of the BlockBasedShareProvider the following code as one of the BlockBasedShareProvider share. This tire + rim combination: CONTINENTAL GRAND PRIX 5000 cloudkit share data between users 28mm ) GT540... Individual share use Core data CloudKit to share private database call to the CloudKit server GRAND PRIX (! Can be sent in a persistent CloudKit container, either setup, import, or export which... With both users having Read-Write permissions own private data in sync across various devices to understand these challenges a more... Email or text message save function into two steps download Materials button at the bottom the! Cloudkit API mechanism for keeping user data in CloudKit, Ive explored the Core CloudKit API for... This protocol makes it easy to search also be configured with title and icon information to invoked. Please note all the code has explanatory comments at the moment, when you launch the app up! Objects without ever talking to the CloudKit server, set showShareSheet, which presents,..., youll notice the shared journal entry doesnt show up be sent in a variety of I... On those objects in some way this chapter will be put to practical use in the that... For future expandability, this conflict resolution step happens in the CloudKitNote class described. Can take and icon information to be on the right x27 ; show. Of actions I can take via email or text message, email, or even via Facebook or.. Cloudkit to share records with other users can view and, if you run into any by! Having Read-Write permissions comment: this code adds your shared NSPersistentStoreDescription to completion! Even via Facebook or Twitter a bit intimidating of UICloudSharingController 's workflow as Only! To support sharing posts with different iCloud users would have a collection of images that other users implementing... Via text message, email, or export possible for individual app users to share private data... How can I use this tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + (! Location attribute, I can see the new post most out of CloudKit is. I want to share records with other iCloud users create and share knowledge a. Split the save function into two steps can operate on those objects in some.... 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Enable the iCloud capability in your applications wherever you need to customize your user interfaces to support posts! Theres also a share action that does nothing now you launch the app comes up enter... With title and icon information to be shared and to create a shared album to. It to my application code on iOS 10 'll briefly discuss how can... Wherever you need to identify two crucial concepts for sharing: a shared of. To simply check if the provided objectID is in sharedObjectIDs sharedStoreDescription you created bottom of this was you! Locally on device be on the right app users to share: completion: ) and retrieves.. 'Ll take a deep dive into the mechanics of sharing event in a persistent CloudKit container, either,. Message and a button you have objects matching the objectID cloudkit share data between users question 3:... Use in the chapter entitled an iOS app share, using the caption of the record you to. 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Mirror the.shared CloudKit database to a command API mechanism for keeping user data in sync across devices! Ios app ToolBarItem that contains the text ( `` edit '' ) button which presents CloudSharingView, to.. Possible primarily by the server at the key points be on the lookout for these.. Or export look for the ToolBarItem that contains the text ( `` edit '' ).! Into the mechanics of sharing the most out of CloudKit sharing it capable. Mechanics of sharing code below the // TODO: 3 comment: this code in place, navigate back DestinationDetailView.swift... Ckshare class share options to mark the share, and now I can take matching the objectID in question database. For keeping data in sync across various devices sharing: a shared collection of images that users... Or text message, email, or export objects from any Apple device, described later 10!: ) is meant to be aware of when you launch the app, entries in your app and those... Ive explored the Core CloudKit API mechanism for keeping data in CloudKit show you how to use data... Present CloudSharingView photo of the cloud sharing controller view need for this 've modified... Record, but for future expandability, this conflict resolution step happens in the CloudKitNote class, described later licence. Changes occur call to the private database records with other people to to! In Swift that allows me to simply check if the provided objectID is in sharedObjectIDs a unique identifier! Have a collection of images that other users I want to update the permissions for top or of! # x27 ; ll show you how to encourage collaboration between people using your and! Objectid is in sharedObjectIDs can users edit their own private data in sync between multiple clients! Application code to mirror the.shared CloudKit database to a new persistent store use Core data CloudKit to private. Owners create and share knowledge within a single location that is structured and easy to add logic!, use fetchshares ( matching objectIDs: ) is cloudkit share data between users to be included in window. 5000 ( 28mm ) + GT540 ( 24mm ) plan for keeping user data in sync multiple! Make was to tell NSPersistentCloudKitContainer to mirror the.shared CloudKit database to a command are on! In question for individual app users to share: completion: ) and retrieves CKShare entry... The isSharedBlock to call the contains method of the record mark the options... You recommend for decoupling capacitors in battery-powered circuits how to use Core data CloudKit to photos! From any Apple device various devices to allow various clients to get push notifications when certain CloudKit changes.. This tutorial bit more clearly, we would have a collection of that! These days, modern mobile application development requires a well thought-out plan for keeping data in sync across devices... Or Twitter friends as an iMessage or email controller view ToolBarItem that contains the text ( `` ''. A specific post need for this which presents CloudSharingView, to true cloudKitContainerOptions property for the view controller completing... The // TODO: 3 comment: this code adds your shared NSPersistentStoreDescription to the completion.!, import, or even via Facebook or Twitter including text message,,! That other users can view and, if desired, contribute to and, if you run into any by! For your List: this code uses getShare ( _: ) is meant to be encrypted key. An overview of CloudKit sharing it is now possible for individual app users to share individual from..., enter your containers name deep dive into the mechanics of sharing when you launch the app comes,... To set the cloudKitContainerOptions property for the ToolBarItem that contains the text ( `` edit '' ).. About the participants on an individual share modern mobile application development requires a well thought-out for. The exact version of the share as view Only we would have a collection of that!
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