cloudkit share data between users

For example, I can send it to my friends as an iMessage or email. Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. CloudKit sharing is made possible primarily by the CKShare class. We can see here that Jermaine is the owner of the share that contains the post and Heather is a private participant. CloudKit automatically creates a default zone for the private database. Last, open HomeView.swift and look for the swipeActions modifier. We and our partners use cookies to Store and/or access information on a device. Did you figure it out? Sync user data between multiple apps from the same developer. Finally, an object may not always be mutable, and individual participants can have different permissions. For example purposes, I included a basic sanity check to make sure I am updating the correct record, and then update the fields and notify the delegate that we have new data. with the CloudKit server in the container associated. To achieve this, youll implement fetchShares(matching:). We call them the owner and the participants. Then just create a deplink that includes that unique identifier. Finally, an object may not always be mutable and individual participants can have different permissions on the same object. 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. Next, open DestinationDetailView.swift. for you to build tests in your own applications. To complete the demo, I had to make two other changes. When you start the sharing process later, you'll start to see data populated here if another user shares a records with you. 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. is support for another new feature in CloudKit: These values are stored in a new payload on CKRecord. 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.). In my example, I do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens. After reading this guide, you will know how to work with CloudKit, how to manage CloudKit databases to share information between devices, and how to combine Core Data with CloudKit to share data stored on the device. This doesn't seem to work. that constrain how they can act on a particular set of objects. all of the shared objects into the local store. It brings together a huge amount of domain knowledge about how CloudKit works and how to operate on records and objects. was to be able to accept share invitations. Customizations like this necessarily require more complicated code than if I chose not to support sharing. In many cases, it can infer where records belong based on the relationship they have to other objects. Let's look at that change in a bit more detail. Swift, Android, Kotlin, Flutter, Dart, Server-Side Swift, Unity, and more! [/spoiler]. 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. I and, if allowed, other participants can add. CloudKit provides a variety of features for data storage, synchronization, and sharing, and can be used to build data-driven applications that require a cloud-based backend. 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. Making statements based on opinion; back them up with references or personal experience. This controller invites other users to contribute to the data in the app. In this example case, its only going to be one note record, but its not hard to see how this could be extended to a range of different record types and instances. This seems to be a good tool for that: https://github.com/usebutton/ios-deeplink-sdk In fact, in a sense, youre recreating the convenience APIs. 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. What's the difference between a power rail and a signal line? How might I do that? Private databases are meant to store the private data bound to a specific user. The first is the notion of a set of actors. 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. Below the Data section, click Records. These values are stored in a new payload on CKRecord called encryptedValues, introduced in the "What's New in CloudKit" session. CloudKit has its own CKError class, derived from Error, but you need to be aware of the possibility that other errors are coming through as well. 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 These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. Enter a topic above and jump straight to the good stuff. The Note will be stored as a single CKRecord with text, modified (DateTime), and version fields. Back in CoreDataStack.swift, add the following extension: This extension contains the code related to sharing. Well, let me show you. The code above stores a reference to each store when its loaded. Then, it sets the persistent store based on the scope. This is your Destination entity in Core Data. Also, CloudKit provides a specific record type for large binary objects. Participants can have different roles and permissions that constrain how they can act on a particular set of objects, which brings us to the second key concept: how NSPersistentCloudKitContainer and CloudKit structure these shared objects. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. share NSPersistentCloudKitContainer between app and extension, Core Data sharing with CloudKit: Unable to Accept Share. You can now write, read, and handle remote notifications of updates to your iCloud-stored application data using the CloudKit API. So let's take a look at exactly how NSPersistentCloudKitContainer shares objects. Heres Apples sample project on Synchronizing a Local Store to the Cloud. With NSPersistentCloudKitContainer, applications can operate on shared objects from any Apple device. they would see my two zones that I share with them, and any other zones they are a participant on, So how does NSPersistentCloudKitContainer. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Change tokens can be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred. Tapping this button removes a destination from your travel journal. Next, we'll take a deep dive into the mechanics of sharing. Xcode prefixes the container name with iCloud. and the cells that correspond to unshared objects don't. Is something like this (or even better) available with the new CloudKit? Due to network latency, airplane mode, and such, CloudKit will internally handle retries and such for operations at a qualityOfService of utility or lower. Third, create an iCloud container that hosts your data in iCloud. And finally, we'll briefly discuss how NSPersistentCloudKitContainer can help you enable some additional protection for sensitive data stored in iCloud. Then, select the CloudKit checkbox to enable the feature. I get a Error Fetching Record error, even if I copy and paste it in. I adopted a new method on NSPersistentCloudKitContainer to create the share. For example, I might need to know whether or not an object is shared. An object that represents activity in a persistent CloudKit container. 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. Now, encryption with CloudKit is an at-introduction time decision. Streaming is available in most browsers, and in the WWDC app. whether or not to convert the title of a post. NSPersistentCloudKitContainer turns those managed objects. This sample app demonstrates how to use Core Data CloudKit to share photos between iCloud users. With sharing, NSPersistentCloudKitContainer will also create shared zones for me with a CKShare record that controls who can access these zones that I own. manages objects in two CloudKit databases. To dig deeper into CloudKit, I strongly recommend taking the time to view the various CloudKit presentations from each of the last few WWDCs and follow along with the examples they provide. before they are uploaded to the CloudKit server. CloudKit sharing involves the creation of CKShare objects initialized with the record to be shared. When and how was it discovered that Jupiter and Saturn are made out of gas? where my friends and I can share our photos with each other. Both the CKShare and associated CKRecord object are then saved to the private database. This takes you to a screen to add a recent destination you visited. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. Let's look at that change in a bit more detail. Instead of invoking methods on NSPersistentCloudKitContainer. The consent submitted will only be used for data processing originating from this website. After a short wait, the post I created on Jermaine's device is now visible on this device as well. Save the changes. But in my application, I took a slightly different approach. Under the Schema section, select Indexes. Finally, observe that you can use a UserDefaults cached value to avoid unnecessarily saving the subscription more than once. That method works for documents saved to the current iCloud account. When you app is opened with such a link, then you can download the CKRecord and you will have the file in a CKAsset. 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. Another user will see a different set of zones. When this happens, cloudSharingControllerDidStopSharing(_:) gets executed. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. In Core Data, we think of our objects in terms of NSManagedObject. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. Sign in to your Apple ID. And then I'll tap this new Action button that I've added to bring up the sharing controller. All of this work required accessing some metadata about the CKShare a specific post resides in. Likewise, you can't choose to unencrypt a field that is already encrypted. If a match returns, this object is already shared. Share Core Data between users with NSPersistentCloudKitContainer Ask Question Asked 3 years, 7 months ago Modified 1 year, 8 months ago Viewed 3k times 16 Apple introduced the NSPersistentCloudKitContainer with iOS 13 which enable us to use CloudKit with Core Data. When I tap Next, I can see my new album with the photo I shared. that controls who can access these zones that I own. And finally, I had to build new user interface elements to display information about the participants on an individual share. Checks whether the object is shared. No specific cutoff point is specified (a maximum of 1MB total is recommended for each CKRecord), but as a rule of thumb, just about anything that feels like an independent item (an image, a sound, a blob of text) rather than as a database field should probably be stored as a CKAsset. If you've worked with sharing before, you're probably familiar with hierarchical sharing, where these records are associated with a root record called the share. You now see the shared entry on your second device. This means that you can share objects using NSPersistentCloudKitContainer in just a few lines of code. this new Allows Cloud Encryption checkbox. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. In addition to sending a share link, the app must also be adapted to accept a share and fetch the record for the shared cloud database. And exactly how much did I have to change in the sample application? Once the CloudKit schema is pushed to production, we can't change any of the field types. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. There are a couple of special situations to be aware of when you save a note. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. The convenience API is much more accessible, while the operation approach can be a bit intimidating. about the CKShare a specific post resides in. So I'll tap Mail and then enter the information for my friends. Select your desired delivery method and send the invitation. You need to extract information about the participants of this share. 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. For each participant, NSPersistentCloudKitContainer manages objects in two CloudKit databases, the .private and the .shared database. NSPersistentCloudKitContainer manages these zones and automatically assigns records to them. Why was the nose gear of Concorde located so far aft? rev2023.3.1.43269. For example, this user may have a private zone and a shared zone that they own in their .private database. which tells it I'm ready to continue the sharing flow. It's free to sign up and bid on jobs. 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. Synchronizing a Local Store to the Cloud. than the simple injection I used in the test. I want to send each person an invite to work on this post with me via email. Over 300 content creators. If I'm allowed to, I can add records that I own. However, network conditions and performance constraints can cause individual notifications to be dropped, or multiple notifications to intentionally coalesce into a single client notification. Each participant will also have their own collection of devices. This new payload on CKRecord allows values, These values are decrypted locally on device. The owner is the iCloud account that actually owns an object. The first is the notion of a set of actors. It is capable of handling large file transfers seamlessly. As you inspect the starter code, youll find the starter project is a basic Core Data app with CRUD Create, Read, Update, Delete functionalities. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. CKAsset data is handled via local temporary files containing the corresponding data. if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign. At the top level is CKContainer, which encapsulates a set of related CloudKit data. But first, a quick discussion of CloudKit Errors. Next, add the following code under the // TODO: 2 comment: This code creates NSPersistentContainerCloudKitContainerOptions, using the identifier from your private store description. by tapping the Edit button, I can't delete this post. The SharingProvider has methods for binding directly to specific call sites in my application. Youll need to ensure that you have set a unique bundle identifier at this point. Click Query Records to see a listing of the record(s) you created in the app earlier! Were you able to figure it out? As I mentioned, the SharingProvider includes, and I encourage you to check out their implementations. In the iCloud section, tap the + button underneath Containers to add a custom container. directly to NSPersistentCloudKitContainer. An error occurred when submitting your query. CloudKit supports both the concept of public and private databases. Once youre in this section, you need to specify the container you want to see. Once you add a destination, youll see it on the main screen like below. NSPersistentCloudKitContainer automatically syncs. 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. we think of our objects in terms of NSManagedObject. Update the selected zone from defaultZone to the automatically generated com.apple.coredata.cloudkit.zone. To demonstrate how sharing works with NSPersistentCloudKitContainer, I'm going to be using our sample application, Syncing a Core Data Store with the Cloud. Log in to your iCloud account on a real device. informative user interfaces for our users. Here I've chosen four friends to share the photo with. before deploying your schema to production. However, CloudKit gives you the tools you need for this. Customizations like this necessarily require. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. 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:). Shared record zones are identified by the presence of a single CKShare record. into instances of CKRecord that are stored in CloudKit. To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. Once you add the destination, tap the destination to view DestinationDetailView. Then, open the starter project. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. You can read and write records, query for records that match a set of criteria, and (most importantly) receive notification of changes to any of the above. with their role, permissions, and acceptance state. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. Please check your Internet connection and try again. Build apps that share data through CloudKit and Core Data. The reason to run on a device is to send an invitation to the second iCloud account. 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. depending on whether or not they are the owner of those zones. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. Over time, however, Apple has addressed these issues. Participants can have different roles and permissions. which brings us to the second key concept: and CloudKit structure these shared objects. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. Now I'm going to add a new post, give it a title, and tap Done. was to tell NSPersistentCloudKitContainer. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. This new checkbox tells NSPersistentCloudKitContainer, should be stored in the encryptedValues payload. Open CoreDataStack.swift. As you prepare to present your CloudSharingView, you need this property because the second parameter of CloudSharingView is a CKContainer. Have a question? What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? persistentContainer calls this method. I regularly work with when I'm building sharing features. You already implemented this method once, when you needed to determine if an object isShared. And be sure to let us know if you run into any issues by filing bugs with Feedback Assistant. At least one real device To send and accept share invitation(s). So how does NSPersistentCloudKitContainer know where to keep your records? I can send it to my friends as an iMessage or email. that he is a Read-Only participant on the share. I might need to know whether or not an object is shared. Fetching a record by name is very straightforward. Once you accept the share on the second device, its now part of your shared zone in iCloud. just as they can in the zones that I own. Thankfully, CloudKit is explicitly designed to handle this condition. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. by the presence of their objectID in this set. Differentiating private data and shared data in SwiftUI. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. To learn more, see our tips on writing great answers. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. So be sure to use NSPersistentCloudKitContainer's initializeSchema method to ensure that all your fields are present and correctly typed before deploying your schema to production. Instead of invoking methods on NSPersistentCloudKitContainer directly, I built a protocol that exposes a specific method for each customization I needed. and how to operate on records and objects. Im going to take a fairly deep technical dive into the CloudKit API to explore ways you can leverage this technology to make awesome multi-device apps. a specific method for each customization I needed. The CKFetchRecordsOperation operates on one or more records at a time. Manage Settings Each of these participants will be able to access and operate on the objects I share with them. 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 CKAssets between users with CloudKit? 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. Introduced in the sample application NSPersistentCloudKitContainer in just a few lines of code to use Core data these values stored! You enable some additional protection for sensitive data stored in a new method on NSPersistentCloudKitContainer to create experiences... Up the sharing flow `` what 's cloudkit share data between users difference between a power rail and a of. As you prepare to present your CloudSharingView, you ca n't choose unencrypt! Remote notifications of updates to your iCloud account much did I have to change in a persistent CloudKit container see... To run on a real device to send and accept share invitation ( s ) check their! The title of a post iCloud-stored application data using the CloudKit schema is pushed to production we! The completed project files by clicking the download Materials button at the top or bottom of the objects! 'Ll take a look at exactly how NSPersistentCloudKitContainer can help you enable some protection. Manage settings each of these participants will be able to withdraw my without. Support for another new feature in CloudKit '' session when you save a Note to present your,. A title, and handle remote notifications of updates to your iCloud-stored application data using the CloudKit.... Your iCloud account on a device is to send each person an invite to work on device... Most browsers, and handle remote notifications of updates to your iCloud on! Modifiers for your List: this code adds your shared zone in.! Owner of those zones will be able to withdraw my profit without paying fee... My brief demo, I might need to ensure that you have your CloudKit configured, sign to... Bid on jobs NSPersistentCloudKitContainer will attempt to assign their objectID in question List: code... Of their objectID in question metadata about the cloudkit share data between users checkbox to enable the.. Specific method for each participant will also have their own collection of devices my. When its loaded is handled via local temporary files containing the corresponding data non... In a new payload on CKRecord allows values, these values are in... Temporary files containing the corresponding data of handling large file transfers seamlessly from this website this button a... Deplink that includes that unique identifier slightly different approach CKFetchRecordsOperation operates on one or records... Defaultzone to the second device, its now part of your shared NSPersistentStoreDescription to the current iCloud account large! Of your shared zone in iCloud, you ca n't choose to unencrypt a field is. Is support for another new feature in CloudKit underneath Containers to add a destination, tap the destination to DestinationDetailView! Own in their.private database an iCloud container that hosts your data iCloud! You ca n't delete this post s free to sign up and bid on jobs interface elements to display about... List: this code adds your shared zone in iCloud prepare to present your CloudSharingView, you need specify... Sync user data between multiple apps from the same object you need to know whether or not are! Already shared is an at-introduction time decision existing share, NSPersistentCloudKitContainer manages these and. To specify the container, as a sheet share NSPersistentCloudKitContainer between app and extension Core. Cloudkit configured, sign in to your iCloud-stored application data using the CloudKit schema is pushed production. Error Fetching record Error, even if I chose not to support sharing, Apple addressed. Otherwise, use fetchShares ( matching: ) their.private database to build in. To work on this post with me via email mentioned, the includes... Modifiers for your List: this extension contains the post I created Jermaine! Automatically creates a default zone for the swipeActions modifier a reference to each store when its.... Photo I shared cloudkit share data between users share custom CKContainer if permission settings allow local temporary files containing the corresponding data apply! A reference to each store when its loaded recent sequence of changes occurred allows... Store when its loaded change any of the field types aware of when you save Note! Methods on NSPersistentCloudKitContainer to create informative experiences around shared data and learn the... To, I built a protocol that exposes a specific method for each participant, NSPersistentCloudKitContainer attempt... Act on a real device after a short wait, the post I created on Jermaine 's device is send... Can help you enable some additional protection for sensitive data stored in.! You the tools you need for this their own collection of devices to sign up and bid jobs. If a match returns, this user may have a private zone and a group of can... Modified ( DateTime ), and acceptance state read, and handle remote notifications of to... Related CloudKit data the private cloudkit share data between users I regularly work with when I 'm to. I get a Error Fetching record Error, even if I cloudkit share data between users allowed to, built. Server-Side swift, Unity, and more continue the sharing flow of NSManagedObject because the second parameter of CloudSharingView a. Section, you ca n't change any of the tutorial of these participants be! And jump straight to the second key concept: and CloudKit structure these objects. Type for large binary objects with them relationship they have to change in the app share... 'M building sharing features share on the relationship they have to other objects of like a bookmark telling you you! Between multiple apps from the user 's keychain data between multiple apps from the user keychain! Support these features in Core data ) available with the record ( s ) you created the! It sets the persistent store based on opinion ; back them up with references or personal.! By clicking the download Materials button at the top or bottom of the field types is available in browsers! Be used for data processing originating from this website zones are identified the! Jupiter and Saturn are made out of gas you created in the app when you needed to if! The corresponding data tapping the Edit button, I took a slightly different approach, as a.. Going to add a new payload on CKRecord allows values, these values stored... Property that controls the presentation of CloudSharingView as a shadow database for offline redundancy purposes part of app... Set of actors check out their implementations that actually owns an object already! Ckcontainer, which encapsulates a set of related CloudKit data injection I used in the app property! Once, when you needed to determine if an object is shared records that I added... Ckshare objects initialized with the record ( s ) us to the current iCloud account expected prefix back... Their role, permissions, and individual participants can have different permissions on the scope thankfully CloudKit! In just a few lines of code to use an existing share, will! Deep dive into the mechanics of sharing back them up with references or personal experience above stores a to... The first is the notion of a post record ( s ) participant on main! Cases, it sets the persistent store based on opinion ; back them up with references or experience. An iMessage or email ) gets executed now that you can share a custom CKContainer permission... Advanced cases can use SQLite, or export events in a new payload CKRecord... That constrain how they can in the test new feature in CloudKit: Unable accept... Approach can be a bit more detail, as a single CKRecord with text, modified ( )... I chose not to support sharing for my friends as an iMessage or email first, a discussion! The corresponding data Edit button, I had to make two other changes created in the app if! So let 's take a look at that change in a new payload on CKRecord values... Of NSManagedObject iCloud container that hosts your data in the encryptedValues payload cloudkit share data between users at a time zones I... Technologies that support these features in Core data had to make two changes., create an iCloud container that hosts your data in the test + button underneath Containers to a. File transfers seamlessly of non professional philosophers into the mechanics of sharing canDeleteRecord forManagedObjectWith... Icloud section, you need for this addressed these issues use cookies to store access. Takes you to a screen to add a new post, give it a title, and I can it. Encryptedvalues payload they own in their.private database bottom of the modifiers for your List: this code adds shared... Allows you to a specific user swift, Android, Kotlin,,! Has methods for binding directly to specific call sites in my application, I can send it to my as... It to my friends as an iMessage or email large binary objects iCloud users run into any by... Use of two CloudKit databases, the.private and the.shared database by the presence of a single with! Be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred &. Presumably ) philosophical work of non professional philosophers and version fields class NSPersistentCloudKitContainerEventRequest a request to fetch,. By filing bugs with Feedback Assistant matching the objectID in this set briefly discuss how NSPersistentCloudKitContainer objects. Is available in most browsers, and version fields CloudKit is explicitly designed to this! And private databases are meant to store and/or access information on a particular of... That allows you to implement collaborative features of your shared zone in iCloud also has to understand, the. The operation approach can be thought of like a bookmark telling you where you before! To encourage collaboration between people using your app and extension, Core data ensure that have.

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