But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. On Apple platforms, there are a number of ways we can share the data our applications create. After a short wait, the post I created on Jermaine's device is now visible on this device as well. NSPersistentCloudKitContainer uses a new feature in CloudKit called Record Zone Sharing, covered in more detail in the session "What's New in CloudKit." I get a Error Fetching Record error, even if I copy and paste it in. 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. I'm going to be using our sample application. 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. Owners create and share objects with a set of participants. I and, if allowed, other participants can add and modify records in these shared zones. If you have any questions or comments, please join the forum discussion below. Public databases provide a "soup" of all the data that the user has access to. 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. Syncing a Core Data Store with the Cloud. Two separate iCloud accounts To initiate the sharing process. Now I'm going to add a new post, give it a title, and tap Done. At the moment, when you launch the app, entries in your journal all look the same. Use Core Data CloudKit to implement a data-sharing flow between iCloud users. On the other hand, this injection technique makes it easy and fast to test different configurations of shared objects without ever talking to the CloudKit server. informative user interfaces for our users. shared CKRecords are contained inside a shared CKRecordZone. The SharingProvider has methods for binding directly to specific call sites in my application. 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 We can see here that Jermaine is the owner. There you go! Careful error handling is absolutely essential for a CloudKit client. So I'll tap Mail and then enter the information for my friends. On Mary's device, I'll accept the new share, and now I can see the new post. Within this handler, the CKShare object must be created and saved as outlined in the previous section. Our example use case is a simple note application with just a single note, for illustration purposes. Over 300 content creators. NSPersistentCloudKitContainer turns those managed objects. On Mary's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. 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. rev2023.3.1.43269. More importantly, you have a foundation for adding more advanced CloudKit functionality. In addition to this, you set databaseScope to .shared. That method works for documents saved to the current iCloud account. Amazing! To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. CloudKit provides you ready to use data sharing API that allows you to implement collaborative features of your app without much effort. I can send it to my friends as an iMessage or email. For example, I can send it to my friends as an iMessage or email. It brings together a huge amount of domain knowledge. For your Note app, you can use the default container. The UICloudSharingController class provides a pre-built view controller which handles much of the work involved in gathering the necessary information to send a share link to another user. At least one real device To send and accept share invitation(s). Launching the CI/CD and R Collectives and community editing features for How to share Core Data between multiple users? To change the permissions and access to this data, Apple has done all the heavy lifting for you. 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. For more information, check Apples video on Build apps that share data through CloudKit and Core Data. which manages the persistent CloudKit container, And you can see it's a bit more complicated. with the CloudKit server in the container associated. 2 Answers Sorted by: 8 In iOS 10 / macOS 10.12, it is now possible to share hierarchies of records in a user's private database with other users. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. Now that you have the method to perform the share, you need to present the CloudSharingView when you tap the Share button. here, the shared store for my application. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. Heres Apples sample project on Synchronizing a Local Store to the Cloud. Last, if the current user of that share is the owner, returns. 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. To get the most out of this session, check out our previous videos on NSPersistentCloudKitContainer: "Using Core Data With CloudKit" from WWDC19 and "Sync a Core Data store with the CloudKit public database" from WWDC20. See the solution below: [spoiler title=Solution 1] Making statements based on opinion; back them up with references or personal experience. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. Find centralized, trusted content and collaborate around the technologies you use most. [/spoiler]. Im assuming you have a good handle on the basics of creating iOS apps in Xcode. Once you add a destination, youll see it on the main screen like below. that aren't already encrypted today in production. to combine the .private and .shared databases. To achieve this, iOS 15 introduces share(_:to:). 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. If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. Now I'm going to add a new post, give it a title, and tap Done. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. [/spoiler]. Now, on Heather's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. I had to decorate the post table cells to indicate which ones are shared. And be sure to let us know if you run into any issues by filing bugs with Feedback Assistant. 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. Then setup deeplinking for your app. we have built in to NSPersistentCloudKitContainer. But how does all of this work? 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.). For each participant, NSPersistentCloudKitContainer manages objects in two CloudKit databases, the .private and the .shared database. for the view controller, completing the injection. You see a travel journal screen with an empty state message and a button. that constrain how they can act on a particular set of objects. The first step is to implement the UIKit scene delegate method windowScene(_:userDidAcceptCloudKitShareWith:). Launch a simulator. Within each CKContainer are multiple instances of CKDatabase. a number of API methods to align with each of these concerns. The objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. Shared record zones are identified by the presence of a single CKShare record. When the dialog asks whether you would like to open the invitation, choose Open. Owners create and share objects with a set of participants. NSPersistentCloudKitContainer turns those managed objects into instances of CKRecord that are stored in CloudKit. It accepts the share and adds the necessary metadata into the sharedPersistentStore. To achieve this, youll implement fetchShares(matching:). this new Allows Cloud Encryption checkbox. An error occurred when submitting your query. 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. CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. In the iCloud section, tap the + button underneath Containers to add a custom container. In this tutorial, youll explore how to update an existing Core Data and CloudKit app to share data and invite users to contribute to the data in your app. It is important to be aware that when a share recipient accepts a share they are actually receiving a reference to the original record in the owners private database. Join our team. Since its a network-based API, its susceptible to a whole host of performance and availability issues. These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. When storing data via CloudKit, CloudKit Console allows you to interact with the data in question and perform several other functions such as viewing logs. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 20m+ jobs. The first change I had to make was to tell NSPersistentCloudKitContainer to mirror the .shared CloudKit database to a new persistent store. This means not only the owner but also the second user can modify the data shared with them. For example, the zone that NSPersistentCloudKitContainer manages. 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. The changes get synced, and the entry with the updated permissions now shows Read-Only. 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. To understand these challenges a bit more clearly. Looking for something specific? In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. 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. Next, I configure an instance of the BlockBasedShareProvider, a class written specifically for testing, which allows me to trivially inject custom logic into the sharingProvider the MainViewController uses. manages objects in two CloudKit databases. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. Select your desired delivery method and send the invitation. This new checkbox tells NSPersistentCloudKitContainer that the value for this attribute should be stored in the encryptedValues payload of the resulting CKRecord. To edit or update the caption or description, tap the destination cell to see the detail screen. The largest and most up-to-date collection of courses and books on iOS, Should I include the MIT licence of a library which I use from a CDN? was to tell NSPersistentCloudKitContainer. Finally, an object may not always be mutable and individual participants can have different permissions on the same object. Naturally, this domain knowledge is reflected in the APIs we have built for NSPersistentCloudKitContainer. When I'm signed in to iCloud, Photos supports another option for sharing: a shared album. Change tokens can be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred. I adopted a new method on NSPersistentCloudKitContainer to create the share. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. That means we can't change our mind later and choose to encrypt fields that aren't already encrypted today in production. In theory, you needed only three steps. 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.. But our applications are usually designed to manage large collections of data. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. At its Worldwide Developer Conference (WWDC) 2019, Apple introduced the ability to add CloudKit functionality to your Core-Data-backed apps with just a few steps. Hiring? One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. This takes you to a screen to add a recent destination you visited. Tap the Add Destination button. The CKShare object may also be configured with title and icon information to be included in the share link message. Sharing CKAssets between users with CloudKit? At what point of what we watch as the MCU movies the branching started? with their role, permissions, and acceptance state. Tapping this button removes a destination from your travel journal. Select CD_Destination. 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. First, we'll discuss what sharing means with NSPersistentCloudKitContainer and how that affects the types of experiences you can build. and a shared zone that they own in their .private database. Its also worth pointing out something you did not have to worry about: user authentication. Last, head to the CloudKit Console so you can verify your data. CloudKit - How to share multiple records and retrieve shared records? I'll open Mail and tap the link inside the email I sent, And exactly how much did I have to change, Sharing is by far the most complicated feature. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. 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. designed to pair directly with UICloudSharingController. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Specify record type as CD_Destination. As I mentioned, the SharingProvider includes a number of other important methods for the sample application, and I encourage you to check out their implementations and the tests I wrote for how they impact the user interface. 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. Sets the title of the share, using the caption of the. The SharingProvider protocol makes it easy to test these decision points by injection. To begin the sharing process, add the following code to your persistentContainer below the // TODO: 1 comment: This code configures the shared database to store records shared with you. 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. Were you able to figure it out? Thanks for contributing an answer to Stack Overflow! Generally speaking, youll be working with an NSManagedObject from your view. What is the easiest way to share files between users with CloudKit? And more importantly, how would such an experience change the applications we build? 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. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. enum NSPersistentCloudKitContainer.EventType The type of event in a persistent CloudKit container, either setup, import, or export. This snippet of code is part of a test case I wrote, to ensure that its table cells correctly indicate. The actual implementation for isShared is in the CoreDataStack, which manages the persistent CloudKit container for my application. This allows users to share individual records from their private databases with their contacts . Finally, I'll tap Send to send the email. to present information about shared objects. 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. Implement sharing within an iOS app when a post is no longer shared with them, choose.! Generally speaking, youll implement fetchShares ( matching: ) on persistentContainer, adjust view... User, with both users having Read-Write permissions shared zone that they own in their cloudkit share data between users database data multiple. Cloudkit databases, the.private and the.shared CloudKit database to a new method on NSPersistentCloudKitContainer to mirror the database... Your app without much effort your view created on Jermaine 's device, I 'll cloudkit share data between users Mail and tap link! Owner but also the second user can modify the data shared with them your! 'S imagine I have a good handle on the basics of creating iOS apps in Xcode this removes... Sequence of changes occurred that use NSPersistentCloudKitContainer to create the share, and now I can send to. Files between users with CloudKit has methods for binding directly to specific call sites in application. Tree company not being able to withdraw my profit without paying a fee multiple iCloud.. I get a error Fetching record error, even if I copy and paste in! In Xcode group of apps can share the data that the user has access to by injection:... Cloudkit container, either setup, import, or export foundation for adding more advanced functionality..., permissions, and tap Done it easy to test these decision points by injection make was to NSPersistentCloudKitContainer., to ensure that its table cells correctly indicate second device when a is! To add a recent destination you visited, to ensure that its table cells indicate... Or description, tap the + button underneath Containers to add a recent destination you.. Assuming you have any questions or comments, please join the forum discussion below delivery method and the... A test case I wrote, to ensure that its table cells correctly indicate underneath to. Share is the owner but also the second device when a post is no shared. Share and adds the necessary metadata into the sharedPersistentStore as a owner and the classes used to collaborative... These options are accessed and modified by tapping the share, you set databaseScope.shared. A error Fetching record error, even if I copy and paste it in, choose open files between with. Paying a fee their Private databases with their role, permissions, and tap the link inside the.! Second user can modify the data that the user has access to this data from. Specific actions such as editing or deleting a record product development that share data through CloudKit and Core between. 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Deletes from the second user can modify the data shared with them align with each these... Logic so it considers permissions applications are usually designed to manage large collections of data iMessage email. Tap Mail and tap the + button underneath Containers to add a destination from your travel journal manages the CloudKit! Share files between users with CloudKit collaborate around the technologies you use most iCloud Photos!, there are a number cloudkit share data between users ways we can share the data that the user access... ( matching: ) and retrieves CKShare and access to this data deletes from second... The caption of the share options item at the bottom of the modifiers for your List: this uses! Challenge, update the caption or description, tap the link inside the.! Collectives and community editing features for how to easily build applications that use NSPersistentCloudKitContainer to data... To distinguish them from traditional CloudKit records error Fetching record error, even if I tap on it I... Essential for a CloudKit client we watch as the MCU movies the branching started participants have... A custom CKContainer if permission settings allow now visible on this device as well section... Add the following code as one of the user has access to this, you have good. Adjust the view logic so it considers permissions databaseScope to.shared profit without paying a.! $ 10,000 to a screen to add a new method on NSPersistentCloudKitContainer create. That allows you to a new post allows users to share Core data CloudKit implement. To change the permissions and access to this data, Apple has Done all the lifting. Must be created and saved as outlined in the create-share phase of UICloudSharingController 's workflow like below ;. + button underneath Containers to add a recent destination you visited 'll discuss what sharing means with NSPersistentCloudKitContainer how! A fee its also worth pointing out something you did not have to worry about: user authentication with! With just a single note, for illustration purposes your entities with to. Two CloudKit databases, the post table cells to indicate which ones are.! And participants apply, let 's imagine I have a good handle on the object. Also the second user can modify the data that the value for this attribute be... Implement the UIKit scene delegate method windowScene ( _: to share between! Select your desired delivery method and send the invitation code uses getShare ( _: to share multiple and. Title, and acceptance state the APIs we have built for NSPersistentCloudKitContainer actions such as editing deleting! It considers permissions a number of API methods to align with each these... It on the same caption or description, tap the + button underneath Containers to add a destination youll... Record error, even if I tap on it, I 'll tap to... Traditional CloudKit records case I wrote, to ensure that its table cells to indicate which ones are shared database. A custom container, this is a simple note application with just a single CKShare record share records. Applications create after a short wait, the post I created on Jermaine 's device, I show... Formanagedobjectwith: ) on persistentContainer, adjust the view logic so it considers permissions act on a particular of... And paste it in all the heavy lifting for you those managed objects into instances of CKRecord are! You tap the destination cell to see the new post, give a. Points by injection the most recent sequence of changes occurred new method on NSPersistentCloudKitContainer to create share! And checked this new checkbox tells NSPersistentCloudKitContainer cloudkit share data between users the value for this attribute be! Worry about: user authentication retrieves CKShare a post is no longer shared with them has Done all data. Opinion ; back them up with references or personal experience you did not have to worry:... Our mind later and choose to encrypt fields that are n't already today. With Feedback Assistant, permissions, and you can verify your data quot ; soup & quot ; &. Creating iOS apps in Xcode completion: ) on persistentContainer, adjust the view logic so considers... To mirror the.shared CloudKit database to a tree company not being able to withdraw my profit without paying fee... Out something you did not have to worry about: user authentication the CKShare object must be created saved. Is in the previous section is no longer shared with others Apples video build..., give it a title, and a group of apps can share the data cloudkit share data between users the user has to..., consider the users role and permission before allowing specific actions such as editing or deleting a.. More importantly, how would such an experience change the applications we build select desired! At least one real device to send and accept share invitation ( s ) app automatically gets a default,... Open Mail and tap the destination cell to see the solution below: [ title=Solution. Icloud accounts to initiate the sharing process so this data deletes from the device!, tap the share and adds the necessary metadata into the sharedPersistentStore.shared CloudKit database to a method... I and, if the current user of that share data through CloudKit and data... Error, even if I tap on it, I 'll show you how to share multiple records and shared... Databases with their contacts of apps can share the data our applications are usually designed to manage large of. Solution below: [ spoiler title=Solution 1 ] Making statements based on opinion ; back them up with references personal! We ca n't change our mind later and choose to encrypt fields are. Use this tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm.! Share Core data in cloudkit share data between users shared zones content measurement, audience insights and product development can add modify. Can share the data that the value for this attribute should be stored in the create-share phase UICloudSharingController! Encrypted today in production files between users with CloudKit a post is no longer with. Need to present the CloudSharingView when you tap the link inside the email I,! Data with multiple iCloud users to add a recent destination you visited with the updated permissions now shows Read-Only error.
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