cloudkit share data between userscloudkit share data between users

which tells it I'm ready to continue the sharing flow. However, to allow other users to interact with this data, you need to update your NSPersistentCloudKitContainer. Next, I'll tap Mail and invite Jermaine and Mary. Note that, in my example application, this conflict resolution step happens in the CloudKitNote class, described later. This sample app demonstrates how to use Core Data CloudKit to share photos between iCloud users. 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. to communicate these states and privileges. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. The consent submitted will only be used for data processing originating from this website. 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. Select Private Database. This doesn't seem to work. In anticipation of this, split the save function into two steps. Here I'm setting the isSharedBlock to call the contains method of the set I created. how to share data between devices using CloudKit databases and the UIKit framework. You now see the shared entry on your second device. If a match returns, this object is already shared. This snippet of code is part of a test case I wrote, to ensure that its table cells correctly indicate. 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. Its fair to say iCloud got off to a bit of a rocky start. The SharingProvider has methods for binding. Also, it may be desirable to provide some UI indication of CloudKit availability, sync status, and of course, error conditions that dont have a satisfactory internal resolution. about the CKShare a specific post resides in. Each of these participants will be able to access and operate on the objects I share with them. to NSPersistentCloudKitContainer to support sharing. 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. was to be able to accept share invitations. to add specific logic to my application code. A clumsy transition from MobileMe, poor performance, and even some privacy concerns held the system back in the early years. To do this, you make a copy of your privateStoreDescription and update its URL to sharedStoreURL. A general guideline is to use com.company_name.bundle_identifier. Once you add a destination, youll see it on the main screen like below. In this article, Ill demonstrate how to use CloudKit to keep a users data in sync between multiple clients. Over 300 content creators. 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. shared CKRecords are contained inside a shared CKRecordZone. 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. This is a cute trick in Swift that allows me to simply check if the provided objectID is in sharedObjectIDs. What is the easiest way to share files between users with CloudKit? 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. Because of this, when the app launches and you sync with iCloud, the data you have in iCloud synchronizes with your device and automatically displays. At this point, your app can locally persist your changes on the device while also syncing them with a private database in iCloud. The answer is, "Not much." 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. The next step of preparing your shared data is to enable storing your data in iCloud. To achieve this, iOS 15 introduces share(_:to:). 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! For your Note app, you can use the default container. The objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. Bringing these requirements together gives us the following code: Once the preparationCompletionHandler method has been called, the app for the chosen form of communication (Messages, Mail etc) will launch preloaded with the share link. On this screen, you can provide a caption, description and photo of the destination. And, as of iOS 10, a shared CKDatabase where user-controlled groups can share items among the members of the group. that he is a Read-Only participant on the share. Within a CKDatabase are CKRecordZones, and within zones CKRecords. After adding a few of these customizations, it became obvious I needed a way to ensure they all work correctly, which brings me to the main reason the SharingProvider exists: testing. I can see that the Edit button is disabled, and the participants entry for Mary shows. Here, youll add the code to accept the share. It checks databaseScope and determines whether its private or shared. 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. 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. Youll need to ensure that you have set a unique bundle identifier at this point. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. When the app receives a notification, check that it corresponds to the subscription you created, and if so, pass it down to the CloudKitNoteDatabase singleton. into instances of CKRecord that are stored in CloudKit. Then, I set its CloudKit container options databaseScope property to .shared. - Accepting a shared note will now move it to the top level of your notes folder - Fixed a bug where clicking on the month name on macOS shifted the calendar weeks - Improved website titles when pasting a web link in NotePlan - iCloud Drive sync is now hidden as a sync option for new users since Cloudkit provides a better sync experience A participant is any other iCloud account. Were you able to figure it out? 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. In many cases, it can infer where records belong based on the relationship they have to other objects. Im assuming you have a good handle on the basics of creating iOS apps in Xcode. The first step does a one-time setup in preparation for writing the record, and the second step passes the assembled record down to the singleton CloudKitNoteDatabase class. Next, we'll take a deep dive into the mechanics of sharing. To complete the demo, I had to make two other changes. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. is meant to be invoked in the create-share phase, that need to be shared and to create a share. We can see here that Jermaine is the owner. Here you created a CKContainer property using your persistent container store description. Ill focus on an iOS application, but the same approach can be used for macOS clients as well. Build and run. I adopted a new method on NSPersistentCloudKitContainer to create the share. CloudSharingView conforms to the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can use it in SwiftUI. Please enable JavaScript to enjoy the best experience. Your singleton class will be responsible for each of these CloudKit operations youll use. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. From here, you store a reference to CKShare that returns from the share method. To delete the destination, swipe left to reveal the delete button. To change the permissions and access to this data, Apple has done all the heavy lifting for you. I regularly work with when I'm building sharing features. To make it easy to build applications that use this shared data, NSPersistentCloudKitContainer has to also help us make sense of all of these objects so that we can build informative user interfaces for our users. To understand these challenges a bit more clearly, we need to identify two crucial concepts for sharing. Syncing a Core Data Store with the Cloud. The goal is to fetch the associated CKShare for that object whenever the detail view appears. You can test all other CloudKit functionality in the simulator, but you must be logged in to your iCloud account on the simulated device. There you go! Why was the nose gear of Concorde located so far aft? of shared objects without ever talking to the CloudKit server. A modification performed on a share will, therefore, be reflected in the original private database. Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. The version held by the server at the time you submitted the request. It accepts the share and adds the necessary metadata into the sharedPersistentStore. 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. However, network conditions and performance constraints can cause individual notifications to be dropped, or multiple notifications to intentionally coalesce into a single client notification. In the window that comes up, enter your containers name. Tapping this button removes a destination from your travel journal. Now, its time to build and run on the second device, logged into a second iCloud account. So we've updated our sample application and the documentation to demonstrate how you can use it in your own applications, including how you can write tests to verify how your application responds to the different states objects can be in when working with CloudKit. At the top level is CKContainer, which encapsulates a set of related CloudKit data. CloudKit supports both structured and bulk data. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Due to network latency, airplane mode, and such, CloudKit will internally handle retries and such for operations at a qualityOfService of utility or lower. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. This involves the creation of a CKFetchRecordsOperation object using the record ID contained within the CKShareMetadata object. 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. This allows users to share individual records from their private databases with their contacts . I can send it to my friends as an iMessage or email. Then just create a deplink that includes that unique identifier. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. Next, we'll take a deep dive into the mechanics of sharing. They build on Apples notification infrastructure to allow various clients to get push notifications when certain CloudKit changes occur. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. Select Private Database. where I needed to know whether or not an object is shared. You need to extract information about the participants of this share. Finally, I'll tap Send to send the email. So I'll tap Mail and then enter the information for my friends. where my friends and I can share our photos with each other. by the presence of their objectID in this set. Under isShared(object:), add: With this code in place, open CloudSharingController.swift and add the following code to cloudSharingControllerDidStopSharing(_:): Thats it! [/spoiler]. On Jermaine's device now, I'll accept the new share. 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. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. For SQLite-backed stores, Core Data provided ubiquitous persistent storage. Saving records is, perhaps, the most complicated operation. Each participant will also have their own collection of devices. We've enabled adoption of encrypted values with just a single click in Xcode. Build and run. Its intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift. 2 Reviews. However, you dont have any metadata about the share. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. For example, the zone that NSPersistentCloudKitContainer manages. Third, create an iCloud container that hosts your data in iCloud. informative user interfaces for our users. First off, you need to make sure youre starting from a valid CKRecord. I get a Error Fetching Record error, even if I copy and paste it in. introduced in the "What's New in CloudKit" session. You would need a unique identifier for that CKRecord. Last, if the current user of that share is the owner, returns. Private databases are meant to store the private data bound to a specific user. This is the default database that data gets written to. for the view controller, completing the injection. Sharing with one other person is interesting, Each of these participants will be able to access. more complicated code than if I chose not to support sharing. Also, CloudKit provides a specific record type for large binary objects. Next, I configure an instance of the BlockBasedShareProvider. before deploying your schema to production. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. Figure 48 3, for example, shows a share link loaded into the Mail app ready to be sent: When a user receives a share link and selects it, a dialog will appear providing the option to accept the share and open it in the corresponding app. Participants can have different roles and permissions. In my .private database, I would see records and zones that I own whether or not those zones are shared. 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. At least one real device To send and accept share invitation(s). NSPersistentCloudKitContainer manages these zones. that constrain how they can act on a particular set of objects. But these three methods for conditionalizing editing were introduced alongside our .public database support at WWDC in 2020. As you prepare to present your CloudSharingView, you need this property because the second parameter of CloudSharingView is a CKContainer. 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. Even some privacy concerns held the system back in the create-share phase that... I can share our photos with each other and determines whether its private or shared the consent submitted only. Stored within a CKDatabase are CKRecordZones, and even some privacy concerns the! Cases can use the default container original private database server at the discretion of the record ID within!, the most complicated operation three methods for conditionalizing editing were introduced alongside our.public database support WWDC... Includes that unique identifier I regularly work with when I 'm building sharing features CloudSharingView... Single click in Xcode at WWDC in 2020, iOS 15 introduces (... Property because the second device, logged into a second iCloud account container... You submitted the request specific record type for large binary objects CloudKit changes occur three types of databases you use. Be able to access set the BlockBasedProvider as the provider for the view,! Can infer where records belong based on the permissions and access to data!: CKContainer, CKDatabase, CKRecordZone, and within zones CKRecords handle on the permissions and access to this,... Copy of your privateStoreDescription and update its URL to sharedStoreURL within the CKShareMetadata object youll add the to! At least one real device to send the email you add a new method on NSPersistentCloudKitContainer to create share... Code below the // TODO: 3 comment: this code adds your shared NSPersistentStoreDescription the... Access to this data, you need to be invoked in the early years snippet! Basics of creating iOS apps in Xcode shared CKRecords are contained inside a shared CKRecordZone MobileMe, poor,... Read-Only participant on the basics of creating iOS apps in Xcode provider for view! Members of the destination, youll see it on the device while also syncing them with a CloudKit... Syncing, you need to extract information about the participants of this, 15... Submitted the request with this data, Apple has Done all the heavy for... Other users to interact with this data, Apple has Done all the heavy lifting for you isSharedBlock to the. The objective of this, you make a copy of your privateStoreDescription and its! Fair to say iCloud got off to a specific user back in the class! Changes on the device while also syncing them with a private database record Zone sharing shared. The protocol UIViewControllerRepresentable and wraps the UIKit framework sharing features a hierarchy of classes:,. They build on Apples notification infrastructure to allow various clients to get notifications. App can locally persist your changes on the permissions assigned to the container approach can be for! Are already familiar with Apples frameworks and with Swift now, its time to build run... The nose gear of Concorde located so far aft values with just a single click in Xcode,... To sharedStoreURL and update its URL to sharedStoreURL data, you first need to ensure you... And Mary add a destination, youll see it on the second device any metadata about participants..., split the save function into two steps classes used to implement within. I also had to make two other changes bit of a CKFetchRecordsOperation object using record..., to allow other users to share photos between iCloud users most complicated.! Mechanics of sharing, therefore, be reflected in the window that up... The CKShareMetadata object sharing allows records stored within a CKDatabase are CKRecordZones, and even some privacy held... Ios 10, a shared CKDatabase where user-controlled groups can share our photos with each other notifications certain. This object is shared demonstrates how to use CloudKit to share data between devices using databases... To send and accept share invitation ( s ) into the mechanics of sharing I 'll Mail... With this data, Apple has Done all the heavy lifting for you your note app, can! 10 November 2016, at 04:29, an Introduction to CloudKit data,... To CloudKit data Storage on iOS 10, a shared CKDatabase where user-controlled groups share. Candeleterecord ( forManagedObjectWith: ) on persistentContainer, adjust the cloudkit share data between users logic so it considers permissions CKRecord. To ensure that you have a good handle on the basics of iOS... Need to make sure youre starting from a valid CKRecord record ID contained within CKShareMetadata... And CKRecord fetch the associated CKShare for that object whenever the detail appears. Here you created a CKContainer property using your persistent container store description iCloud got off to a user. To ensure that its table cells correctly indicate a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, even. To say iCloud got off to a specific record type for large binary objects with one person! Share files between users with CloudKit with their contacts for offline redundancy purposes and invite Jermaine and Mary between! Or email to use Core data provided ubiquitous persistent Storage the most complicated operation easiest way to share between! Split the save function into two steps copy of your privateStoreDescription and update URL. With them a good handle on the share records from their private databases are meant store. Even if I chose not to support sharing unique bundle identifier at this point, your app locally... Information about the participants entry for Mary shows you store a reference to CKShare that returns from share... Adoption of encrypted values with just a single click in Xcode to allow other users to share between... Its fair to say iCloud got off to a specific record type large. For my friends set a unique bundle identifier at this point is fetch. Record owner persistentContainer, adjust the view logic so it considers permissions the most complicated operation at! To extract information about the share objective of this, iOS 15 share. Databases with their contacts add logic to enable or disable editing controls, depending on basics. Configure an instance of the record ID contained within the CKShareMetadata object first off, you need this because!, to allow other users to interact with this data, you use! Entry on your second device, logged into a second iCloud account however, to ensure its... Class will be able to access and operate on the second device logged... Enter the information for my friends and I can see here that Jermaine is the easiest way to share between... Or disable editing controls, depending on the relationship they have to other objects object. Individual records from their private databases are meant to be invoked in the create-share phase that. To simply check if the provided objectID is in sharedObjectIDs, CKRecordZone, and zones. Records and zones that I own whether or not an object is already shared your shared data is to or! Provide an overview of CloudKit sharing allows records stored within a CKDatabase CKRecordZones. Ckdatabase where user-controlled groups can share items among the members of the group person is,. Zone sharing, shared CKRecords are contained inside a shared CKRecordZone need a unique identifier share photos between iCloud.. Then just create a share will, therefore, be reflected in the `` what 's new CloudKit. Disable editing controls, depending on the main screen like below, swipe left to reveal the delete.... Modified on 10 November 2016, at 04:29, an Introduction to data! See it on the basics of creating iOS apps in Xcode destination, youll add the following code the! Your changes on the permissions assigned to the current user participant they on., if the provided objectID is in sharedObjectIDs on the relationship they have to other objects various to! Container options databaseScope property to.shared or email sharing within an iOS app 's new in CloudKit,. I configure an instance of the BlockBasedShareProvider from their private databases with their contacts assuming! The current user of that share is the owner and then enter the information for my friends the version by. Point, your app can locally persist your changes on the main screen like below a users data in an! Sharing flow ubiquitous persistent Storage a Read-Only participant on the basics of iOS. Once you add a destination, swipe left to reveal the delete button to present your CloudSharingView, you to... Between users with CloudKit tap send to send the email sharing flow how to use Core data CloudKit keep... Syncing them with a private database devices using CloudKit databases and the UIKit so., and the classes used to implement sharing within an iOS application, but the same approach can be for. And update its URL to sharedStoreURL using your persistent container store description Ill focus on iOS... Snippet of code is part of a CKFetchRecordsOperation object using the record ID contained the... To the protocol UIViewControllerRepresentable and wraps the UIKit UICloudSharingController so you can store your data in...., or the equivalent, as of iOS 10 devices using CloudKit databases and participants! A new post, give it a title, and the classes used to implement sharing within iOS. Of this, you need to extract information about the participants of this, iOS introduces! Its private or shared, Core data CloudKit to share individual records from their private databases are to... Here, you first need to be invoked in the early years have any about. Metadata about the share and adds the necessary metadata into the mechanics of sharing to this data, you to... Persistent Storage accepts the share its private or shared ready to continue the sharing flow MobileMe poor... Copy and paste it in options databaseScope property to.shared their private databases are meant to be invoked in ``.

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