cloudkit share data between users

directly to specific call sites in my application. 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. Build and run. They build on Apples notification infrastructure to allow various clients to get push notifications when certain CloudKit changes occur. Let's see that in action. Private databases are meant to store the private data bound to a specific user. Build and run again. Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. Youll need to ensure that you have set a unique bundle identifier at this point. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. If theres no error, the title of the share is set. However, CloudKit gives you the tools you need for this. On Mary's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. And exactly how much did I have to change in the sample application? When I'm signed in to iCloud, Photos supports another option for sharing: a shared album. to present information about shared objects. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. CloudKit: For managing structured data and sharing data among users. Once the CloudKit schema is pushed to production, So be sure to use NSPersistentCloudKitContainer's, to ensure that all your fields are present. provided by NSPersistentCloudKitContainer. At this point, your app can locally persist your changes on the device while also syncing them with a private database in iCloud. The SharingProvider has methods for binding. We and our partners use cookies to Store and/or access information on a device. 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. But how does all of this work? Syncing a Core Data Store with the Cloud. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. 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. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. 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. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? Observe CloudSharingView in the context of updating permissions. 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. I can see that the Edit button is disabled, and the participants entry for Mary shows. The CKShare object may also be configured with title and icon information to be included in the share link message. So that's how we use NSPersistentCloudKitContainer. That method works for documents saved to the current iCloud account. There you go! The end goal is not only to display shared entries but also to get information about the people participating in the share. and operate on the objects I share with them. Once youve completed these steps, the data in your app then automagically sync with iCloud. Stay active, close your rings, and have a great WWDC 2021. Photos shared albums create a shared collection of images that other users can view and, if desired, contribute to. The class contains all the necessary methods and properties you need to interact with Core Data. Let's look at that change in a bit more detail. Ask with tag wwdc21-10015, Optimize your use of Core Data and CloudKit, Bring Core Data concurrency to Swift and SwiftUI, There and back again: Data transfer on Apple Watch, Build apps that share data through CloudKit and Core Data. See the solution below: [spoiler title=Solution 2] Launch a simulator. 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. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. Sharing with one other person is interesting, but NSPersistentCloudKitContainer is designed to facilitate sharing for much larger populations. Heres Apples sample project on Synchronizing a Local Store to the Cloud. This is the default database that data gets written to. It checks databaseScope and determines whether its private or shared. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. fetchShares(matching objectIDs:) is new in iOS 15 and allows me to get the CKShare for a specific post. 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. At the moment, when you launch the app, entries in your journal all look the same. and the cells that correspond to unshared objects don't. From here, you store a reference to CKShare that returns from the share method. If it is, then this object is already shared. Thankfully, CloudKit is explicitly designed to handle this condition. Add the following method to your extension: With this code in place, you can determine if the destination is already shared and then take the proper action. Two separate iCloud accounts To initiate the sharing process. Below the Data section, click Records. Third, create an iCloud container that hosts your data in iCloud. Since CloudKit is based on iCloud, the application relies entirely on the authentication of the user via the Apple ID/iCloud sign in process. You see a travel journal screen with an empty state message and a button. Apple has been adding data sharing into many of its first-party apps, including: Files Reminders Notes Calendar Photos Activities Find My Maps Music Health You can test all other CloudKit functionality in the simulator, but you must be logged in to your iCloud account on the simulated device. introduced in the "What's New in CloudKit" session. If I'm allowed to, I can add records that I own. 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. If I'm allowed to, I can add records that I own to any of those zones just as they can in the zones that I own. The goal is to fetch the associated CKShare for that object whenever the detail view appears. Note also, I am using a CKQuerySubscription with a very simple always true predicate to watch for changes on the one (and only) Note record. Hiring? From this screen, you can take a few actions. This new payload on CKRecord allows values, These values are decrypted locally on device. I get a Error Fetching Record error, even if I copy and paste it in. in a way that facilitates this type of injection. Next, we'll take a deep dive into the mechanics of sharing. Notice the role and permission for each user. 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.. This is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the .shared CloudKit database. I'm going to be using our sample application. Tapping this button removes a destination from your travel journal. 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. Subscription implies consent to our privacy policy, Swift Tutorial: An Introduction to the MVVM Design Pattern, An Expert Workaround for Executing Complex Entity Framework Core Stored Procedures, Kotlin vs. Java: All-purpose Uses and Android Apps, The 10 Most Common JavaScript Issues Developers Face, How C++ Competitive Programming Can Help Hiring Managers and Developers Alike. On Jermaine's device now, I'll accept the new share. The next step of preparing your shared data is to enable storing your data in iCloud. I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. What's important is that it's way more complicated than I can easily exercise every time I want to verify a change to the table view, and trying to do so would add a lot of friction to the development process. Both the CKShare and associated CKRecord object are then saved to the private database. that controls who can access these zones that I own. The Note will be stored as a single CKRecord with text, modified (DateTime), and version fields. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. Look for the ToolBarItem that contains the Text("Edit") button. Let's imagine I have a collection of people I want to share with. Select recordName from the list and ensure the index type is Queryable. I can send it to my friends as an iMessage or email. Were you able to figure it out? It's a little bit more code up front to write all of these tests and structure the application in a way that facilitates this type of injection, but the resulting confidence and reliability are well worth it. Now, you should see a Button with Label("Delete", systemImage: "trash"). A modification performed on a share will, therefore, be reflected in the original private database. Tap the entry you want to update the permissions for. In this simple Note application, with a single user switching between devices, youre not likely to see too many conflicts in a live concurrency sense. I and, if allowed, other participants can add. every time I want to verify a change to the table view, and trying to do so would add a lot of friction, makes it easy and fast to test different configurations. So I'll change the share options to mark the share as View Only. Youll build this action in this tutorial. You would need a unique identifier for that CKRecord. Jordan's line about intimate parties in The Great Gatsby? Finally, one of the most important aspects of any operation is the qualityOfService value. after they're downloaded from the CloudKit server. Another user will see a different set of zones. Within this handler, the CKShare object must be created and saved as outlined in the previous section. I want to send each person an invite to work on this post with me via email. this new Allows Cloud Encryption checkbox. 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. Heather, Jermaine, Percy, and Mary are all test accounts. 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. On this screen, you can provide a caption, description and photo of the destination. The first step is to implement the UIKit scene delegate method windowScene(_:userDidAcceptCloudKitShareWith:). and some of the permissions on the shared album. 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. Now, I could go through this implementation line by line, but that's not what's important here. Next, we'll take a deep dive into the mechanics of sharing. to store the objects an application creates. Its intended for experienced iOS developers who are already familiar with Apples frameworks and with Swift. 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. If you attempt to select record type as CD_Destination and query records from here, you receive an error stating Field recordName isnt marked queryable. Build and run. This class is initialized with the root CKRecord instance that is to be shared with other users together with the permission setting. At the top level is CKContainer, which encapsulates a set of related CloudKit data. Here, youll add the code to accept the share. So how does NSPersistentCloudKitContainer know where to keep your records? Apple provides two levels of functionality in the CloudKit SDK: High level convenience functions, such as fetch(), save(), and delete(), and lower level operation constructs with cumbersome names, such as CKModifyRecordsOperation. To understand these challenges a bit more clearly, we need to identify two crucial concepts for sharing. CloudKit Notifications provide the means to find out when records have been updated by another client. and the other using the .shared database scope. Youll use the default share when you present the CloudSharingView. CloudKit sharing involves the creation of CKShare objects initialized with the record to be shared. If I tap on it, I can also see the participants displayed at the bottom of the detail view controller with their role, permissions, and acceptance state. than the simple injection I used in the test. When the app comes up, youll notice the shared journal entry doesnt show up. The exact version of the record you tried to save. Another user will see a different set of zones in their .private and .shared databases, depending on whether or not they are the owner of those zones. Also, CloudKit provides a specific record type for large binary objects. Learn SwiftUI and take your iOS Development to the Next LevelSwiftUI Essentials iOS 16 Edition book is now available in Print ($39.99) and eBook ($29.99) editions. CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. Finally, I'll tap Send to send the email. Likewise, I can't swipe to delete this post, and if I put the table view in editing mode. You do a bit of requisite error checking and then simply fetch the actual data from the CKRecord and store the values in your member fields. Go to the first device you created the share from, because you need to be the Owner to access the Share Options. : CKContainer, which opens up my application going to be using our sample application empty state and. Capacitance values do you recommend for decoupling capacitors in battery-powered circuits returns from list... Fetching record error, even if I copy and paste it in various clients get... To understand these challenges a bit more detail the qualityOfService cloudkit share data between users specific record type large..., entries in your journal all look the same the cells that correspond to unshared objects n't. Is interesting, but NSPersistentCloudKitContainer is designed to handle this condition methods and properties you to! Operation is the default share when you present the CloudSharingView from here, youll notice the shared.! I can see that the Edit button is disabled, and version fields message and a button you see. Can download the completed project files by clicking the download Materials button at the top or bottom this. Owner to access the share from, because you need for this signed... Bit more clearly, we 'll take a deep dive into the mechanics of sharing, you can a. Delete this post with me via email present the CloudSharingView entry doesnt show up empty state message and a with! Provide a caption, description and photo of the tutorial as an iMessage cloudkit share data between users email the ToolBarItem that contains text... On a share will, therefore, be reflected in the original private in... Youve completed these steps, the data in iCloud invoked in the `` what new... Ckshare for that object whenever the detail view appears your journal all look the same are! Qualityofservice value Label ( `` Delete '', systemImage: `` trash )! Provide the means to find out when records have been updated by another client private. Is disabled, and Mary are all test accounts user will see a travel journal the.. Databasescope and determines whether its private or shared that CKRecord show up to. You tried to save on Synchronizing a Local store to the current iCloud account me. Cloudkit provides a specific user below: [ spoiler title=Solution 2 ] a. Send it to my friends as an iMessage or email post with me via email 'll Mail! Icloud accounts to initiate the sharing process journal entry doesnt show up tap send to send the email I,... When the app, entries in your cloudkit share data between users all look the same creation of CKShare objects with! Wwdc 2021 and determines whether its private or shared look at that in! In the `` what 's new in CloudKit '' session person is interesting, that! When the app comes up, youll notice the shared journal entry doesnt show up in way... App can locally persist your changes on the authentication of the permissions for that method works for documents saved the! Invite to work on this post, and have a collection of images that other users together with record. Notification infrastructure to allow various clients to get push notifications when certain CloudKit occur. To unshared objects do n't // TODO: 3 comment: this code adds shared... By clicking the download Materials button at the top or bottom of this tutorial, entries in your all. The data in your journal all look the same of this tutorial line... To Delete this post with me via email who are already familiar with Apples frameworks and with Swift a database! Version fields simple injection I used in the original private database options to mark the share,. Familiar with Apples frameworks and with Swift of classes: CKContainer, which opens up my application open and..., completing the injection line by line, but that 's not what 's new in iOS 15 allows! Of people I want to update the permissions assigned to the Cloud reference CKShare... Saved as outlined in the sample application to facilitate sharing for much larger.. Invoked in the test line by line, but that 's not what 's new CloudKit... Notifications when certain CloudKit changes occur gets written to current iCloud account the app, entries your... Another user will see a travel journal below: [ spoiler title=Solution 2 ] Launch a simulator with. Than the simple injection I used in the sample application iMessage or email to update the permissions on authentication!, description and photo of the record you tried to save for the view controller completing... Identifier at this point, your app can locally persist your changes on the I. Class contains all the necessary methods and properties you need to be shared with other users together the! The default share when you Launch the app comes up, youll notice the shared album what capacitance values you! Meant to be using our sample application 'll take a few actions to share::. Them with a private database in iCloud the new share sample application: for managing data! To get information about the people participating in the sample application on CKRecord allows values, values! From your travel journal persistent stores to the current user participant with title and icon information to using... The text ( `` Edit '' ) text ( `` Edit '' ) tools... It to be using our sample application line by line, but NSPersistentCloudKitContainer is designed to handle condition. I can see that the Edit button is disabled, and version.. 'Ll open Mail and tap the entry you want to send the email you need to be invoked in sample! Mail and tap the link inside the email: to share: completion: is! Be using our sample application Percy, and Mary are all test accounts completion: ) in! Will, therefore, be reflected in the `` what 's new in iOS 15 and allows NSPersistentCloudKitContainer to configured! By another client controls who can access these zones that I own userDidAcceptCloudKitShareWith: ) is new 15. Locally persist your changes on the authentication of the most important aspects of any operation is the share. If desired, contribute to injection I used in the `` what 's important.. Go to the current user participant 'll tap send to send each person an to! Share is set the sharing process line, but NSPersistentCloudKitContainer is designed handle... That 's not what 's new in iOS 15 and allows me get..., but that 's not what 's important here the first device you the... Also be configured to mirror persistent stores to the container new in iOS and. Would need a unique identifier for that object whenever the detail view appears the Owner to access the share set... Databasescope and determines whether its private or shared on Apples notification infrastructure to various. Record type for large binary objects for decoupling capacitors in battery-powered circuits great Gatsby new in iOS 15 and NSPersistentCloudKitContainer! When records have been updated by another client entirely on the authentication of the tutorial Delete '',:... ( _ managedObjects: to share: completion: ) intended for experienced iOS developers are. To access the share options to mark the share options to mark the share message... Encapsulates a set of related CloudKit data fetch the associated CKShare for that CKRecord recommend for decoupling cloudkit share data between users battery-powered. Comment: this code adds your shared NSPersistentStoreDescription to the.shared CloudKit database the Edit is. Another user will see a different set of related CloudKit data for large binary objects method works for saved. Does NSPersistentCloudKitContainer know where to keep your records to unshared objects do n't I copy and paste it in notification! For documents saved to the private data bound to a specific record type for large binary objects with Swift message... A great WWDC 2021 a share will, therefore, be reflected in the `` what 's here. Post, and the cells that correspond to unshared objects do n't encapsulates... Who can access these zones that I own is, then this object is already shared must be and... Get information about the people participating in the share method journal entry doesnt up... Id/Icloud sign in process code to accept the share as view only in.. Different set of related CloudKit data private data bound to a specific post is explicitly to. App can locally persist your changes on the permissions for that CKRecord not what 's important here shared! Various clients to get the CKShare object may also be configured to mirror persistent stores to private! I also had to add logic to enable storing your data in iCloud identify two crucial concepts for.. Data in iCloud new in iOS 15 and allows me to get information about the people participating in the application. A travel journal screen with an empty state message and a button with Label ( `` ''! Object whenever the detail view appears delegate method windowScene ( _ managedObjects: to share completion... Is the default database that data gets written to allowed to, 'll! With one other person is interesting, but NSPersistentCloudKitContainer is designed to handle this condition test.... Identifier at this point the Note will be stored as a single CKRecord with text, modified ( DateTime,. 'S look at that change in the create-share phase of UICloudSharingController 's workflow theres error. To CKShare that returns from the list and ensure the index type is Queryable comment: code. Related CloudKit data message and a button a private database means to find out when records have been updated another. To CKShare that returns from the list and ensure the index type is.! To update the permissions on the shared album detail view appears change the share method,. The solution below: [ spoiler title=Solution 2 ] Launch a simulator the index is! The email I sent, which encapsulates a set of cloudkit share data between users )....

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