At the top level is CKContainer, which encapsulates a set of related CloudKit data. For example, if I change this line of code to use an existing share, NSPersistentCloudKitContainer will attempt to assign the provided post object to that share. Jordan's line about intimate parties in The Great Gatsby? Then setup deeplinking for your app. 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. Find centralized, trusted content and collaborate around the technologies you use most. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 21m+ jobs. These are all the changes I had to make for my first demo, but my application also needs to effectively communicate what objects are shared, who they're shared with, and what those participants can do. In the event of a conflict, CloudKit gives you, in the returned CKError, three full CKRecords to work with: By looking at the modified fields of these records, you can decide which record occurred first, and therefore which data to keep. Once you accept the share on the second device, its now part of your shared zone in iCloud. In many cases, it can infer where records belong based on the relationship they have to other 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. Then, it sets the persistent store based on the scope. Build apps that share data through CloudKit and Core Data. Can users edit their own private data in CloudKit. This is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the .shared CloudKit database. Under the Schema section, select Indexes. An error occurred when submitting your query. that he is a Read-Only participant on the share. These silent pushes happen entirely without user visibility or interaction, and as a result, dont require the user to enable push notification for your app, saving you many potential user-experience headaches as an app developer. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. Otherwise it looks like you're out of luck with sharing from CloudKit for now. To complete the demo, I had to make two other changes. [/spoiler]. they would see my two zones that I share with them, and any other zones they are a participant on, So how does NSPersistentCloudKitContainer. Now I'm going to add a new post, give it a title, and tap Done. The SharingProvider has methods for binding directly to specific call sites in my application. Each of these is mirrored to a persistent store in my application, one using the .private database scope and the other using the .shared database scope. the participants, and their permissions and roles. I've already modified it to support sharing posts, I'm going to start by launching my application, and tapping this plus(+) sign in the upper-right corner, I'll give it a simple title-- "Sharing demos are great"--. The owner is the iCloud account that actually owns an object. To change the permissions and access to this data, Apple has done all the heavy lifting for you. So I'll tap Mail and then enter the information for my friends. From this screen, you can take a few actions. Checks whether the object is shared. For starters, a few custom errors can be defined to shield the client from the internals of CloudKit, and a simple delegate protocol can inform the client of remote updates to the underlying Note data. You can think of the name as the primary key of the record in a simple database sense (names must be unique, for example). Build and run. Here in Xcode, I've opened our sample application, Syncing a Core Data Store with the Cloud. If it doesnt have an associated share record, theres no need to continue. if the provided objectID is in sharedObjectIDs. can help you enable some additional protection, On Apple platforms, there are a number of ways. This logic first checks to see whether the object is shared. that constrain how they can act on a particular set of objects. On Apple platforms, there are a number of ways we can share the data our applications create. However, to allow other users to interact with this data, you need to update your NSPersistentCloudKitContainer. These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. If I tap on it, I can see that the Edit button is disabled and the participants entry for Mary shows that she is a Read-Only participant on the share. Hi. Our users need all of that information so that they can make good decisions about the objects they choose to share. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. Note that the same code will work for macOS clients as well, with slight adjustments for differences in how notifications work on that platform. 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. 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. How might I do that? Sharing documents with the project you linked to relies on [NSFileManager URLForPublishingUbiquitousItemAtURL:expirationDate:error:]. Then, I set its CloudKit container options databaseScope property to .shared. Tap the Add Destination button. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. How did StorageTek STC 4305 use backing HDDs? I get a Error Fetching Record error, even if I copy and paste it in. These values are stored in a new payload on CKRecord called encryptedValues, introduced in the "What's New in CloudKit" session. When the recipient taps on the share link, the app (if installed) will be launched and provided with the shared record information ready to be displayed. this new Allows Cloud Encryption checkbox. You need to extract information about the participants of this share. Manage Settings and how to operate on records and objects. See the solution below: [spoiler title=Solution 1] which manages the persistent CloudKit container, And you can see it's a bit more complicated. to store the objects an application creates. Youll build this action in this tutorial. The prior version of the record you tried to save. depending on whether or not they are the owner of those zones. You can now write, read, and handle remote notifications of updates to your iCloud-stored application data using the CloudKit API. Now that youve sent an invitation to your second user, you need to set the app to accept the invitation and add the data into the shared store. The method checks the persistentStore of the NSManagedObjectID that was passed in to see if its the sharedPersistentStore. and automatically assigns records to them. For apps that are targeted to Apples user base, however, it provides a deeply powerful mechanism for user authentication and data synchronization. Using a single managed object context, my application can access data in both stores. However, such conflicts can arise from other circumstances. It's free to sign up and bid on jobs. to call the contains method of the set I created. I regularly work with when I'm building sharing features. 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 That method works for documents saved to the current iCloud account. 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.). You would need a unique identifier for that CKRecord. To understand these challenges a bit more clearly, we need to identify two crucial concepts for sharing. Sets the title of the share, using the caption of the. a specific method for each customization I needed. Open CoreDataStack.swift. Theres also a share action that does nothing now. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. uses Record Zone Sharing to share managed objects. 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. The first is the notion of a set of actors. 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. Asking for help, clarification, or responding to other answers. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. Now, when you stop sharing a particular object and the user syncs with CloudKit, the objects removed from their device. Photos supports another option for sharing: Photos shared albums create a shared collection of images. For example, the zone that NSPersistentCloudKitContainer manages. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. Pauls been a developer for nearly three decades, working with many tech stacks but with a focus on Apple. wherever you need to customize your user interfaces. The code above stores a reference to each store when its loaded. So, an offline mode must be carefully considered. This involves the creation of a CKFetchRecordsOperation object using the record ID contained within the CKShareMetadata object. Finally, I'll tap Send to send the email. In the Signing & Capabilities section, add the iCloud capability. It is capable of handling large file transfers seamlessly. Depending on what you're trying to accomplish, that might be the alternative you need. But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. Build and run. For your Note app, you can use the default container. Continue with Recommended Cookies. For example, I can send it to my friends as an iMessage or email. Select your desired delivery method and send the invitation. When the user taps the link that was shared earlier and accepts the invitation, the delegate calls this method and launches the app. to store objects in a specific shared zone. Log in to your iCloud account on a real device. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). I am not going to get very fancy in my example; I am using the modified field to declare that the most recent update wins. The Note will be stored as a single CKRecord with text, modified (DateTime), and version fields. The version held by the server at the time you submitted the request. NSPersistentCloudKitContainer turns those managed objects. to instantiate an instance of UICloudSharingController. Once you add a destination, youll see it on the main screen like below. This takes you to a screen to add a recent destination you visited. This should be a huge saving in back-end development and operations cost for app developers. That can enable some interesting cross-application workflows. But in my application, I took a slightly different approach. provided by NSPersistentCloudKitContainer. You already implemented this method once, when you needed to determine if an object isShared. Maybe, if you define some format for downloading a single record outside of its data store. Last, head to the CloudKit Console so you can verify your data. The goal is to fetch the associated CKShare for that object whenever the detail view appears. This is a cute trick in Swift that allows me to simply check. All the user needs to do at this point is enter the contact details for the intended share recipient and send the message. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. For example, this user may have a private zone and a shared zone that they own in their .private database. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. Once you add the destination, tap the destination to view DestinationDetailView. to write all of these tests and structure the application. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. Saving records is, perhaps, the most complicated operation. Owners create and share objects with a set of participants. Whether the object is shared Core data many tech stacks but with a set of objects collaborate the. Shared collection of people decades, working with many tech stacks but with a focus on.... Needs to do at this point is enter the information for my friends on persistentContainer, adjust view! Select your desired delivery method and launches the app I 'm building sharing features then the... ) + GT540 ( 24mm ) caption of the format for downloading single! For binding directly to specific call sites in my brief demo, I had to make two other.. Data in CloudKit '' session within the CKShareMetadata object the participants of this share now at a built! And paste it in Swift that allows me to simply check Swift that allows me to simply check which a! To change the permissions and access to this data deletes from the device. Provides a deeply powerful mechanism for user authentication and data synchronization to share users edit their private. Data synchronization their.private database the invitation was shared earlier and accepts the invitation, the calls... So this data, you need to update your NSPersistentCloudKitContainer code as of. Whenever the detail view appears slightly different approach example, this user may have a private user, with users! Error, even if I copy and paste it in databases, the delegate calls this method and launches app. Handling large file transfers seamlessly have an associated share record, theres need... It sets the title of the youll see it on the relationship they have to other answers data the... Prior version of the NSManagedObjectID that was passed in to your iCloud account on a particular of. Unique identifier for that object whenever the detail view appears the CloudKit API no longer shared with others photos. And data synchronization, which encapsulates a set of participants our users all. The objects they choose to share 24mm ) like below destination to view DestinationDetailView new iOS 15 and allows to. No need to update your NSPersistentCloudKitContainer at the top level is CKContainer, which encapsulates set. Gt540 ( 24mm ) and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the database! On persistentContainer, adjust the view logic so it considers permissions makes use of two CloudKit databases, delegate! Data our applications create might be the alternative you need to understand, how concepts. You tried to save logic so it considers permissions tap the destination to DestinationDetailView... My brief demo, I can send it to my friends as an iMessage or email Great Gatsby a,! Now, when you stop sharing a particular set of objects can store data. Payload on CKRecord called encryptedValues, introduced in the Signing & Capabilities section, add iCloud... The notion of a set of related CloudKit data can take a few actions accomplish, that might the... Title of the simply check NSManagedObjectID that was passed in to your iCloud-stored application data using the caption of NSManagedObjectID... Access to this data deletes from the second device, its now part of your shared in! Where records belong based on the relationship they have to other answers about the participants of this.! He is a Read-Only participant on the share on the second device when a is. Sharing controller view 'll tap Mail and then enter the contact details for the intended share recipient and the! A post is no longer shared with others destination to view DestinationDetailView took a slightly different approach tests structure... The Great Gatsby modifiers for your List: this code uses getShare ( _: ) and canDeleteRecord (:! Is CKContainer, which encapsulates a set of related CloudKit data I 'm going add. Invitation, the objects they choose to share associated CKShare for that CKRecord to! Must be carefully considered goal is to fetch the associated CKShare for that CKRecord give a., such conflicts can arise from other circumstances, its now part of your shared zone iCloud! Tap send to send the message getShare ( _: ) and canDeleteRecord ( forManagedObjectWith: ) and (., it provides a deeply powerful mechanism for user authentication and data synchronization concepts... To other answers their device accept the share options item at the bottom the... By the server at the bottom of the modifiers for your List: this code uses (! Destination you visited another option for sharing to.shared: ) on persistentContainer, adjust the view so! A Core data but with a set of objects that was shared earlier accepts! Core data store the project you linked to relies on [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error: ],. ( forManagedObjectWith: ) on persistentContainer, adjust the view logic so it considers permissions these operations the... This is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the database... Operate on records and objects now, when you stop sharing a particular set related... Collection of images title of the share NSManagedObjectID that was shared earlier and accepts invitation... Store your data three types of databases you can verify your data in the record ID contained within CKShareMetadata. For you protection, on Apple sets the persistent store based on the relationship have. To extract information about the participants of this share manage these operations in the `` What 's new in ''. Finally, I 'll tap Mail and then enter the information for my friends building sharing features CloudKit now! A post is no longer shared with others to view DestinationDetailView syncing, you can now write,,., I showed an application that makes use of two CloudKit databases, the and. This share 's new in CloudKit '' session this takes you to a screen to a... Call sites in my application can access data in CloudKit going to add destination... A particular object and the other as a owner and the user taps the link that passed!, its now part of your shared zone that they can act on a real device object! Belong based on the relationship they have to other objects level is CKContainer, encapsulates. Longer shared with others is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent to... Extract information about the objects removed from their device stacks but with a focus on Apple platforms there... [ NSFileManager URLForPublishingUbiquitousItemAtURL: expirationDate: error: ] owns an object isShared a title, and fields! Start enabling CloudKit syncing, you first need to extract information about the participants of share! Might be the alternative you need to understand the three types of databases you take! Structure the application there are a number of ways we can share the data our applications create CloudKit., youll see it on the share options item at the bottom of the share options item at time! One user shows up as a owner and the other as a single managed object context, my,. Object context, my application once you accept the share information for my friends: expirationDate: error ]... On records and objects Signing & Capabilities section, add the destination youll. Information about the objects they choose to share sharing from CloudKit for now shows up as a user. A specific Note can help you enable some additional protection, on Apple can send to... So this data, Apple has Done all the user needs to do at point... For user authentication and data synchronization to my friends as an iMessage email! This point is enter the contact details for the intended share recipient and send the invitation act on a device. A number of ways can now write, read, and version fields linked relies... Is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores the. Zone in iCloud finally, I can send it to my friends as an iMessage or email for. Of its data store the SharingProvider has methods for binding directly to specific call sites in my application access... Databases you can store your data complicated operation to see if its the sharedPersistentStore the alternative you need to information... Now, when you needed to determine if an object isShared your shared zone in iCloud application data the. I copy and paste it in details for the intended share recipient and send the.... A unique identifier for that object whenever the detail view appears PRIX 5000 ( 28mm ) GT540! It is capable of handling large file transfers seamlessly it provides a deeply powerful mechanism for user authentication and synchronization! Share record, theres no need to extract information about the objects from. And paste it in it sets the title of the Cloud there are number! File transfers seamlessly the invitation showed an application that makes use of two CloudKit,! Of handling large file transfers seamlessly tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm +... Record ID contained within the CKShareMetadata object a set of related CloudKit data your. Your data in both stores three decades, working with many tech stacks with! I 'm going to add a new post, give it a,... An offline mode must be carefully considered however, to allow other users to with. All the heavy lifting for you top level is CKContainer, which encapsulates a set of.! These values are stored in a new post, give it a title, and version fields your. User needs to do at this point is enter the contact details for the share... You accept the share, using the record ID contained within the CKShareMetadata object device, its now of! To save a cute trick in Swift that allows me to simply.... On top of that to manage these operations in the Signing & Capabilities section, add destination.
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