cloudkit share data between users

And you can see it's a bit more complicated than the simple injection I used in the test. If you prefer to read the matrix as code, there's a new boolean-- allowsCloudEncryption--, that you can use to configure this property, That means we can't change our mind later. Heres Apples sample project on Synchronizing a Local Store to the Cloud. When a record is shared, a share link is sent to the recipient user in the form of a URL. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. Now I'm going to add a new post, give it a title, and tap Done. 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. 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. When I'm signed in to iCloud, Photos supports another option for sharing: a shared album. Our example use case is a simple note application with just a single note, for illustration purposes. It: Now, open DestinationDetailView.swift. Hi. It checks databaseScope and determines whether its private or shared. But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. 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. A modification performed on a share will, therefore, be reflected in the original private database. 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. First, update your container type to NSPersistentCloudKitContainer. 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.. 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. If I'm allowed to, I can add records that I own. can help you enable some additional protection, On Apple platforms, there are a number of ways. before deploying your schema to production. Within a CKDatabase are CKRecordZones, and within zones CKRecords. Theres no huge harm in setting it, but Apple recommends making an effort to avoid this since it wastes network and server resources. In addition to sending a share link, the app must also be adapted to accept a share and fetch the record for the shared cloud database. and the cells that correspond to unshared objects don't. When the user taps the link that was shared earlier and accepts the invitation, the delegate calls this method and launches the app. I'll give it a simple title-- "Sharing demos are great"-- and tap Done. Here you created a CKContainer property using your persistent container store description. Saving records is, perhaps, the most complicated operation. For this example, youll use CKAsset to store the note text. The way to enable these silent notifications is to set the shouldSendContentAvailable property on the CKNotificationInfo instance, while leaving all of the traditional notification settings (shouldBadge, soundName, and so on) unset. Once youve completed that task, set showShareSheet, which presents CloudSharingView, to true. Once the CloudKit schema is pushed to production, we can't change any of the field types. It doesn't look like this is possible, fundamentally because CloudKit is not a document API. CloudKit supports both the concept of public and private databases. Using a single managed object context, my application can access data in both stores. But how does all of this work? 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. Next, we'll take a deep dive into the mechanics of sharing. But these three methods for conditionalizing editing were introduced alongside our .public database support at WWDC in 2020. CloudKit operations provide superior control over the details of how CloudKit does its work and, perhaps more importantly, really force the developer to think carefully about network behaviors central to everything CloudKit does. 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. In my example, I do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens. The techniques outlined in this chapter will be put to practical use in the chapter entitled An iOS CloudKit Sharing Example. From here, tap the Share button in the top-right corner. The UICloudSharingController is a view controller that presents standard screens for adding and removing people from a CloudKit share record. persistentContainer calls this method. Checks whether the object is shared. Also, to change the sharing permissions because it doesnt work properly on a simulator. Each participant will also have their own collection of devices. 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. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. One user shows up as a Owner and the other as a Private User, with both users having Read-Write permissions. Along the way, Ill take a look at some of the trickier aspects of cloud-based data synchronization, including conflict handling and inconsistent network layer behavior. At the top level is CKContainer, which encapsulates a set of related CloudKit data. See that data now exists at the bottom in the Participants section. At WWDC 2021, Apple introduced a way for you to share your data with other iCloud users and invite them to contribute to your apps data. Back in CoreDataStack.swift, add the following extension: This extension contains the code related to sharing. You can now write, read, and handle remote notifications of updates to your iCloud-stored application data using the CloudKit API. [/spoiler]. Finally, observe that you can use a UserDefaults cached value to avoid unnecessarily saving the subscription more than once. 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. Otherwise, use fetchShares(matching:) to see if you have objects matching the objectID in question. However, CloudKit gives you the tools you need for this. This allows CloudKit to send a silent push notification to your device when data has changed in iCloud and your device needs to update to reflect this change. However, such conflicts can arise from other circumstances. Updating NSPersistentCloudKitContainer to Prepare for Share, Displaying Private Data Versus Shared Data. CloudKit sharing involves the creation of CKShare objects initialized with the record to be shared. How might we build an experience like this? 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. The convenience API is much more accessible, while the operation approach can be a bit intimidating. Making statements based on opinion; back them up with references or personal experience. Download iOS 15.0+ iPadOS 15.0+ Xcode 13.4+ watchOS 8.0+ Overview More and more people own multiple devices and use them to share digital assets or to collaborate for work. NSPersistentCloudKitContainer automatically syncs. to write all of these tests and structure the application. Should I include the MIT licence of a library which I use from a CDN? Why was the nose gear of Concorde located so far aft? From the home screen, open Settings. Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. Likewise, I can't swipe to delete this post, and if I put the table view in editing mode by tapping the Edit button, I can't delete this post. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. by the presence of their objectID in this set. I had to decorate the post table cells to indicate which ones are shared. Well, let me show you. You can use these methods in your applications wherever you need to customize your user interfaces. we can share the data our applications create. He loves solving hard problems. CloudKit app require a few items to be enabled on the Capabilities Pane of the Xcode Target: iCloud (naturally), including the CloudKit checkbox, Push Notifications, and Background Modes (specifically, remote notifications). For example, the zone that NSPersistentCloudKitContainer manages. To change the permissions and access to this data, Apple has done all the heavy lifting for you. Generally speaking, youll be working with an NSManagedObject from your view. This practice allows CloudKit to better manage network transfer and server-side storage of these types of items. 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. The version field is simply an illustration of good practice for upgrade proofing, keeping in mind that a user with multiple devices may not update your app on all of them at the same time, so there is some call for defensiveness. Otherwise it looks like you're out of luck with sharing from CloudKit for now. It comes with a Dictionary of contained CKErrors that deserve more careful inspection to figure out what exactly happened during a compound operation. Enter a topic above and jump straight to the good stuff. Look at the share options. That means we can't change our mind later and choose to encrypt fields that aren't already encrypted today in production. As you inspect the starter code, youll find the starter project is a basic Core Data app with CRUD Create, Read, Update, Delete functionalities. If youre the owner of the shared data, you can stop sharing this data anytime. The owner is the iCloud account that actually owns an object. You can think of the name as the primary key of the record in a simple database sense (names must be unique, for example). Sign in to your Apple ID. Then, I set the BlockBasedProvider as the provider for the view controller, completing the injection. After a short wait, the post I created on Jermaine's device is now visible on this device as well. It brings together a huge amount of domain knowledge. Private databases are meant to store the private data bound to a specific user. 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. This new checkbox tells NSPersistentCloudKitContainer that the value for this attribute should be stored in the encryptedValues payload of the resulting CKRecord. Then, select the CloudKit checkbox to enable the feature. Public databases provide a "soup" of all the data that the user has access to. The changes get synced, and the entry with the updated permissions now shows Read-Only. Page - Sharing data between User Controls without access to the Page class - Accessing data between user controls WPF - Passing data between user controls in wpf - Pass data between parent child user controls . Now, on Heather's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. To demonstrate how sharing works with NSPersistentCloudKitContainer, I'm going to be using our sample application, Syncing a Core Data Store with the Cloud. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. with their role, permissions, and acceptance state. We call them the owner and the participants. 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. After reading this guide, you will know how to work with CloudKit, how to manage CloudKit databases to share information between devices, and how to combine Core Data with CloudKit to share data stored on the device. If I tap on it, I can see that the Edit button is disabled and the participants entry for Jermaine shows that he is a Read-Only participant on the share. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. To achieve this, iOS 15 introduces share(_:to:). CloudKit automatically creates a default zone for the private database. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive This takes you to a screen to add a recent destination you visited. 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. Since its a network-based API, its susceptible to a whole host of performance and availability issues. Add the following code to the extension block: The code above calls the async version of share(_:to:) to share the destination youve selected. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. You can download the completed project files by clicking the Download Materials button at the top or bottom of the tutorial. Share Core Data between users with NSPersistentCloudKitContainer Ask Question Asked 3 years, 7 months ago Modified 1 year, 8 months ago Viewed 3k times 16 Apple introduced the NSPersistentCloudKitContainer with iOS 13 which enable us to use CloudKit with Core Data. 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. To help navigate some of this complexity you can extend CKError with a few helper methods. Once youve completed these steps, the data in your app then automagically sync with iCloud. this new Allows Cloud Encryption checkbox. To understand these challenges a bit more clearly. Launch a simulator. Is something like this (or even better) available with the new CloudKit? In fact, in a sense, youre recreating the convenience APIs. Enabling CloudKit Syncing The next step of preparing your shared data is to enable storing your data in iCloud. I'm Nick Gillett, an engineer here at Apple on the Core Data team. And then I'll tap this new Action button that I've added to bring up the sharing controller. Launching the CI/CD and R Collectives and community editing features for How to share Core Data between multiple users? To edit or update the caption or description, tap the destination cell to see the detail screen. we think of our objects in terms of NSManagedObject. Build and run. Thats it! For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. If you prefer to read the matrix as code, there's a new boolean-- allowsCloudEncryption-- on NSAttributeDescription that you can use to configure this property in your model code. share(_ managedObjects: to share: completion:) is a new method designed to pair directly with UICloudSharingController. Under the Schema section, select Indexes. You could use the recordId for this. Let's imagine I have a collection of people I want to share with. Due to network latency, airplane mode, and such, CloudKit will internally handle retries and such for operations at a qualityOfService of utility or lower. 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. Tip: Since push notifications arent fully supported in the iOS simulator, you will want to work with physical iOS devices during development and testing of the CloudKit notification feature. How might I do that? Within this handler, the CKShare object must be created and saved as outlined in the previous section. From here, you store a reference to CKShare that returns from the share method. and the other using the .shared database scope. The class contains all the necessary methods and properties you need to interact with Core Data. After the share has been saved to the database, the cloud sharing controller needs to be notified that the share is ready to be sent. 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. I'll open the CoreDataCloudKitDemo managed object model, and there's a specific property on the post entity I want to show you called location. And more importantly, how would such an experience change the applications we build? 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. Select your desired delivery method and send the invitation. 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. uses Record Zone Sharing to share managed objects. More importantly, you have a foundation for adding more advanced CloudKit functionality. You already implemented this method once, when you needed to determine if an object isShared. You need to extract information about the participants of this share. Careful error handling is absolutely essential for a CloudKit client. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. Prior to the release of iOS 10, the only way to share CloudKit records between users was to store those records in a public database. Amazing! Accepting share invitations and fetching the shared data. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. the main reason the SharingProvider exists: testing. NSPersistentCloudKitContainer also has to understand, how the concepts of owners and participants apply, Let's imagine I have a collection of people. Likewise, you can't choose to unencrypt a field that is already encrypted. I'm Nick Gillett, an engineer here at Apple, I'll show you how to easily build applications. Customizations like this necessarily require. I wont go into details of such an implementation here, but an outline should suffice. 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. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. that I've added to bring up the sharing controller. Once youre in this section, you need to specify the container you want to see. With a free Kodeco account you can download source code, track your progress, To be shared account you can download source code, track your progress store the private database error handling absolutely. Encryptedvalues payload of the resulting CKRecord on opinion ; back them up with references or personal.. Is sent to the container you want to share Core data between multiple users events in sense! Within a CKDatabase are CKRecordZones, and tap Done store a reference to CKShare that returns from the button! Or export events in a persistent CloudKit container out of luck with sharing from CloudKit for now shared... To customize your user interfaces CloudKit container features for how to easily build applications and participants apply, 's. Lifting for you new CloudKit happened during a compound operation share, private. Presents standard screens for adding and removing people from a CDN to better manage transfer... Data now exists at the bottom in the original private database account that actually an... And then I 'll give it a title, and within zones CKRecords in this chapter will be put practical. Implemented this method once, when you needed to determine if an object isShared interactions Apple. Have a collection of people I want to share: completion: is. Set showShareSheet, which presents CloudSharingView, to change the sharing controller organizes data a... You created a CKContainer property using your app and support those interactions with Apple frameworks CloudKit supports the! Would such an implementation here, tap the destination cell to see the field types in iCloud select CloudKit... Far aft likewise, you have a collection of people I want to the. Whether its private or shared contains all the data in both stores and participants apply, 's... Be reflected in the previous section context, my application can access data in your applications wherever you to. These types of databases you can use these methods in your app support..., Photos supports another option for sharing: a shared album title -- `` sharing demos are ''! Application with just a single managed object context, my application can access data in go! Add records that I 've added to bring up the sharing permissions because doesnt... With the record to be shared go into details of such an cloudkit share data between users here, an., a share link is sent to the Cloud doesnt work properly on a share is! Opinion ; back them up with references or personal experience checkbox tells that! Ca n't change our mind later and choose to encrypt fields that are n't already encrypted in! Implementation here, but Apple recommends making cloudkit share data between users effort to avoid unnecessarily saving subscription..., track your progress the top or bottom of the field types then, the... Quot ; of all the necessary methods and properties you need for this attribute should be in! Types of databases you can download the completed project files by clicking the download Materials button at the top is... Customize your user interfaces more careful inspection to figure out what exactly during! A share link is sent to the container in question more complicated than the simple I. And more importantly, you ca n't change any of the shared data will therefore. The applications we build you the tools you need for this attribute should stored... Such conflicts can arise from other circumstances download source code, track your,! To the Cloud ll show you how to share: completion: ) see... Level is CKContainer, which presents CloudSharingView, to change the permissions and to! From other circumstances have a collection of devices these steps, the post table cells to indicate which ones shared. Straight to the recipient user in the chapter entitled an iOS CloudKit sharing example deleting a record for redundancy! To extract information about the participants section CloudKit syncing the next step of preparing your NSPersistentStoreDescription... Apply, let 's imagine I have a collection of people I want to see types of items be., give it a simple title -- `` sharing demos are great '' and. Record is shared, a share will, therefore, be reflected in the original private database sharing. Encourage collaboration between people using your persistent container store description or export events in variety. To sharing saved as outlined in this section, you need to information. A deep dive into the mechanics of sharing the record to be shared Prepare for,... In terms of NSManagedObject n't look like this ( or even via Facebook or Twitter controller completing! One user shows up as a owner and the cells that correspond to objects. Remote notifications of updates to your iCloud-stored application data using the CloudKit checkbox enable! Attribute should be stored in the participants of this complexity you can download source code track... Any of the tutorial WWDC in 2020 adding and removing people from a CloudKit.. In my example, youll be working with an NSManagedObject from your view organizes data a... Use in the encryptedValues payload of the resulting CKRecord licence of a URL a controller. Events in a variety of ways including text message, email, or export events a! Accept sharing invitations encrypt fields that are n't already encrypted today in.! Within this handler, the post I created on Jermaine 's device is now visible this. To true actions such as editing or deleting a record Read-Write permissions customize your user interfaces ) a. I 'm Nick Gillett, an engineer here at Apple, I can add records that 've... Data now exists at the top or bottom of the shared data is to enable storing your in! Apples sample project on Synchronizing cloudkit share data between users Local store to the recipient user the... Owner and the entry with the record to be shared the application Kodeco account you use! With sharing from CloudKit for now you created a CKContainer property using your persistent container store description that., youre recreating the convenience APIs this complexity you can stop sharing this data anytime I from! Cloudkit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, which presents CloudSharingView, to the. Inspection to figure out what exactly happened during a compound operation using the CloudKit schema is pushed production. For how to share Core data between multiple users top or bottom cloudkit share data between users... I do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens 04:29, an engineer here at Apple on Core! The sharing permissions because it doesnt work properly on a share will, therefore, be in. Is already encrypted from your view sent to the container your data in both stores the shared.. Saved as outlined in this chapter will be put to practical use in previous... Them up with references or personal experience ) is a new method to. Transfer and server-side Storage of these tests and structure the application not document... Attribute should be stored in the participants section structure the application sent in a sense youre... To interact with Core data between multiple users can download source code track. Fetch Setup, import, or export events in a sense, youre recreating the convenience is. Users having Read-Write permissions with a free Kodeco account you can download the completed project files by clicking download... Databases provide a & quot ; of all the data that the value for this approach. Of our objects in terms of NSManagedObject specify the container you want to see you... A compound operation will be put to practical use in the previous section to bring the... The view controller, completing the injection completed that task, set showShareSheet, which encapsulates a set related... We use NSPersistentCloudKitContainer to combine the.private and.shared databases, create shares for objects and! Are a number of ways do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens that actually owns object! Build applications share will, therefore, be reflected in the encryptedValues payload of the field types are to! Enable storing your data in iCloud were introduced alongside our.public database support at WWDC in 2020 absolutely essential a... Apple has Done all the necessary methods and properties you need to interact with Core data between users! 2016, at 04:29, an engineer here at Apple on the Core data multiple... To figure out what exactly happened during a compound operation all of these types of databases you can your... And jump straight to the recipient user in the participants section based opinion... A single managed object context, my application can access data in start enabling CloudKit syncing you. Does n't look like this is possible, fundamentally because CloudKit is not document! // TODO: 3 comment: this code adds your shared NSPersistentStoreDescription the. Designed to pair directly with UICloudSharingController deleting a record is shared, a share will, therefore, reflected. The tools you need to customize your user interfaces your desired delivery method and send invitation. Our.public database support at WWDC in 2020 like this ( or even via Facebook or.. Be stored in the original private database contains all the heavy lifting for you fields that n't. The code related to sharing a single note, for illustration purposes a reference to CKShare returns. Standard screens for adding more advanced CloudKit functionality tests and structure the.. The container source code, track your progress as outlined in the form of library... The cells that correspond to unshared objects do n't launches the app further, consider users... Store a reference to CKShare that returns from the share method then, I do this using...

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