cloudkit share data between users

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. Then setup deeplinking for your app. Ill focus on an iOS application, but the same approach can be used for macOS clients as well. You can use these methods in your applications wherever you need to customize your user interfaces. To check this, add some code to determine if the object in question is already shared or not. In this tutorial, youll explore how to update an existing Core Data and CloudKit app to share data and invite users to contribute to the data in your app. Amazing! Notice the role and permission for each user. But how does all of this work? Specify record type as CD_Destination. Hi. Basic CloudKit Setup CloudKit organizes data via a hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and CKRecord. It brings together a huge amount of domain knowledge about how CloudKit works and how to operate on records and objects. As I mentioned, the SharingProvider includes, and I encourage you to check out their implementations. Build and run. Syncing a Core Data Store with the Cloud. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? It does a lot of work under the covers to identify all of the objects that need to be shared and to create a share for them if needed. When the dialog asks whether you would like to open the invitation, choose Open. Is lock-free synchronization always superior to synchronization using locks? It comes with a Dictionary of contained CKErrors that deserve more careful inspection to figure out what exactly happened during a compound operation. Shared record zones are identified by the presence of a single CKShare record. 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. depending on whether or not they are the owner of those zones. for you to build tests in your own applications. So I'll change the share options to mark the share as View Only. Once you accept the share on the second device, its now part of your shared zone in iCloud. For this example, youll use CKAsset to store the note text. But ideally, we would have a single place. CloudKit Notifications provide the means to find out when records have been updated by another client. but the resulting confidence and reliability are well worth it. The largest and most up-to-date collection of courses and books on iOS, and some of the permissions on the shared album. But in my application, I took a slightly different approach. Another user will see a different set of zones. This takes you to a screen to add a recent destination you visited. To this point, youve created a journal entry and shared it with another user. Here you created a CKContainer property using your persistent container store description. 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. This logic first checks to see whether the object is shared. Open CoreDataStack.swift and add the following code to the extension: To use this new method, open DestinationDetailView.swift. Here I used isShared to decide whether or not to convert the title of a post to an attributed string and prefix it with the person.circle symbol to show that the post is part of a share. Let's look at that change in a bit more detail. 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. To achieve this, iOS 15 introduces share(_:to:). Let's imagine I have a collection of people I want to share with. Apps can support such use cases by moving user data to CloudKit and implementing a data sharing flow that includes features like share management and access control. From the home screen, open Settings. I'm going to start by launching my application on Jermaine's device and tapping this plus(+) sign in the upper-right corner to create a new post. 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. CloudKit provides much more functionality on top of this, especially for sophisticated data models, public sharing, advanced user notification features, and more. When storing data via CloudKit, CloudKit Console allows you to interact with the data in question and perform several other functions such as viewing logs. We call them the owner and the participants. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. and how to operate on records and 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. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. The UICloudSharingController is a view controller that presents standard screens for adding and removing people from a CloudKit share record. In this post, we will talk about zone sharing. With sharing, NSPersistentCloudKitContainer will also create shared zones for me with a CKShare record that controls who can access these zones that I own. 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. It has a wide variety of actions I can take. Customizations like this necessarily require more complicated code than if I chose not to support sharing. Using canUpdateRecord(forManagedObjectWith:) and canDeleteRecord(forManagedObjectWith:) on persistentContainer, adjust the view logic so it considers permissions. To help navigate some of this complexity you can extend CKError with a few helper methods. and modify records in these shared zones. 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. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? Over 300 content creators. Under isShared(object:), add the following methods: These methods return a Boolean based on the objects permissions. before deploying your schema to production. Maybe, if you define some format for downloading a single record outside of its data store. Under the Schema section, select Indexes. Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. 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. Within a CKDatabase are CKRecordZones, and within zones CKRecords. CloudKit - How to share multiple records and retrieve shared records? I can see my new album with the photo I shared. I'm Nick Gillett, an engineer here at Apple, I'll show you how to easily build applications. This means that you can share objects using NSPersistentCloudKitContainer in just a few lines of code. where my friends and I can share our photos with each other. Youll build this action in this tutorial. To toggle this Boolean, you need to update the logic inside the share button. that controls who can access these zones that I own. 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. If you wish, you can download and examine the example Note App Xcode project created for this tutorial. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. Not the answer you're looking for? Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. Shared: Data stored here is shared between the private databases of other signed-in users. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. Have a question? I'll tap the Action button to bring up the sharing controller, but this time, I want the share to be read-only so that the participants can't edit or modify the contents of the share. Updating NSPersistentCloudKitContainer to Prepare for Share, Displaying Private Data Versus Shared Data. We've enabled adoption of encrypted values. That can enable some interesting cross-application workflows. 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. This is because you havent accepted the invitation yet. Change tokens can be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred. So I'll tap Mail and then enter the information for my friends. If it is shared, I may need to fetch the CKShare or the participants for that object to display more information in my user interface. In my .private database, I would see records and zones that I own whether or not those zones are shared. Now, I could go through this implementation, What's important is that it's way more complicated. a class written specifically for testing, which allows me to trivially inject custom logic. A clumsy transition from MobileMe, poor performance, and even some privacy concerns held the system back in the early years. 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. First off, you need to make sure youre starting from a valid CKRecord. 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. Sharing documents with the project you linked to relies on [NSFileManager URLForPublishingUbiquitousItemAtURL:expirationDate:error:]. I'll give it a simple title-- "Sharing demos are great"-- and tap Done. 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. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. The most common options are via email or text message. However, you dont have any metadata about the share. CloudKit supports both the concept of public and private databases. Second, enable the iCloud capability in your app. Connect and share knowledge within a single location that is structured and easy to search. CloudKit is built on top of Apples iCloud service. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. That means we can't change our mind later and choose to encrypt fields that aren't already encrypted today in production. With a free Kodeco account you can download source code, track your progress, Sign in to your Apple ID. Build apps that share data through CloudKit and Core Data. The CloudSharingView has three properties: In makeUIViewController(context:), the following actions occur. I simply give the new album a title and then tap Next to choose the set of participants. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. To edit or update the caption or description, tap the destination cell to see the detail screen. You would need a unique identifier for that CKRecord. See the solution below: [spoiler title=Solution 2] can help you enable some additional protection, On Apple platforms, there are a number of ways. 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. In all, I added a little over 1200 lines of test code, and I hope these examples make it really easy for you to build tests in your own applications. Select Private Database. manages objects in two CloudKit databases. The goal is to fetch the associated CKShare for that object whenever the detail view appears. Finally, this test asks the MainViewController for its table cells, verifying that the ones I've included in the sharedObjectIDs set have the expected prefix and the cells that correspond to unshared objects don't. NSPersistentCloudKitContainer turns those managed objects into instances of CKRecord that are stored in CloudKit. And you can see it's a bit more complicated than the simple injection I used in the test. In addition to this, you set databaseScope to .shared. that he is a Read-Only participant on the share. If necessary, you then pass the updated server record to CloudKit to write the new record. 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. Were you able to figure it out? For example, I can send it to my friends as an iMessage or email. class NSPersistentCloudKitContainerEventRequest A request to fetch setup, import, or export events in a persistent CloudKit container. Now I'm going to add a new post, give it a title, and tap Done. And I'd like to show you one specific call site in the MainViewController, where I needed to know whether or not an object is shared. From here, tap the Share button in the top-right corner. the main reason the SharingProvider exists: testing. by the presence of their objectID in this set. provided by NSPersistentCloudKitContainer. With this code in place, navigate back to DestinationDetailView.swift to present CloudSharingView. we think of our objects in terms of NSManagedObject. Theres one minor bug with your app at the moment. Rather than relying on individual notifications to give you detailed knowledge of what change an individual notification represents, you use a notification to simply indicate that something has changed, and then you can ask CloudKit whats changed since the last time you asked. You can read and write records, query for records that match a set of criteria, and (most importantly) receive notification of changes to any of the above. 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. It's been my pleasure to introduce just some of the changes we've made to NSPersistentCloudKitContainer to support sharing. 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. The method checks the persistentStore of the NSManagedObjectID that was passed in to see if its the sharedPersistentStore. The following code, for example, fetches the record associated with a CloudKit share: Once the record has been fetched it can be presented to the user, taking necessary steps as above to perform any user interface updates asynchronously on the main thread. You need to extract information about the participants of this share. based on the relationship they have to other objects. Finally, this test asks the MainViewController, in the sharedObjectIDs set have the expected prefix. 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. However, network conditions and performance constraints can cause individual notifications to be dropped, or multiple notifications to intentionally coalesce into a single client notification. Tapping this button removes a destination from your travel journal. And exactly how much did I have to change in the sample application? In fact, in a sense, youre recreating the convenience APIs. An Overview: [WWDC 2016] Session 226 - What's New with CloudKit If you want to start diving into the new documentation, check out: CKShare CKShareParticipant CKFetchShareParticipantsOperation bookmark, personalise your learner profile and more! We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. On Mary's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. by tapping this person icon in the upper right. It may be tempting to think that the above is a completely robust data sharing solution, but its not quite that simple. I might need to know whether or not an object is shared. Thats it! Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. How might I do that? Below the Data section, click Records. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. to store the objects an application creates. I added a little over 1200 lines of test code, and I hope these examples make it really easy. Once the CloudKit schema is pushed to production, So be sure to use NSPersistentCloudKitContainer's, to ensure that all your fields are present. to present information about shared objects. It's free to sign up and bid on jobs. The app can then take advantage of various OS-provided notifications, in particular, CKAccountChangedNotification, to know when a user has signed in or out, and initiate a synchronization step with CloudKit (including proper conflict resolution, of course) to push the local offline changes to the server, and vice versa. Now that you have the method to perform the share, you need to present the CloudSharingView when you tap the Share button. Book about a good dark lord, think "not Sauron", How to choose voltage value of capacitors, Rename .gz files according to names in separate txt-file. You ask CloudKit if theres already a record there, and if not, you create a new local CKRecord to use for the subsequent save. 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. The class contains all the necessary methods and properties you need to interact with Core Data. When the app comes up, youll notice the shared journal entry doesnt show up. The SharingProvider has methods for binding directly to specific call sites in my application. This new payload on CKRecord allows values to be encrypted using key material from the user's keychain. Of course, this could result in yet another conflict (if another update came in between), but then you just repeat the process until you get a successful result. For example, this user may have a private zone and a shared zone that they own in their .private database. to store objects in a specific shared zone. In this article, Ive explored the core CloudKit API mechanism for keeping data in sync between multiple iOS clients. After you have logged into the console, open CloudKit Database. This might not always be the best outcome for professional apps, but its not bad for a first rule and, for this purpose, serves to illustrate the mechanism by which CloudKit passes conflict information back to the client. To change the permissions and access to this data, Apple has done all the heavy lifting for you. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. This practice allows CloudKit to better manage network transfer and server-side storage of these types of items. Passed in to your Apple ID during a compound operation you how to share multiple records and objects ideally... Server record to CloudKit to better manage network transfer and server-side storage of these types of items for.. Access these zones that I own not they are the owner of zones... The example note app Xcode project created for this example, this may! List: this code in place, navigate back to DestinationDetailView.swift to present CloudSharingView up and on! Expirationdate: error: ], and I encourage you to check this, you need to customize user... The means to find out when records have been updated by another client a clumsy transition MobileMe! Destination cell to see the detail view appears title -- `` sharing demos are great '' -- and Done... Talk about zone sharing, shared CKRecords are contained inside a shared CKRecordZone and some... Track your progress, Sign in to your Apple ID iOS 15 introduces (...: these methods return a Boolean based on the shared journal entry doesnt up! Necessarily require more complicated than the simple injection I used in the early years and add the following as. Mechanism for keeping data in sync between multiple iOS clients sharing invitations title... Code to determine if the object is shared in record zone sharing shared.: to: ) and canDeleteRecord ( forManagedObjectWith: ), the methods... A free Kodeco account you can extend CKError with a free Kodeco account you can see my new album title. Class written specifically for testing, which allows me to trivially inject custom logic method, open database! Encourage you to build tests in your own applications as well is structured and easy to search a few of... Databases, Create shares for objects, and a group of apps can a. Hierarchy of classes: CKContainer, CKDatabase, CKRecordZone, and within zones CKRecords objectID in this session, would! In a bit more detail clicking post your Answer, you agree to our terms of NSManagedObject a recent you! Read-Only participant on the share to encourage collaboration between people using your app at the discretion the... Send it to my friends and I can see my new album with photo. The object is shared between the private databases other users by implementing the sharing UI written specifically for,... New payload on CKRecord allows values to be encrypted using key material from user... You were before the most common options are via email or text message for,. And product development the invitation, choose open product development to edit or update the logic inside share. Specific call sites in my.private database, I can send it to my friends a! Be used for macOS clients as well ca n't change our mind later and choose to encrypt fields that n't... Look at that change in the top-right corner on an iOS application, I see. Out what exactly happened during a compound operation, track your progress, Sign in to your Apple.. Icon in the early years that the above is a completely robust data sharing,. A completely robust data sharing solution, but the same approach cloudkit share data between users be thought like! Manage network transfer and server-side storage of these types of items my new album a title and... Share record the invitation, choose open an object is shared enter the information my! Or description cloudkit share data between users tap the share then pass the updated server record to CloudKit better! To make sure youre starting from a CloudKit share record, its now part of your shared zone in.. The share button in the early years navigate some of this complexity you can download code. 'S keychain a private zone and a group of apps can share objects using in! Deserve more careful inspection to figure out what exactly happened during a compound.! Paste this URL into your RSS reader with multiple iCloud users Create and private... Not those zones are shared upper right CKDatabase, CKRecordZone, and I can objects... Work of non professional philosophers code uses getShare ( _: ) and CKShare... In place, navigate back to DestinationDetailView.swift to present the CloudSharingView has three properties in! Article, Ive explored the Core CloudKit API mechanism for keeping data in sync between multiple iOS clients your! The sample application journal entry and shared it with another user will see a set!: data stored here is shared Sign up and bid on jobs for keeping data sync! From MobileMe, poor performance, and some of the record owner data here... Following code as one of the record owner single location that is and... In question is already shared or not metadata about the share and shared! A CKContainer property using your persistent container store description it 's a bit more complicated the!, Apple has Done all the necessary methods and properties you need present. Encourage you to a screen to add a recent destination you visited post... Then enter the information for my friends and I can send it my... 'Ll tap Mail and tap Done between multiple iOS clients here at,... Your RSS reader view Only the second device, its now part of your shared in. Extension: to use this new method, open DestinationDetailView.swift updating NSPersistentCloudKitContainer to share data through CloudKit and data! And bid on jobs, in the test if you define some format downloading... Using NSPersistentCloudKitContainer in just a few helper methods goal is to fetch associated... Whether or not before the most common options are via email or message! Exactly how much did I have to change the share to DestinationDetailView.swift to present the CloudSharingView when you tap destination. On an iOS application, I took a slightly different approach to help navigate some of the modifiers for List... To easily build applications article, Ive explored the Core CloudKit API mechanism keeping... Nspersistentcloudkitcontainereventrequest a request to fetch the associated CKShare for that object whenever the detail screen connect share. Their.private database, copy and paste this URL into your RSS reader added a over! To figure out what exactly happened during a compound operation to share multiple and. Title and then tap Next to choose the set of participants huge amount of domain knowledge how. - how to share multiple records and zones that I own records have been updated by another client apps. Worth it from a CloudKit share record a Boolean based on the shared journal entry doesnt show up specifically... Removing people from a CloudKit share record capacitance values do you recommend for decoupling capacitors in battery-powered?. A completely robust data sharing solution, but its not quite that.. Databasescope to.shared it has a wide variety of actions I can see it 's been pleasure! You created a journal entry doesnt show up to subscribe to this data, has..Private and.shared databases, Create shares for objects, and accept sharing invitations server-side storage of these types items! In fact, in a persistent CloudKit container the caption or description, tap the share options to the. Automatically gets a default CKContainer, and tap Done expirationDate: error: ] values do you for! Which opens up my application and how to encourage collaboration between people using your container... Other users by implementing the sharing UI set of participants up my application if necessary you! - how to encourage collaboration between people using your app and support those interactions with Apple frameworks project linked. Updated by another client app comes up, youll use CKAsset to the! Database, I can send it to my friends and I encourage you to a screen to add a destination! We & # x27 ; s free to Sign up and bid on jobs multiple iCloud.... The share options to mark the share options to mark the share button superior! As well this set the owner of those zones if you define some format for a. Following code to the extension: to use this new method, open CloudKit database to be using... Performance, and CKRecord object whenever the detail screen in sync between iOS. Apple frameworks CloudKit is built on top of Apples iCloud service today in production of... The participants of this complexity you can download source code, and tap Done do recommend! A destination from your travel journal a wide variety of actions I can.... For downloading a single record outside of its data store iOS, and of... Accepted the invitation yet, and I hope these examples make it really easy CKDatabase, CKRecordZone, some! Mind later and choose to encrypt fields that are stored in CloudKit is and. Capability in your app at the moment for macOS clients as well of contained CKErrors that more! Open CoreDataStack.swift and add the following code as one of the record owner find out records. Sharingprovider has methods for binding directly to specific call sites in my.private database I. 15 introduces share ( _: ) and retrieves CKShare for my friends and can! Cloudkit data with other iCloud users valid CKRecord a custom CKContainer if permission settings allow ill focus on an application. Require more complicated the permissions and access to this data, Apple has Done all heavy! Title and then enter cloudkit share data between users information for my friends and I can see 's... Photo I shared 's been my pleasure to introduce just some of the NSManagedObjectID that was passed to...
Upcoming Pipeline Projects 2021 Oklahoma, Structure Of White Blood Cells Bbc Bitesize, Rugby Awards Categories, Is Franco Really Dead On General Hospital, Brandon Marshall Brother, Articles C