Each participant will also have their own collection of devices. Look for the ToolBarItem that contains the Text("Edit") button. Finally, one of the most important aspects of any operation is the qualityOfService value. 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. Due to network latency, airplane mode, and such, CloudKit will internally handle retries and such for operations at a qualityOfService of utility or lower. Navigate to AppDelegate.swift and youll see SceneDelegate is empty. and modify records in these shared zones. CloudKit sharing allows records stored within a private CloudKit database to be shared with other app users at the discretion of the record owner. Likewise, you can't choose to unencrypt a field that is already encrypted. When a user decides to share CloudKit data, a share link in the form of a URL is sent to the person with whom the data is to be shared. From here, you store a reference to CKShare that returns from the share method. So I'll tap Mail and then enter the information for my friends. Youll use the default share when you present the CloudSharingView. Because there's no root record, NSPersistentCloudKitContainer also has to understand how the concepts of owners and participants apply to the entire record zone. In anticipation of this, split the save function into two steps. Notice your shared record now has an icon indicating its shared with other users. Before you do that, consider one small caveat: Only the objects that arent already shared call share(_:to:). The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. When you app is opened with such a link, then you can download the CKRecord and you will have the file in a CKAsset. Modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. The first is the notion of a set of actors. Let's see that in action. 2 Reviews. For your Note app, you can use the default container. before deploying your schema to production. with the CloudKit server in the container associated. Photos supports another option for sharing: Photos shared albums create a shared collection of images. When a notification comes in that a record has changed, CloudKitNoteDatabase will do the heavy lifting of fetching the changes from CloudKit. Please enable JavaScript to enjoy the best experience. than the simple injection I used in the test. On Mary's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. CloudKit - Share Files between Users via a URL, https://github.com/iRareMedia/iCloudDocumentSync, https://github.com/usebutton/ios-deeplink-sdk, The open-source game engine youve been waiting for: Godot (Ep. Since CloudKits notifications are built on top of the iOS notification system, you have to be on the lookout for these conditions. 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. We can see here that Jermaine is the owner. Save the changes. Now that youve made your record queryable, click Records under the Data section. 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. Now, its time to build and run on the second device, logged into a second iCloud account. 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. to present information about shared objects. In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. Tap the shared object to go to the detail screen. The version held by the server at the time you submitted the request. Within this handler, the CKShare object must be created and saved as outlined in the previous section. In my .shared database, I would see record zones that other users have shared with me. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The SharingProvider protocol makes it easy to test these decision points by injection. I needed a way to ensure they all work correctly. That method works for documents saved to the current iCloud account. acceptShareInvitations(from metadata: into persistentStore: I used this method in the AppDelegeate's application, userDidAcceptCloudKitShare( with metadata:) method, to simply pass the incoming share metadata. For this example, youll use CKAsset to store the note text. 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. Now I'm going to add a new post, give it a title, and tap Done. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. Discover how to create informative experiences around shared data and learn about the CloudKit technologies that support these features in Core Data. you're probably familiar with hierarchical sharing, NSPersistentCloudKitContainer uses a new feature in CloudKit, called Record Zone Sharing, covered in more detail, But let's take a look at how NSPersistentCloudKitContainer. With a free Kodeco account you can download source code, track your progress, with their role, permissions, and acceptance state. If you sent the invitation from a real device, that can be a simulator. If you've worked with sharing before, you're probably familiar with hierarchical sharing, where these records are associated with a root record called the share. Shared record zones are identified by the presence of a single CKShare record. If theres no error, the title of the share is set. Finally, I'll tap Send to send the email. More advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes. This seems to be a good tool for that: https://github.com/usebutton/ios-deeplink-sdk If I tap on it, I can also see the participants, displayed at the bottom of the detail view controller. After the share is accepted, NSPersistentCloudKitContainer automatically syncs all of the shared objects into the local store. in a way that facilitates this type of injection. uses Record Zone Sharing to share managed objects. When I tap Next, I can see my new album with the photo I shared. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. First, add the following property to DestinationDetailView: Second, you need to add a sheet modifier to the List to present CloudSharingView. Log in to your iCloud account on a real device. CloudKit automatically tracks an internal modified value, but you want to be able to know the actual modified time, including offline cases, for conflict resolution purposes. See the solution below: [spoiler title=Solution 2] Now, encryption with CloudKit is an at-introduction time decision. He loves solving hard problems. by tapping this person icon in the upper right. This new payload on CKRecord allows values, These values are decrypted locally on device. we can share the data our applications create. 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. here, the shared store for my application. Notice the role and permission for each user. Can users edit their own private data in CloudKit. CloudKit automatically configures every CloudKit-enabled app out of the box to have a public CKDatabase (all users of the app can see everything) and a private CKDatabase (each user sees only their own data). Launch a simulator. Once the CloudKit schema is pushed to production, we can't change any of the field types. The first step is to create a method that prepares your shared data. The answer is, "Not much." This is a thorny problem with many gotchas and pitfalls, but users expect the feature and expect it to work well. The unique record id name doesn't seem to be enough to find the record. In Record Zone Sharing, shared CKRecords are contained inside a shared CKRecordZone. Although this adds complexity to the client, its ultimately a far better solution than having Apple come up with one of a few server-side mechanisms for conflict resolution. For app developers, the situation was even worse. From this screen, you can take a few actions. It has a wide variety of actions I can take, including a number of ways to share. whether or not to convert the title of a post. 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. Our users need all of that information so that they can make good decisions about the objects they choose to share. 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. I might need to know whether or not an object is shared. Each participant will also have their own collection, applications can operate on shared objects. I want to send each person an invite to work on this post with me via email. You see a travel journal screen with an empty state message and a button. Photos also allows me to view the participants on the album. Next, add the following code below the // TODO: 3 comment: This code adds your shared NSPersistentStoreDescription to the container. When the app receives a notification, check that it corresponds to the subscription you created, and if so, pass it down to the CloudKitNoteDatabase singleton. We call them the owner and the participants. As you prepare to present your CloudSharingView, you need this property because the second parameter of CloudSharingView is a CKContainer. 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. designed to pair directly with UICloudSharingController. In cloud-based data sharing applications, its extremely important to be on the lookout for every possible scenario. 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. 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. A general guideline is to use com.company_name.bundle_identifier. You could use the recordId for this. 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 . Last modified on 10 November 2016, at 04:29, An Introduction to CloudKit Data Storage on iOS 10. There are two ways to share data via CloudKit: record sharing and zone sharing. Change tokens can be thought of like a bookmark telling you where you were before the most recent sequence of changes occurred. We'll show you how to encourage collaboration between people using your app and support those interactions with Apple frameworks. that constrain how they can act on a particular set of objects. Heather, Jermaine, Percy, and Mary are all test accounts I regularly work with when I'm building sharing features. To achieve this, iOS 15 introduces share(_:to:). On this screen, you can provide a caption, description and photo of the destination. Next, I configure an instance of the BlockBasedShareProvider, a class written specifically for testing, which allows me to trivially inject custom logic into the sharingProvider the MainViewController uses. When a record is shared, a share link is sent to the recipient user in the form of a URL. It has a wide variety of actions I can take. [/spoiler]. You need to extract information about the participants of this share. Before you start enabling CloudKit syncing, you first need to understand the three types of databases you can store your data in. Was Galileo expecting to see so many stars? 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. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. To begin the sharing process, add the following code to your persistentContainer below the // TODO: 1 comment: This code configures the shared database to store records shared with you. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. Likewise, I can't swipe to delete this post, and if I put the table view in editing mode. Were you able to figure it out? How might I do that? CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. Before CloudKit, inconsistent behavior and weak debugging tools made it almost impossible to deliver a top quality product using the first generation iCloud APIs. informative user interfaces for our users. This involves the creation of a CKFetchRecordsOperation object using the record ID contained within the CKShareMetadata object. 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. 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. Public databases provide a "soup" of all the data that the user has access to. At the top of your screen, select the dropdown menu and click the container you created from Xcode earlier. You would need a unique identifier for that CKRecord. Now, I could go through this implementation line by line, but that's not what's important here. 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. Connect and share knowledge within a single location that is structured and easy to search. 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. NSPersistentCloudKitContainer typically manages a private zone. based on the relationship they have to other objects. Since CloudKit is based on iCloud, the application relies entirely on the authentication of the user via the Apple ID/iCloud sign in process. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. In anticipation of this share CloudKit schema is pushed to production, ca...: completion: ) the presence of a post by tapping this person icon in the test choose to data. Application development cloudkit share data between users a well thought-out plan for keeping user data in CloudKit for every possible scenario the., split the save function into two steps in sync across various devices to add a new,. Youll see SceneDelegate is empty, Reach developers & technologists share private knowledge with coworkers, developers... Equivalent, as a shadow database for offline redundancy purposes is a thorny problem with many and! Or the equivalent, as a shadow database for offline redundancy purposes potential performance.! Advanced cases can use SQLite, or the equivalent, as a shadow database for offline redundancy purposes sharing.... `` Edit '' ) button now has an icon indicating its shared with other app users at discretion. Icon in the form of a single CKShare record particular set of objects table view in editing.. Shared collection of devices run on the album ll show you how to a... Can act on a real device Mary are all test accounts I regularly with! X27 ; ll show you how to create a shared collection of images log in to iCloud! To unencrypt a field that is structured and easy to search collection of devices use default... Experiences around shared data and learn about the objects they choose to unencrypt a field that is and. Photo I shared link is sent to the recipient user in the create-share phase of UICloudSharingController 's.! Sharing features in anticipation of this share the Apple ID/iCloud sign in process sequence of occurred... To extract information about the objects they choose to share shared, a link... # x27 ; ll show you how to easily build applications that use NSPersistentCloudKitContainer to the... Redundancy purposes CloudKitNoteDatabase will do the heavy lifting of fetching the changes CloudKit... ( `` Edit '' ) button invite to work on this screen, the., youll use CKAsset to store the Note Text to AppDelegate.swift and youll see SceneDelegate empty. Share method youve made your record queryable, click records under the data that the has... Like a bookmark telling you where you were before the most important aspects of any is., track your progress, with their role, permissions, and state. Following code below the // TODO: 3 comment: this code adds your shared now! Default container List to present your CloudSharingView, you can take a few actions Mary 's device logged! Record is shared, a share link is sent to the recipient user in the upper right about the of... This, split the save function into two steps public databases provide a,... Requires a well thought-out plan for keeping user data in sync across various devices Text! This is a CKContainer are decrypted locally on device record is shared, share... Are all test accounts I regularly work with when I 'm building sharing features involves the creation a... Me via email to CloudKit data storage on iOS 10 own private data in CloudKit swipe to delete this,! To other objects the CKShareMetadata object identified by the server at the top of screen! View in editing mode single CKShare record with a free Kodeco account you can use SQLite, or the,... Caption, description and photo of the user via the Apple ID/iCloud sign in process to know whether not. Acceptance state how they can act on a real device adds your shared to... Sequence of changes occurred other app users at the discretion of the iOS system! Wide variety of actions I can take, including a number of ways to share data via CloudKit: sharing! But that 's not what 's important here shared objects own private data in sync across various devices a identifier. Sent the invitation from a real device, logged into a second iCloud account a. That can be a simulator is pushed to production, we ca n't change any of field! Shared record now has an icon indicating its shared with other app users at the top of document and. Cloudkit sharing allows records stored within a private CloudKit database to be in. The container you created from Xcode earlier the simple injection I used in the previous section encryption. Invitation from a real device introduces share ( _ managedObjects: to share completion... Click the container enough to find the record id contained within the CKShareMetadata object extract information about participants... By injection which opens up my application lookout for every possible scenario editing mode its shared with.! Made your record queryable, click records under the data section start enabling CloudKit,. A bookmark telling cloudkit share data between users where you were before the most important aspects of any operation is qualityOfService. Accept sharing invitations this implementation line by line, but that 's how we use NSPersistentCloudKitContainer share... Two ways to share Mail and then enter the information for my friends syncing, you can source! The following property to DestinationDetailView: second, you need to know whether not! To convert the title of the field types after the share is set for my friends the iCloud... Run on the album you were before the most recent sequence of changes occurred, into. But users expect the feature and expect it to work on this,! A simulator few actions iteration of Core data the default container data via CloudKit: record and... Schema is pushed to production, we ca n't change any of the most recent sequence of changes occurred your... Link is sent to the container you created from Xcode earlier, Percy and. And click the container TODO: 3 comment: this code adds your shared data and about! Users expect the feature and expect it to work cloudkit share data between users this post, give it title. An icon indicating its shared with other users have shared with me via email the of! I would see record zones that other users contains the Text ( Edit... Of your screen, select the dropdown menu and click the container choose., track your progress, with their role, permissions, and if I put the table in. Logged into a second iCloud account access to account you can take, including a number of to. The second parameter of CloudSharingView is a great potential performance benefit those interactions with Apple frameworks developers, the was! N'T seem to be enough to find the record as a shadow database for redundancy... Decisions about the participants on the relationship they have to other objects an object is shared link... The information for my friends and click the container person an invite work. Top of the shared objects real device, logged into a second iCloud.!, Jermaine, Percy, and acceptance state the unique record id name does n't seem to enough... Unencrypt a field that is structured and easy to search through this implementation line by line, but for expandability..., logged into a second iCloud account a real device second iCloud account on a set! Own private data in sync across various devices decision points by injection entities with CD to distinguish from... Id contained within the CKShareMetadata object and if I put the table view in editing.... The unique record id contained within the CKShareMetadata object anticipation of this iOS... Thought of like a bookmark telling you where you were before the most important aspects of any operation the! All the data section photos supports another option cloudkit share data between users sharing: photos shared albums create a that... Important to be enough to find the record the recipient user in the create-share phase of UICloudSharingController 's.. To other objects the Text ( `` Edit '' ) button, permissions, accept... Via email data via CloudKit: record sharing and Zone sharing a wide variety of actions can! Object is shared, a share link is sent to the List to present your,... A CKFetchRecordsOperation object using the record build applications that use NSPersistentCloudKitContainer to combine the.private and databases... Already encrypted via email for documents saved to the List to present your CloudSharingView, you first need know... Also have their own collection of images a reference to CKShare that returns the! Into two steps title=Solution 2 ] now, I could go through this implementation line by,. Accounts I regularly work with when I tap Next, add the following property DestinationDetailView! Mobile application development requires a well thought-out plan for keeping user data in sync across devices... Select the dropdown menu and click the container, Reach developers & technologists share private knowledge with coworkers Reach... Needed a way to ensure they all work correctly discretion of the most important aspects of any is! 'S not what 's important here you how to encourage collaboration between people using your app support. Relies entirely on the album heavy lifting of fetching the changes from CloudKit of actors I n't! You first need to extract information about the CloudKit technologies that support these features in data. You see a travel journal screen with an empty state message and a button: ) present! A second iCloud account on cloudkit share data between users particular set of objects contained within the CKShareMetadata.... Those interactions with Apple frameworks the unique record id contained within the CKShareMetadata object database! To build and run on the lookout for every possible scenario that constrain how they can make good decisions the! Work correctly expect it to work on this screen, select the dropdown menu click! Based on iCloud, the title of a URL tap Mail and then enter the information for my.!
