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 . And you can see it's a bit more complicated than the simple injection I used in the test. Two separate iCloud accounts To initiate the sharing process. At the top level is CKContainer, which encapsulates a set of related CloudKit data. When the preparationCompletionHandler is called, it must be passed the share object and a reference to the apps CloudKit container. fetchShares(matching objectIDs:) is new in iOS 15 and allows me to get the CKShare for a specific post. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. How can I change a sentence based upon input to a command? before deploying your schema to production. 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. Since this is a first example of using an operation, here are a couple of general observations: First, all CloudKit operations have custom completion closures (and many have intermediate closures, depending on the operation). First, add the following property to DestinationDetailView: Second, you need to add a sheet modifier to the List to present CloudSharingView. You can now write, read, and handle remote notifications of updates to your iCloud-stored application data using the CloudKit API. to NSPersistentCloudKitContainer to support sharing. Here I'm setting the isSharedBlock to call the contains method of the set I created. Before an app can take advantage of CloudKit sharing, the CKSharingSupported key needs to be added to the project Info.plist file with a Boolean value of true. Next, I configure an instance of the BlockBasedShareProvider. A participant is any other iCloud account that is allowed to operate on those objects in some way. Last, open HomeView.swift and look for the swipeActions modifier. I've already saved Heather and Mary in my address book. The final topic I'd like to cover today is support for another new feature in CloudKit: encrypted CKRecord values. my application can access data in both stores. From this screen, you can take a few actions. So let's look at how I've changed my application to communicate these states and privileges. This doesn't seem to work. To dig deeper into CloudKit, I strongly recommend taking the time to view the various CloudKit presentations from each of the last few WWDCs and follow along with the examples they provide. 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. Shared: Data stored here is shared between the private databases of other signed-in users. I've configured it to be an optional Transformable attribute and checked this new Allows Cloud Encryption checkbox. share(_ managedObjects: to share: completion:) is meant to be invoked in the create-share phase of UICloudSharingController's workflow. Implicit in all of this is that CloudKit may not always be available. Differentiating private data and shared data in SwiftUI. Is something like this (or even better) available with the new CloudKit? Within this container, youre going to use the private database (because you want the users note to be seen only by that user) and within the private database, youre going to use a custom record zone, which enables notification of specific record changes. I've already modified it to support sharing posts with different iCloud users. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? Enter a topic above and jump straight to the good stuff. That can enable some interesting cross-application workflows. Careful error handling is absolutely essential for a CloudKit client. Please note all the code has explanatory comments at the key points. First, we'll discuss what sharing means with NSPersistentCloudKitContainer and how that affects the types of experiences you can build. Build and run. [/spoiler]. Build and run. Owners create and share objects with a set of participants. 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. where my friends and I can share our photos with each other. Shared record zones are identified by the presence of a single CKShare record. Now, its time to build and run on the second device, logged into a second iCloud account. I wont go into details of such an implementation here, but an outline should suffice. Click Add Basic Index. 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. Each participant will also have their own collection of devices. These days, modern mobile application development requires a well thought-out plan for keeping user data in sync across various devices. 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. can help you enable some additional protection, On Apple platforms, there are a number of ways. The owner is the iCloud account that actually owns an object. Add the following code, just above the existing sheet modifier: This code uses showShareSheet to present the CloudSharingView, when the Boolean is true. After a short wait, the post I created on Jermaine's device is now visible on this device. just as they can in the zones that I own. Im assuming you have a good handle on the basics of creating iOS apps in Xcode. Amazing! Because of this, when the app launches and you sync with iCloud, the data you have in iCloud synchronizes with your device and automatically displays. where I needed to know whether or not an object is shared. This view contains the logic for your share button. All the user needs to do at this point is enter the contact details for the intended share recipient and send the message. You ask CloudKit if theres already a record there, and if not, you create a new local CKRecord to use for the subsequent save. 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. Hi. So I'll tap Mail and then enter the information for my friends. Before CloudKit, inconsistent behavior and weak debugging tools made it almost impossible to deliver a top quality product using the first generation iCloud APIs. to call the contains method of the set I created. For SQLite-backed stores, Core Data provided ubiquitous persistent storage. Tapping that brings up the set of participants. Swift, Android, Kotlin, Flutter, Dart, Server-Side Swift, Unity, and more! 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 objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. 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. Add the following code as one of the modifiers for your List: This code uses getShare(_:) and retrieves CKShare. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Likewise, I can't swipe to delete this post, and if I put the table view in editing mode. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Add the following modifier to the Button: With this code in place, only users with the proper permissions can perform actions like editing or deleting. I and, if allowed, other participants can add and modify records in these shared zones. NSPersistentCloudKitContainer shares objects. Third, create an iCloud container that hosts your data in iCloud. NSPersistentCloudKitContainer turns those managed objects into instances of CKRecord that are stored in CloudKit. On Mary's device, I'll open Mail and tap the link inside the email I sent, which opens up my application. 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. wherever you need to customize your user interfaces. In this example, theres just the one record, but for future expandability, this is a great potential performance benefit. However, to allow other users to interact with this data, you need to update your NSPersistentCloudKitContainer. NSPersistentCloudKitContainer typically manages a private zone. As I mentioned, the SharingProvider includes, and I encourage you to check out their implementations. Learn SwiftUI and take your iOS Development to the Next LevelSwiftUI Essentials iOS 16 Edition book is now available in Print ($39.99) and eBook ($29.99) editions. 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. There are two ways to share data via CloudKit: record sharing and zone sharing. Unlike iCloud, CloudKit does have the option to have public data available to anyone who uses the app. Xcode prefixes the container name with iCloud. In my example, I do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens. 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. Kodeco requires JavaScript. It brings together a huge amount of domain knowledge. Launching the CI/CD and R Collectives and community editing features for How to share Core Data between multiple users? Download the starter project by clicking the Download Materials button at the top or bottom of this tutorial. This new checkbox tells NSPersistentCloudKitContainer that the value for this attribute should be stored in the encryptedValues payload of the resulting CKRecord. If you sent the invitation from a real device, that can be a simulator. was to be able to accept share invitations. The values all conform to CKRecordValue, but these, in turn, are always one of a specific subset of familiar data types: NSString, NSNumber, NSDate, and so on. depending on whether or not they are the owner of those zones. 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. The CKShare object may also be configured with title and icon information to be included in the share link message. However, a limitation of this was that you couldnt easily share your data with other people to contribute to it. Download iOS 13.0+ iPadOS 13.0+ Xcode 13.0+ Mac Catalyst 13.0+ Overview As technology advances, people collaborate with others through cloud-based apps more than ever. So that's how we use NSPersistentCloudKitContainer. The consent submitted will only be used for data processing originating from this website. 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. Even in this humble sample application, I've had to make a number of changes to the user interface to present information about shared objects. Another user will see a different set of zones. And, as of iOS 10, a shared CKDatabase where user-controlled groups can share items among the members of the group. Manage Settings You could use the recordId for this. 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 It may be tempting to think that the above is a completely robust data sharing solution, but its not quite that simple. NSPersistentCloudKitContainer manages these zones. Notice the role and permission for each user. to present information about shared objects. This is achieved by a call to the preparationCompletionHandler method that was passed to the completion handler. Next, we'll take a deep dive into the mechanics of sharing. Stay active, close your rings, and have a great WWDC 2021. However, Apple strongly urges developers to use the operations rather than the convenience methods. In my brief demo, I showed an application that makes use of two CloudKit databases, the .private and the .shared database. Theres one minor bug with your app at the moment. Search for jobs related to Cloudkit share data between users or hire on the world's largest freelancing marketplace with 21m+ jobs. 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. provided by NSPersistentCloudKitContainer. These values are stored in a new payload on CKRecord called encryptedValues, introduced in the "What's New in CloudKit" session. Build and run. But our applications are usually designed, NSPersistentCloudKitContainer has to also help us make sense, of all of these objects so that we can build. So that's how we use NSPersistentCloudKitContainer to combine the .private and .shared databases, create shares for objects, and accept sharing invitations. For example, the zone that NSPersistentCloudKitContainer manages. CloudKit notifications arrive via the standard iOS notification mechanism. For the CloudKit functionality, Ive broken things into two classes: A lower level CloudKitNoteDatabase singleton and a higher level CloudKitNote class. A participant is any other iCloud account. Open CoreDataStack.swift. The last change I had to make was to be able to accept share invitations, which I do using this new method on NSPersistentCloudKitContainer: 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 directly to NSPersistentCloudKitContainer. This second step may be repeated in the case of a conflict. CloudKit prefixes your entities with CD to distinguish them from traditional CloudKit records. Then just create a deplink that includes that unique identifier. to store objects in a specific shared zone. Let's look at that change in a bit more detail. 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. It's been my pleasure to introduce just some of the changes we've made to NSPersistentCloudKitContainer to support sharing. In this challenge, update the code so this data deletes from the second device when a post is no longer shared with others. Ask with tag wwdc21-10015, Optimize your use of Core Data and CloudKit, Bring Core Data concurrency to Swift and SwiftUI, There and back again: Data transfer on Apple Watch, Build apps that share data through CloudKit and Core Data. For iOS and macOS, Apple provides a robust toolkit, called CloudKit API, which allows developers targeting Apple platforms to solve this synchronization problem. They build on Apples notification infrastructure to allow various clients to get push notifications when certain CloudKit changes occur. And I'd like to show you one specific call site. At the moment, when you launch the app, entries in your journal all look the same. Making statements based on opinion; back them up with references or personal experience. 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. for the view controller, completing the injection. Join our team. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. I needed a way to ensure they all work correctly. Participants can have different roles and permissions. To edit or update the caption or description, tap the destination cell to see the detail screen. - Accepting a shared note will now move it to the top level of your notes folder - Fixed a bug where clicking on the month name on macOS shifted the calendar weeks - Improved website titles when pasting a web link in NotePlan - iCloud Drive sync is now hidden as a sync option for new users since Cloudkit provides a better sync experience Maybe, if you define some format for downloading a single record outside of its data store. about the CKShare a specific post resides in. Finally, I invoke UICloudSharingController's completion block with the results provided by NSPersistentCloudKitContainer, which tells it I'm ready to continue the sharing flow. The exact version of the record you tried to save. I might need to know whether or not an object is shared. by the presence of their objectID in this set. Sets the title of the share, using the caption of the. 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. This framework (https://github.com/iRareMedia/iCloudDocumentSync) was released before CloudKit and supports an easy way of sharing: You get a URL that you can send to another user and he can directly download what you shared with him. Users may not be signed in, they may have disabled CloudKit for the app, they may be in airplane modethe list of exceptions goes on. For this example, youll use CKAsset to store the note text. 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. this new Allows Cloud Encryption checkbox. we have built in to NSPersistentCloudKitContainer. The following code, for example, creates a CKShare object containing the record to be shared and configured for read-only access: Once the share has been created, it is saved to the private database using a CKModifyRecordsOperation object. informative user interfaces for our users. manages objects in two CloudKit databases. 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. Clash between mismath's \C and babel with russian. 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. Learn to share data between CoreData and CloudKit in a SwiftUI app. First off, you need to make sure youre starting from a valid CKRecord. Once set up, operations are passed to the CKDatabase object, where theyll be executed on a background thread. and a shared zone that they own in their .private database. Sharing CloudKit Data with Other iCloud Users Create and share private CloudKit data with other users by implementing the sharing UI. Why was the nose gear of Concorde located so far aft? In the Signing & Capabilities section, add the iCloud capability. When and how was it discovered that Jupiter and Saturn are made out of gas? This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. 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. You need to add a sheet modifier to the preparationCompletionHandler is called, it must be passed share..., logged into a second iCloud account you have a great WWDC 2021 to present CloudSharingView once set,. 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That actually owns an object shared with others SQLite-backed stores, Core data in iCloud iOS! Icloud APIs a short wait, the SharingProvider includes, and handle remote notifications of updates to your account...