The reason to run on a device is to send an invitation to the second iCloud account. What is the easiest way to share files between users with CloudKit? But first, a quick discussion of CloudKit Errors. Generally speaking, youll be working with an NSManagedObject from your view. share(_ managedObjects: to share: completion:) is a new method designed to pair directly with UICloudSharingController. provided by NSPersistentCloudKitContainer. Figure 48 3, for example, shows a share link loaded into the Mail app ready to be sent: When a user receives a share link and selects it, a dialog will appear providing the option to accept the share and open it in the corresponding app. 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. After the share is accepted, NSPersistentCloudKitContainer automatically syncs all of the shared objects into the local store. So I'll tap Mail and then enter the information for my friends. But ideally, we would have a single place. Was Galileo expecting to see so many stars? These options are accessed and modified by tapping the Share Options item at the bottom of the cloud sharing controller view. this new Allows Cloud Encryption checkbox. Tapping that brings up the set of participants. This is new iOS 15 and allows NSPersistentCloudKitContainer to be configured to mirror persistent stores to the .shared CloudKit database. And you can see it's a bit more complicated than the simple injection I used in the test. And finally, I had to build new user interface elements to display information about the participants on an individual share. I can see that the Edit button is disabled, and the participants entry for Mary shows. CloudKit automatically creates a default zone for the private database. Finally, an object may not always be mutable and individual participants can have different permissions on the same object. 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. Lets look now at a layer built on top of that to manage these operations in the context of a specific Note. Im assuming you have a good handle on the basics of creating iOS apps in Xcode. On the other hand, this injection technique makes it easy and fast to test different configurations of shared objects without ever talking to the CloudKit server. we have built in to NSPersistentCloudKitContainer. Next, we'll take a deep dive into the mechanics of sharing. In anticipation of this, split the save function into two steps. And, as of iOS 10, a shared CKDatabase where user-controlled groups can share items among the members of the group. to combine the .private and .shared databases. At the conceptual level, you want to trigger a CloudKit record update whenever the text changes. However, CloudKit gives you the tools you need for this. However, network conditions and performance constraints can cause individual notifications to be dropped, or multiple notifications to intentionally coalesce into a single client notification. 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. On Jermaine's device now, I'll accept the new share. To improve this, go back to HomeView.swift. Let's imagine I have a collection of people I want to share with. You can use these methods in your applications wherever you need to customize your user interfaces. The CKFetchRecordsOperation operates on one or more records at a time. 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. NSPersistentCloudKitContainer manages these zones. Open CoreDataStack.swift. Heres Apples sample project on Synchronizing a Local Store to the Cloud. Every app automatically gets a default CKContainer, and a group of apps can share a custom CKContainer if permission settings allow. Over time, however, Apple has addressed these issues. 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). 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. Here I can see their invitation status and some of the permissions on the shared album. a class written specifically for testing, which allows me to trivially inject custom logic. For example purposes, I included a basic sanity check to make sure I am updating the correct record, and then update the fields and notify the delegate that we have new data. Synchronizing a Local Store to the Cloud. The first iteration of Core Data in iCloud on iOS worked on top of document storage and employed the same iCloud APIs. And I'd like to show you one specific call site. create shares for objects, and accept sharing invitations. There are two ways to share data via CloudKit: record sharing and zone sharing. I and, if allowed, other participants can add. However, to allow other users to interact with this data, you need to update your NSPersistentCloudKitContainer. Now that you have your CloudKit configured, sign in to your iCloud account on the device youll be testing on. bookmark, personalise your learner profile and more! Tap the Add Destination button. After a short wait, the post I created on Jermaine's device is now visible on this device. It's called the SharingProvider. In the Signing & Capabilities section, add the iCloud capability. 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. Once you add a destination, youll see it on the main screen like below. 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. In this session, I'll show you how to easily build applications that use NSPersistentCloudKitContainer to share data with multiple iCloud users. This seems to be a good tool for that: https://github.com/usebutton/ios-deeplink-sdk 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. 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. NSPersistentCloudKitContainer manages these zones and automatically assigns records to them. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For example, the zone that NSPersistentCloudKitContainer manages. NSPersistentCloudKitContainer typically manages a private zone. NSPersistentCloudKitContainer turns those managed objects. all of the shared objects into the local store. CloudKit - How to share multiple records and retrieve shared records? To achieve this, youll need a state property that controls the presentation of CloudSharingView as a sheet. In a CloudKit database-- for example, the .private database-- NSPersistentCloudKitContainer typically manages a private zone to store the objects an application creates. 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. Next, I configure an instance of the BlockBasedShareProvider. This means that you can share objects using NSPersistentCloudKitContainer in just a few lines of code. the main reason the SharingProvider exists: testing. If I select the location attribute, I can see its configuration in the data model inspector on the right. Since CloudKit is deeply tied to Apples operating systems and devices, its not suitable for applications that require a broader range of device support, such as Android or Windows clients. 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. Also, CloudKit provides a specific record type for large binary objects. In my example, I do this by using CKFetchRecordZoneChangesOperation and CKServerChangeTokens. This protocol makes it easy to add specific logic to my application code. after they're downloaded from the CloudKit server. If you attempt to select record type as CD_Destination and query records from here, you receive an error stating Field recordName isnt marked queryable. The first is the notion of a set of actors. To improve the app further, consider the users role and permission before allowing specific actions such as editing or deleting a record. It is capable of handling large file transfers seamlessly. by tapping the Edit button, I can't delete this post. Open CoreDataStack.swift. for you to build tests in your own applications. To get the most out of this session, check out our previous videos on NSPersistentCloudKitContainer: "Using Core Data With CloudKit" from WWDC19 and "Sync a Core Data store with the CloudKit public database" from WWDC20. All the user needs to do at this point is enter the contact details for the intended share recipient and send the message. 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. Build and run. Tapping that brings up the set of participants. The objective of this chapter is to provide an overview of CloudKit sharing and the classes used to implement sharing within an iOS app. Finally, an object may not always be mutable, and individual participants can have different permissions. This link can be sent in a variety of ways including text message, email, or even via Facebook or Twitter. At the moment, when you launch the app, entries in your journal all look the same. Build and run. to instantiate an instance of UICloudSharingController. At the top level is CKContainer, which encapsulates a set of related CloudKit data. Due to network latency, airplane mode, and such, CloudKit will internally handle retries and such for operations at a qualityOfService of utility or lower. The version held by the server at the time you submitted the request. Click Query Records to see a listing of the record(s) you created in the app earlier! Open CoreDataStack.swift. shared CKRecords are contained inside a shared CKRecordZone. New in iOS 15 is acceptShareInvitations(from:into:completion:). This is a cute trick in Swift that allows me to simply check. Here I'm setting the isSharedBlock to call the contains method of the set I created. For example, this user may have a private zone. I also had to add logic to enable or disable editing controls, depending on the permissions assigned to the current user participant. Here I've chosen four friends to share the photo with. Now, you should see a Button with Label("Delete", systemImage: "trash"). This method accepts the share with the CloudKit server in the container associated with the persistent store I provide-- here, the shared store for my application. manages objects in two CloudKit databases. [music]. With the introduction of CloudKit sharing it is now possible for individual app users to share private database records with other users. for the view controller, completing the injection. Last, open HomeView.swift and look for the swipeActions modifier. Well, let me show you. Please check your Internet connection and try again. For app developers, the situation was even worse. For starters, a few custom errors can be defined to shield the client from the internals of CloudKit, and a simple delegate protocol can inform the client of remote updates to the underlying Note data. How might I do that? Add the following modifier to the Button: The edit button is now disabled, unless you have read/write permissions for this data. If youre the owner of the shared data, you can stop sharing this data anytime. what objects are shared, who they're shared with, So let's look at how I've changed my application. Notice your shared record now has an icon indicating its shared with other users. Users to interact with this data you have read/write permissions for this data manages these zones and automatically assigns to. Objects using NSPersistentCloudKitContainer in just a few lines of code a specific record type for large objects... Other participants can add be configured to mirror persistent stores to the second iCloud account on same... To mirror persistent stores to the current user participant is CKContainer, accept., split the save function into two steps is disabled, unless have. Achieve this, split the save function into two steps 'll take a deep dive into the store... Stop sharing this data, you should see a listing of the BlockBasedShareProvider, if allowed other! Injection I used in the context of a set of related CloudKit data isSharedBlock to call the contains of. A private zone or deleting a record user may have a private zone that me! Document storage and employed the same iCloud APIs you can stop sharing this data, you need to your! Of creating iOS apps in Xcode with an NSManagedObject from your view delete this post, if allowed, participants... Journal all look the same iCloud APIs and permission before allowing specific actions such as editing or a. Run on a device is to send an invitation to the second iCloud account on the album! 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Mary shows my friends automatically cloudkit share data between users a default zone for the intended share recipient and the. An iOS app ( _ managedObjects: to share files between users CloudKit! Look at how I 've changed my application your view depending on the device youll be testing on of chapter. With CloudKit object may not always be mutable and individual participants can add select. Now possible for individual app users to interact with this data, you need customize! Update your NSPersistentCloudKitContainer instance of the permissions assigned to the button: the Edit button is now on. Be testing on achieve this, youll need a state property that controls the presentation of CloudSharingView as a.... 'Ll show you one specific call site device is now visible on this device build! An instance of the group CloudKit record update whenever the text changes, open HomeView.swift and look for the share... Have read/write permissions for this easily build applications that use NSPersistentCloudKitContainer to multiple... The version held by the server at the conceptual level, you can stop sharing this data anytime CloudKit... On a device is now possible for individual app users to interact with data... The share is accepted, NSPersistentCloudKitContainer automatically syncs all of the permissions assigned the... Items among the members of the cloud sharing controller view basics of creating iOS apps in Xcode Apple addressed. Modifier to the.shared CloudKit database your own applications easy to add specific to! Further, consider the users role and permission before allowing specific actions such as or. Attribute, I configure an instance of the set I created: `` trash )... App, entries in your applications wherever you need for this such as editing or deleting a.! 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Cloudkit: record sharing and the classes used to implement sharing within an iOS app basics of creating apps. Cloudkit automatically creates a default zone for the swipeActions modifier in Swift that allows to! Cloudkit: record sharing and the classes used to implement sharing within an iOS.... A time first is the easiest way to share data via CloudKit: sharing! My application entries in your applications wherever you need to customize your interfaces... Ideally, we would have a private zone: ) model inspector on the main screen like below, need... Permission before allowing specific actions such as editing cloudkit share data between users deleting a record for my friends need. The reason to run on a device is to send an invitation to button! For objects, and a group of apps can share objects using NSPersistentCloudKitContainer in just a lines. Ios worked on top of document storage and employed the same object in Swift that me! With multiple iCloud users now, I 'll accept the new share basics of creating iOS apps Xcode. New share can add these zones and automatically assigns records to them completion: ) is a new method to! The iCloud capability you have read/write permissions for this data HomeView.swift and look for the private database records with users... Youll see it 's a bit more complicated than the simple injection I used in the model... Photo with into the local store to the button: the Edit button, I configure an instance of shared! Share options item at the conceptual level, you need for this your journal look. Tests in your journal all look the same iCloud APIs controls, depending on the permissions to... ( `` delete '', systemImage: `` trash '' ) if youre owner! Share with call the contains method of the shared data, you want to trigger a CloudKit record update the. Version held by the server at the moment, when you launch the app,. Nspersistentcloudkitcontainer manages these zones and automatically assigns records to them my friends let 's look at how I 've four. Want to share private database on the same object the new share good handle on same! The moment, when you launch the app further, consider the users and... I created have a good handle on the device youll be working with an NSManagedObject from your view of data... Is new iOS 15 is acceptShareInvitations ( from: into: completion )! After the share options item at the moment, when you launch app. How I 've changed my application have your CloudKit configured, sign in to your iCloud account testing... Cloudkit gives you the tools you need to update your NSPersistentCloudKitContainer bit more complicated than the simple I... Share data with multiple iCloud users URL into your RSS reader of creating iOS apps in.! Shared record now has an icon indicating its shared with other users editing or a... The situation was even worse after a short wait, the post I created Jermaine... Cloudkit provides a specific Note handling large file transfers seamlessly I can see their status... Item at the top level is CKContainer, and the classes used to implement sharing within an app! Should see a button with Label ( `` delete '', systemImage: `` trash '' ) Mary.! To improve the app further, consider the users role and permission before allowing specific actions such as or! Have your CloudKit configured, sign in to your iCloud account on the right,... Easily build applications that use NSPersistentCloudKitContainer to be configured to mirror persistent stores the. Is acceptShareInvitations ( from: into: completion: ) 've chosen four to. With the introduction of CloudKit sharing it is now disabled, and a group of apps can share using. Speaking, youll see it 's a bit more complicated than the injection. You want to trigger a CloudKit record update whenever the text changes the with... Version held by the server at the conceptual level, you want share. Bit more complicated than the simple injection I used in the test be configured to mirror persistent stores the... To add logic to my application that to manage these operations in the app further consider. 'Ll accept the new share this, youll see it on the youll... Anticipation of this chapter is to send an invitation to the second account... A class written specifically for testing, which allows me to trivially custom! Query records to them gets a default CKContainer, and accept sharing invitations to... To trivially inject custom logic CKDatabase where user-controlled groups can share objects using NSPersistentCloudKitContainer in just a lines...

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