Like AsyncStorage, but syncs with Apple's CloudKit

npm install react-native-cloudkit-storage

import CloudKitStorage from 'react-native-cloudkit-storage';

// Must call this!
CloudKitStorage.registerForPushUpdates();

await CloudKitStorage.setItem('itemName', JSON.stringify({ key: 'value' }));
const json = JSON.parse(await CloudKitStorage.getItem('itemName'));

// Handle remote events
CloudKitStorage.addListener('delete', ({ key }) => {
  console.log(`Deleted item ${key}`);
});
// Remote events only - not called when calling setItem
CloudKitStorage.addListener('change', ({ key, value }) => {
  console.log(`Changed item ${key}`, value);
});

Open XCode.

Click the top item in the files list (your project). In the Signing & Capabilities tab, click + Capability, then iCloud.

Scroll down to the iCloud section, then click the CloudKit. It may ask you to set your team.

Under containers, click the + button. Pick a name in the form iCloud.org.{team name}.{project name}. Ensure it is checked.

It can take a day or so for the CloudKit database to fully set up. If you're having issues, wait a few days, and check again.

Open the iCloud developer dashboard and do the following:

1. Create a zone called RCTCloudKitStorage
2. Create a record type called RCTCloudKitRecordType with a field called contents of type ASSET

Next, open AppDelegate.m and add the following,

#import "RCTCloudKitStorage.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  // ...
  [application registerForRemoteNotifications];
  // ...
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
  BOOL didHandle = [RCTCloudKitStorage
                    didReceiveRemoteNotification:userInfo
                    fetchCompletionHandler:completionHandler];

  if (!didHandle) {
    completionHandler(UIBackgroundFetchResultNoData);
  }
}

If you're targeting macOS via Catalyst, the default React Native setup has a bug in it where the app will open itself whenever the CloudKit database changes. To fix this, you'll need to be very comfortable with iOS development, but the following steps should help.

• Remove the React-Native logic from AppDelegate.m and implement it in your own UIViewController
• Add/keep @property (nonatomic, strong) UIWindow *window; in your app delegate
• Your view controller must conform to RCTBridgeDelegate
• Implement - (void)loadView and initialize self.view with an instance of RCTRootView
• Add a Main.storyboard, and point it to your new view controller. You don't need to set a view subclass

See the contributing guide to learn how to contribute to the repository and the development workflow.

MIT