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A notification center widget with shared core data. Example project for sharing data between iOS app extension and container app through shared core data.

Preview

Installation

Compatibility

iOS 10.3+
Xcode 8.0+

Usage

Create an app group

App Groups are the scheme iOS uses to allow different apps to share data. If the apps have the right entitlements and proper provisioning, they can access a shared directory outside of their normal iOS sandbox. To share data between widget extension and container app, select the target for your app and go to the capabilities tab. There, enable app groups. Repeat the same in the target of your widget extension

When you flip that switch, Xcode will talk to the developer center to configure your app ID for app groups. Next it'll ask you for a group name. Give it one and it'll create and download a new provisioning profile. Now, your app and its extension are ready to share the container, so it’s time to put the data in it.

Create your core data in shared container

Move SCDCoreDataWrapper.swift class, the .xcdatamodeled and NSManagedObject subclass to my SharedCode Framework.
Get the URL of the group container with containerURL(forSecurityApplicationGroupIdentifier: of FileManager passing the container identifier. You need to point to the security group as your store url so that they are both being stored to that.

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