SwiftUI Cookbook - Third Edition

14

Persistence in SwiftUI with Core Data and SwiftData

Core Data is one of the most essential Apple frameworks in the iOS and macOS ecosystem. Core Data provides persistence, which means it can save data outside the app’s memory, and the data you save can be retrieved after you restart your app. Given its importance, it’s not a surprise that Apple has implemented some extensions for Core Data to make it work nicely with SwiftUI. In Core Data language, a stored object is an instance of NSManagedObject, which conforms to the ObservableObject protocol so that it can be observed directly by a SwiftUI view. Also, NSManagedObjectContext is injected into the environment of the view hierarchy so that SwiftUI views can access it to read and change its ...