Core Data in Swift

Integrating with the NSPersistentStoreCoordinator

The NSPersistentStoreCoordinator is the true maestro of Core Data. The NSPersistentStoreCoordinator is responsible for persisting, loading, and caching data. Think of the NSPersistentStoreCoordinator as the heart of Core Data. Having said this, we do very little work with the NSPersistentStoreCoordinator directly. We work with it upon initialization, but we almost never touch it again over the life of the application.

As part of our initialization, we perform two steps with the NSPersistentStoreCoordinator. First, we initialize it, which requires a valid NSManagedObjectModel. Once it’s initialized, we add one or more NSPersistentStore instances. An NSPersistentStore is a representation of a ...