Migrate Objective-C Core Data to Swift Persistent Container

Question

When Apple added the new PersistentContainer class, they changed the location of the data stores. That means that if you add a new PersistentContainer, it won't pick up the current database but create one. The underlying issue is that the new store is inside another folder. How can I specify the folder for a PersistentContainer so that it picks up the old store?

Answer 1

The persistent store(s) of a NSPersistentContainer are specified in its persistentStoreDescriptions array property. By default, it contains one persistent store of type SQLite, backed by a file in the Application Support folder of your app's container.

The procedure to change this is explained in the Discussion section of the documentation of this property .

The path to the file of this store is specified in the url property of the that NSPersistentStoreDescription , which is mutable. So you should set the url property of that single NSPersistentStoreDescription in that array to your desired path.