Core Data: how to just delete and rebuild the data store?

Question

I\'m using Core Data in an iOS 7+ app that does not need to save user\'s data, all data the app needs is requested to services and it can be recovered at any time.

Answer 1

Working Swift solution if you target iOS 9 or higher

The shared CoreData manager:

class CoreDataContext {
    static let datamodelName = "CoreDataTests"
    static let storeType = "sqlite"

    static let persistentContainer = NSPersistentContainer(name: datamodelName)
    private static let url: URL = {
        let url = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0].appendingPathComponent("\(datamodelName).\(storeType)")

        assert(FileManager.default.fileExists(atPath: url.path))

        return url
    }()

    static func loadStores() {
        persistentContainer.loadPersistentStores(completionHandler: { (nsPersistentStoreDescription, error) in
            guard let error = error else {
                return
            }
            fatalError(error.localizedDescription)
        })
    }

    static func deleteAndRebuild() {
        try! persistentContainer.persistentStoreCoordinator.destroyPersistentStore(at: url, ofType: storeType, options: nil)

        loadStores()
    }
}

call loadStores only once in the appDelegate and deleteAndRebuild when you want to delete and rebuild the database :)