iOS: Delete ALL Core Data Swift
public func clearAllCoreData() {
let entities = self.persistentContainer.managedObjectModel.entities
entities.flatMap({ $0.name }).forEach(clearDeepObjectEntity)
}
private func clearDeepObjectEntity(_ entity: String) {
let context = self.persistentContainer.viewContext
let deleteFetch = NSFetchRequest<NSFetchRequestResult>(entityName: entity)
let deleteRequest = NSBatchDeleteRequest(fetchRequest: deleteFetch)
do {
try context.execute(deleteRequest)
try context.save()
} catch {
print ("There was an error")
}
}