Code example of how I get a MOC, set entity attributes, and save MOC: let newCategory = Category(context: CoreDataStack.getContext()) newCategory.attribute1 = textField.text! newCategory.attribute2 = true CoreDataStack.saveContext() getContext() simply returns a persistentContainer.viewContext and saveContext() is a basic: if context.hasChanges { 						do { 								try context.save() 								 						} catch let error as NSError { 								let nserror = error as NSError 								fatalError("Unresolved error when saving MOC: \(nserror), \(nserror.userInfo)")								 						} }