Is it possible to implement Persistent History Tracking in an application/framework written in Objective C where Core Data stack has been setup manually in legacy manner? Or does persistent history tracking work only when persistent store was initialised by NSPersistentContainer available from iOS 10 onwards?

I am looking for a way to get ranges of all occurrences of a string in a larger string in Core data.

I am saving a transaction to a budget and I am trying to fire the didChangeObject delegate function when a new transaction is saved. For delete operation, it is getting called but not for insert.