How to use Core Data without Storyboards?

How to use Core Data without Storyboards?

I am trying to use Core Data without storyboarding in my app. I want to
manage many relationships and I have a kind of singleton class to manage
the access to the managedObjectContext, model, and
persistentStoreCordinator I got it from this link Singleton datalayer
without appdelegate
My problem is that I dont want to use StoryBoards but all the examples
that I found use Storyboards. I have problems with UITableView because
appDelegate doesnot found it.
I want to create a Single Application and then with a singleton to manage
the context and everything, show the objects that I get in a JSON format
with nsfetchedresultcontroller or with fetchrequests if I only need one
item.