Core Data - Order of objects in a to-many relationship

Question

My app is a music library app, the user has their songs, and they can create playlists.
I want the order of the songs in the playlist to be in the order that the user adds those songs to that playlist.

My core data objects:

Song
=====
name
duration
album

artist (to one relationship)

Playlist
========
title

songs (to many relationship)  

I have a tableview of playlists, each row in that table shows the title of the playlist and the name of the last song added to that playlist.

I have two questions:

1. How can i know what was the last song the user added to the playlist? even more how can I know the order of the songs in a given playlist?
2. How should I fetch that last song name when i'm building the playlists tableview?

Answer 1

Set the relationship type to ordered in the core data editor. This will mean that you now get an NSOrderedSet of songs instead of just an NSSet of songs