Core data persistent store coordinator isnt present

You should create a new project using Xcode's Master-Detail template, selecting "use Core Data" to get a current working example. Once you have a working project in front of you, search the project for NSPersistentStoreCoordinator - it is much easier to understand the docs in conjunction with a working code example than it is to understand them while trying to create working code from nothing.

You must have forgotten to add a persistent store. See the docs for how to create a persistent store.

After creating the persistent store, follow it up with a call like this:

NSPersistentStoreCoordinator *persistentStoreCoordinator = /* Assume this exists */;
NSURL *storeURL = /* ... */;

[persistentStoreCoordinator addPersistentStoreWithType: NSSQLiteStoreType
                                         configuration: nil
                                                   URL: storeURL
                                               options: nil
                                                 error: NULL];