VDUBStep is a lightweight framework that wraps Core Data's NSManagedObjectModel, NSPersistentStoreCoordinator and NSManagedObjectContext into a utility class, VDUBStore.

Set up in AppDelegate.m:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{
  NSURL *documentsURL = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory 
  	                                                            inDomains:NSUserDomainMask] lastObject];
  NSURL *storeURL = [documentsURL URLByAppendingPathComponent:@"vdub.sqlite"];
  [[VDUBStore sharedInstance] setupCoreDataStackWithURL:storeURL];
  
  return YES;
}

The framework also provides convenience methods for NSManagedObject and NSManagedObjectContext.

Create an instance of MyManagedObject:

MyManagedObject *mmo = [MyManagedObject createInContext:[VDUBStore mainContext]]]];
mmo.uniqueID = @1;
mmo.name = @"A Name";
[[VDUBStore mainContext] save];

Get a MyManagedObject by ID:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"uniqueID = %d", 1];
MyManagedObject *mmo = [MyManagedObject findFirstWithPredicate:predicate inContext:[VDUBStore mainContext]];
mmo.name = @"Another name";
[[VDUBStore mainContext] save];

Get array of all MyManagedObjects sorted by name:

NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name" 
                                                                 ascending:YES];
NSArray *mmos = [MyManagedObject findAllWithSortDescriptors:@[ sortDescriptor ] 
                                                  inContext:[VDUBStore mainContext]];

Delete an instance of MyManagedObject:

[mmo delete];
[[VDUBStore mainContext] save];

It is currently assumed that your NSManagedObjects implement entityName, such as is provided when they are generated by mogenerator.