Trying to recall a CoreData stored entry on program start (iPhone)

Question

I have created a program which stores data in a database created using CoreData. I want to add the ability to for the user to close the app while editing in the modal view and be presented with the same entry and view on app relaunch.
So far, I have tried storing the various data from the modal view into NSUserDefaults, including the IndexPath of the entry, and recalling the IndexPath on launch. The IndexPath doesn't seem to get stored or restored properly.
[defaults setObject:indexPath forKey:@"IndexPath"];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSIndexPath *indexPath = (NSIndexPath *)[defaults objectForKey:@"IndexPath"];
Is there a better way to do this in general?

Answer 1

Did you register? For example (from one of my apps):
NSNumber *defaultArmDelay = [NSNumber numberWithFloat:5.0];
NSDictionary *resourceDict = [NSDictionary dictionaryWithObject:defaultArmDelay forKey:ArmingDelayKey];
[[NSUserDefaults standardUserDefaults] registerDefaults:resourceDict];