How to retrieve stored reference to an NSManagedObject subclass?
- by DavidDev
Hi!
I have a NSManagedObject subclass named Tour. I stored the reference to it using this code:
prefs = [NSUserDefaults standardUserDefaults];
NSURL *myURL = [[myTour objectID] URIRepresentation];
NSData *uriData = [NSKeyedArchiver archivedDataWithRootObject:myURL];
[prefs setObject:uriData forKey:@"tour"];
Now I want to retrieve it. I tried using:
NSData *myData = [prefs objectForKey:@"tour"];
NSURL *myURL = [NSKeyedUnarchiver unarchiveObjectWithData:myData];
TourAppDelegate *appDelegate = (TourAppDelegate *)[[UIApplication sharedApplication] delegate];
NSManagedObjectID *myID = [appDelegate.persistentStoreCoordinator managedObjectIDForURIRepresentation:myURL];
if (myID)
{
Tour *tempObject = [appDelegate.managedObjectContext objectWithID:myID]; //WARNING
tour = tempObject;
}
if (tour) //instruction...
But it's giving me this warning "Incompatible Objective-c types. Initializing 'struct NSManagedObject *', expected 'struct Tour *'
Plus, when executing, it's giving me this: Terminating app due to uncaught exception 'NSObjectInaccessibleException', reason: 'CoreData could not fulfill a fault for '0x5001eb0
How can I solve this?
