error trying to access core data - ios

Question

I am trying to get the values I have saved in one of my core data objects, however I keep getting this error
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name 'Man''
The resulted error is occurring from the code I have written that tries to access the core data object then logg its content, as show shown below.
if ([manufDBVNumber isEqualToNumber:currentDBVersion]) {
// READ FROM CORE DATA
// WRITE TO CORE DATA
NSManagedObjectContext *context = [self managedObjectContext];
NSLog(#"%#", context);
// Test listing all FailedBankInfos from the store
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Man" inManagedObjectContext:self.managedObjectContext]; // This is where the error is happening.
[fetchRequest setEntity:entity];
NSError *error;
NSMutableArray *manufacturerDictionaryArray = [[NSMutableArray alloc] init];
NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
for (Manuf *manuf in fetchedObjects) {
NSLog(#"MANA: %#", man.mana);
NSLog(#"SURGE: %#", man.surge);
NSLog(#"HEALTH: %#", manuf.health);
etc//....
This is how I have synthesized the managedObjectContext and fetchedResultsController
// Core-Data variables used for fetching and managing the object
#synthesize fetchedResultsController = __fetchedResultsController;
#synthesize managedObjectContext = __managedObjectContext;
Any help would be greatly appreciated.

Answer 1

You do this:
NSManagedObjectContext *context = [self managedObjectContext];
But then you access this:
self.managedObjectContext
Assuming your NSLog(#"%#", context); shows a valid NSManagedObjectContext, then I would do this:
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Man" inManagedObjectContext:context];
Or, change your original declaration to:
self.managedObjectContext = [self managedObjectContext];

Answer 2

In your viewController.m implementation file, right under this bit of code:
- (void)viewDidLoad
{
add this bit of code:
id delegate = [[UIApplication sharedApplication] delegate];
self.managedObjectContext = [delegate managedObjectContext];