Strange behavior in deleting core data contents - ios

Question

I use the following code to delete the coredata DB contents... I get the notification properly..But it seems the data are not deleted... I can't figure it out...
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:entityDescription inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
NSError *errors;
NSArray *items = [self.managedObjectContext executeFetchRequest:fetchRequest error:&errors];
NSLog(#"FinalArray:%#",[finalArray objectAtIndex:currentImageIndex]);
NSManagedObject *managedObject=[finalArray objectAtIndex:currentImageIndex];
NSLog(#"NSManagedObject:%#",managedObject);
for (int i=0;i<[items count];i++)
{
if ([managedObject isEqual:[items objectAtIndex:i]])
{
[self.managedObjectContext deleteObject:managedObject];
NSLog(#"gone");
}
}
NSNotificationCenter *nc=[NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(deleteCheck:) name:NSManagedObjectContextObjectsDidChangeNotification object:self.managedObjectContext];
NSLog(#"dffsdf%#",[errors description]);
if (self.managedObjectContext==nil)
{
NSLog(#"deleted");
}
Notification Func call
- (void)deleteCheck:(NSNotification *)notification
{
NSLog(#"CoreData got Deleted");
NSDictionary *userInfoDictionary = [notification userInfo];
NSSet *deletedObjects = [userInfoDictionary objectForKey:NSDeletedObjectsKey];
NSLog(#"DeletedObjects%#",deletedObjects);
}
Since NSManagedObjectContextObjectsDidChangeNotification notification called for each time when I tap the delete button... But no effects in DB... Suggestions Please

Answer 1

You need to save at the end.
NSError *error = nil;
[self.managedObjectContext save:&error];

Answer 2

You can use this simple delete method that i use, its work perfect :
-(void)deleteRecords{
NSFetchRequest * deleteRequest = [[[NSFetchRequest alloc] init] autorelease];
[deleteRequest setEntity:[NSEntityDescription entityForName:#"yourTabelName" inManagedObjectContext:context]];
[deleteRequest setIncludesPropertyValues:NO]; //only fetch the managedObjectID
NSError * error = nil;
NSArray * cars = [context executeFetchRequest:deleteRequest error:&error];
if ([cars count] !=0) {
//error handling goes here
for (NSManagedObject * car in cars) {
[context deleteObject:car];
}
NSError *saveError = nil;
[context save:&saveError];
// [tableView reloadData];
}
else {
NSLog(#"No Data To delete");
} }