IPhone : Fetching data from core data

I am using following code to fetch data from core database. But when I am pushing another view controller on current view and change some text on any text field and click cancel button without saving/updating text into DB.After clicking on cancel button I pop this view controller and then this method call again from viewDidApear method and then that edited text is come from following method. But I didn't save/update that text into database.

-(Notes *)fetchSpecificNoteWithNoteID:(NSString* )noteID 
    {

        NSEntityDescription *roomObj = [NSEntityDescription entityForName:@"Notes"
                                                   inManagedObjectContext:[[self appDelegate] managedObjectContext]];
        NSFetchRequest *request = [[NSFetchRequest alloc] init];
        NSError *error = nil;
        NSPredicate *predicate =[NSPredicate predicateWithFormat:@"notesID=%@",noteID];
        [request setPredicate:predicate];

        [request setEntity:roomObj];
        NSArray *array = [[[self appDelegate] managedObjectContext] executeFetchRequest:request error:&error];
        if ([array count] && array) {
            return [array objectAtIndex:0];
        }
        return nil;
    }