Receiving Error from NSDictionary reference after NSDate Implementation

Hello all,

I have followed the "BlogReader" project taught by Amit (Hi Amit!) Baljani since the first video. In a previous video, we were taught how to reference JSON data from the following URL

http://blog.teamtreehouse.com/api/get_recent_summary/

Using the following code:

NSURL *blogURL = [NSURL URLWithString:@"http://blog.teamtreehouse.com/api/get_recent_summary/"];
NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];
NSError *error = nil;

In other words, a NSURL variable is set with the JSON data from the URL using URLWithSTring. The JSON URL is stored in an NSData variable using dataWithContentsOfURL. I'm not sure how it works, but there is an error variable that is assigned to nil using NSError.

This all works with no problems. The table view is viewed as follows:

cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ %@", blogPost.author, blogPost.date];

However, after adding the following "date formatting" module to my BlogPost.h header file:

- (NSString *) formattedDate {
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSDate *tempDate = [dateFormatter dateFromString:self.date];

    [dateFormatter setDateFormat:@"EE MMM, dd"];
    return [dateFormatter stringFromDate:tempDate];
}

and then adding that formatted date variable to my table view:

cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ %@", blogPost.author, [blogPost formattedDate]];

I receive an error, which takes me to the following lines after inserting an exception breakpoint:

NSError *error = nil;

NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

Any ideas?

thanks