JSON trial and error

gistfile1.m

- (void) getJSON {
    
    // Create the request.
    NSURLRequest *urlRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.zeroeightysix.com/Logovision/jsonhotspotting.json"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

        //Create queue
        NSOperationQueue *queue = [[NSOperationQueue alloc] init];

        // JSON as a NSData object
        [NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
        {
            [self parseJSONFromData:data];
        }];
}

- (void)parseJSONFromData:(NSData *)data {

    NSError* error;
    
    //create array with data
    NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
    
    if (!jsonArray) {
        NSLog(@"Error parsing JSON: %@", error);
    }

    //Parse the data into an array: thisArray[NSDictionary][NSArray]
    [jsonArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){

    }];
    
    //Creates a dictionary with jsonArray[0]
    NSDictionary *fileInfo = [jsonArray objectAtIndex:0];
    NSString *filename = [fileInfo objectForKey:@"filename"];
    NSLog(@"%@", filename);//prints "jamesbond.mp4"
    
    //Create an array with jsonArray[1]
    NSArray *dataArray = [jsonArray objectAtIndex:1];
    
    //Create a dictionary that contains n hotspot objects
    NSDictionary *hotspotItem = [dataArray objectAtIndex:1];
    NSArray *itemName = [hotspotItem objectForKey:@"hotspots"];
    
    //Create dictionary from itemName[0] to access individual hotspot data item
    NSDictionary *hotspotItemData = [itemName objectAtIndex:0];
    NSLog(@"%@", [hotspotItemData objectForKey:@"height"]); //prints "144"
}