Loading with NSOperation instead

async_loading.m

- (id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder])) {
        [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
        // Load the data
        NSOperationQueue *queue = [[NSOperationQueue alloc] init];
        NSOperationQueue *main = [NSOperationQueue mainQueue];
        NSBlockOperation *fetchStreamOperation = [[NSBlockOperation alloc] init];
        [fetchStreamOperation addExecutionBlock:^{
            NSLog(@"Getting data");
            NSURL *publicTimeline = [NSURL URLWithString:@"https://api.twitter.com/1/statuses/public_timeline.json"];
            NSError *error = nil;
            NSData *tweetData = [NSData dataWithContentsOfURL:publicTimeline options:0 error:&error];
            _tweets = [[tweetData objectFromJSONData] retain];
            [main addOperationWithBlock:^{
                [self.tableView reloadData];
                [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
            }];
            //[self performSelectorOnMainThread:@selector(reloadData:) withObject:tweets waitUntilDone:NO];
        }];
        [queue addOperation:fetchStreamOperation];
        [queue release];

        self.title = @"Tweetoramah";
    }

    return self;
}