Question

I am trying to utilize the NSNotificationCenter and for some reason the selector method is never called.

- (NewsItem *) loadNewsItemDetail:(NewsItem *)currentNewsItem
{
    self.newsItem = currentNewsItem;

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(DownloadNewsItem) name:@"connectionDidFinishLoadingComplete" object:nil];

    return self.newsItem;
}

- (void) DownloadNewsItem:(NSNotification *) notification
{
    NSString *urlString = [Configuration newsStreamAPIURL:plNewsAPIKey];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];

    (void)[[NSURLConnection alloc] initWithRequest:request delegate:self];
}


- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{       
    ...

    [[NSNotificationCenter defaultCenter] postNotificationName:@"connectionDidFinishLoadingComplete" object:nil];

}

Any reason why my DownloadNewsItem would never be called based on what I have provided?

Thanks!

Answer 1

You need a colon in your selector method, because it takes a parameter (an NSNotification in this case).

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(DownloadNewsItem:) name:@"connectionDidFinishLoadingComplete" object:nil];