Handling a NSURLRequest with timeout when using delegate

Question

I'm using a NSMutableURLRequest to connect to a web site to get a JSON response. I'm doing so by generating the request, and then using NSURLConnection with a delegate of self to handle the async connection. I've implemented all the normal delegate methods:

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
- (void)connectionDidFinishLoading:(NSURLConnection *)connection

All works perfectly with getting data back, dealing with any errors that occur, etc. However with the timeout on the NSURLRequest set to 10 seconds I don't seem to get called in those methods (I expected the didFailWithError to get called). It just sits there forever and I have no notification that it timed out.

Reading the iPhone API docs I don't see any mention of what should happen when the timeout occurs, just that you can set the timeout value. What should happen? I didn't see any other delegate methods in the API that would help. I don't have to manually check for timeouts, do I? Are timeouts only for synchronous requests?

Answer 1

Your timeout is received in this method:

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error