Determining if a request has timed out

Question

My code creates an NSMutableURLRequest, then uses a NSURLConnection to make a http request. I am combing the documentation but I cannot find how to determine if the request has timedout, i.e. I want to handle the timeout before the error is displayed
Here is my code:
NSData *serverData = [[NSData alloc] init];
NSString *theServerURL = @"http://myurl.com"
NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:theServerURL] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10.0];
[theRequest setHTTPMethod:@"POST"];
serverData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&serverResponse error:nil];
DO I somehow determine the timeout error based on the error in NSURLConnection? If so, how do error codes work? Is it somehow determined based on some variable in NSMutableURLRequest/NSURLRequest? Any help would be appreciated. Thank you.

Answer 1

Thats what I thought. I think I am screwing up the implementation as I am confused on the initialization properties. The initialization code from the doc is as follows:
NSError *myerror = [[NSError alloc] initWithDomain:domain code:code userInfo:dict
Then I think I would replace nil with myerror
I am struggling with what the domain, code, and userInfo properties. I think I want the error code NSURLErrorTimedOut but I have no idea how to get that.