How to check if the connection is available ( iphone )?

I used the following code to check this---

(the request is my request)

NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

if( theConnection )
{
    nslog(@"connection is present");

}
else
{-------error   message1-------------
}

and then in the delegates I relay on to receive response

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
-------error   message2-------------
}

I am presently checking everything on my simulator...and...detecting internet connection by just removing my internet cable...

but every time my program I got only message 2.....but it comes after 1 min(conne开发者_如何学Cction time over)...

but I want to check it in as minimum time as possible....

Use this method:

- (BOOL) connectedToNetwork
{
 // Create zero addy
 struct sockaddr_in zeroAddress;
 bzero(&zeroAddress, sizeof(zeroAddress));
 zeroAddress.sin_len = sizeof(zeroAddress);
 zeroAddress.sin_family = AF_INET;

 // Recover reachability flags
 SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
 SCNetworkReachabilityFlags flags;

 BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
 CFRelease(defaultRouteReachability);

 if (!didRetrieveFlags)
 {
     printf("Error. Could not recover network reachability flags\n");
     return 0;
 }

 BOOL isReachable = flags & kSCNetworkFlagsReachable;
 BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
 return (isReachable && !needsConnection) ? YES : NO;
}

You may want to take a look at the Reachability exaxmple provided by Apple.

If you want your NSURLConnection to fail earlier, you need to specify a timeout in your NSURLRequest: requestWithURL:cachePolicy:timeoutInterval: