I really have been just about everywhere, e.g., stack overflow.com and
iphonedevsdk.com and have really learned a lot … unfortunately, what I have
learned is that there are opposing opinions on how to best check for an active
internet connection with respect to effectiveness and speed. Such comments
such as "You're not testing for what you think you are!".
Considering my lack of success with Apple's Reachability Code, I have found
that the asynchronous call to:
NSString *urlString = @"myURL";
NSURL *theURL = [NSURL URLWithString:urlString];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL];
NSURLConnection *theConnection = [NSURLConnection
connectionWithRequest:theRequest delegate:self];
which does hook up with the delegate method:
- (void )connection:(NSURLConnection *)connection didFailWithError:(NSError
*)error
This magic does indeed work, but I could fry a couple of eggs while I'm waiting
and I know that the iApp folks will bounce me for that delay.
Maybe my method of "taking my connection" down may be in error -- I am simply
pushing off the "standby" button on my cable modem -- I have also just
unplugged the modem.
With respect to my attempts in using Apple's Reachability code:
Here are the two properties:
Reachability *itsInternetReachability;
BOOL itsInternetActive;
This method is called when I start my app:
- (void )startObserveInternetConnection
{
self.itsInternetReachability = [Reachability
reachabilityForInternetConnection];
NSNotificationCenter *notificationCenter = [NSNotificationCenter
defaultCenter];
[notificationCenter addObserver:self
selector:@selector(pingInternetConnection:)
name:kReachabilityChangedNotification
object:internetReachability_];
[internetReachability_ startNotifier];
}
- (void )pingInternetConnection:(NSNotification *)sentNotification
{
if ([[sentNotification object] isKindOfClass:[Reachability class]])
{
NetworkStatus internetStatus = [self.itsInternetReachability
currentReachabilityStatus];
self.itsInternetActive = (internetStatus != NotReachable);
}
else
{
self.itsInternetActive = NO;
}
}
Isn't the function of -startNotifier to enable the callback method to be
continuously called within the main RunLoop?
Yet the only time I can get this callback method to be called is if I call
NSNotificationCenter's -postNotificationName elsewhere in the code??
-[notificationCenter postNotificationName:kReachabilityChangedNotification
object:internetReachability_];
Triple thanks …
John Love
Touch the Future! Teach!
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