Reachability for iOS5.x with ARC, sample usage using tonymillion fork

ReachabilityExample.m

#pragma mark - Reachability

/**
* This kicks off a check for our website's reachability in the context of needing it to display, or alert the user
* of error, just once. That's why we stop the notifier in both reachable and unreachable callback block handlers.
* We're not looking for ongoing callbacks through the life of the application; we just want to know the one time.
*
* This is meant for an iPhone app only, hence, no explicit WWAN setting.
*
* CREDIT
*   The iOS5 ARC compatible adjusted Reachability class from Tony Million was used.
*   See: https://github.com/tonymillion/Reachability
*   Be sure to see Tony's associated iOS5 ARC Project in this repository. The README didn't call out the
*   need for dispatch_async back on the main thread, or stopping the notifier, but this can be gleaned
*   from the embedded sample project. I've put that together in this method, for what I think would be a
*   common use case.
*/
- (void)checkWebsiteReachability {
    // Allocate a reachability object
    Reachability *websiteReachability = [Reachability reachabilityWithHostname:kRPWebsite_REPSPRO];

    RPSettingsWebsiteViewController *capturedSelf = self;

    // Set the blocks for both reachable and not-reachable. These callbacks are on background threads,
    // so we must dispatch_async back on the main thread before continuing with success/failure actions
    // that impact the UI.
    websiteReachability.reachableBlock = ^(Reachability *reachability) {
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Website was reachable. So loading it now.");
            [capturedSelf loadWebsite];
        });
        [reachability stopNotifier]; // Don't need it anymore, so stop it from alerting us ongoing.
    };

    websiteReachability.unreachableBlock = ^(Reachability *reachability) {
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Website was NOT reachable. Alerting user of this, now.");
            [capturedSelf presentSimpleAlertWithTitle:@"REPS Pro Website"
                                           andMessage:@"The website cannot be loaded at this time, as a reliable "
                                                              "Internet connection couldn't be established."];
        });
        [reachability stopNotifier]; // Don't need it anymore, so stop it from alerting us ongoing.
    };

    // Start the notifier which will cause the reachability object to retain itself.
    // This is the only way to get it to start checking network reachability.
    [websiteReachability startNotifier];
}