Question

When my app launches, I check for reachability because I need an immediate internet connection. My problem, though, is that it appears there’s no immediate confirmation for the NetworkStatus, which means right after the Reachability is setup, I check whether there’s a connection, and it returns that there isn’t, regardless of whether I am in fact on WiFi/3G, or have turned the radio off.

I can confirm that I am in fact getting an Internet connection, because instantly after applicationDidFinishLaunching, there’s a notification which then logs “ReachableViaWiFi”..

What am I doing wrong? Why is it not confirming a valid Internet connection right away?

- (void)applicationDidFinishLaunching:(UIApplication *)application {    
    NetworkStatus netStatus = [hostReach currentReachabilityStatus];
    if (netStatus == NotReachable) {
        ErrorViewController *errorViewController = [[ErrorViewController alloc] initWithNibName:@"ErrorView" bundle:[NSBundle mainBundle]];
        [tabBarController.view removeFromSuperview];
        [window addSubview:[errorViewController view]];
        return;
    }
}

-(void)setupReachability {
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name:kReachabilityChangedNotification object: nil];
    hostReach = [[Reachability reachabilityWithHostName:@"www.google.com"] retain];
    [hostReach startNotifier];
}

-(void)reachabilityChanged:(NSNotification *)notification {
    Reachability* curReach = [notification object];
    NSParameterAssert([curReach isKindOfClass: [Reachability class]]);
    NetworkStatus netStatus = [curReach currentReachabilityStatus];
    BOOL connectionRequired = [curReach connectionRequired];
    switch (netStatus)
    {
        case NotReachable:
        {
            [[NSUserDefaults standardUserDefaults] setInteger:kNOTREACHABLE forKey:kREACHABILITYSTATUS];
            NSLog(@"NotReachable");
            connectionRequired = NO;  
            break;
        }

        case ReachableViaWWAN:
        {
            [[NSUserDefaults standardUserDefaults] setInteger:kREACHABLEVIAWWAN forKey:kREACHABILITYSTATUS];
            NSLog(@"ReachableViaWWAN");
            break;
        }
        case ReachableViaWiFi:
        {
            [[NSUserDefaults standardUserDefaults] setInteger:kNOTREACHABLE forKey:kREACHABILITYSTATUS];
            NSLog(@"ReachableViaWiFi");
            break;
        }
    }
}

Answer 1

OK, so after trying a few things out myself, I actually got it to work, by adding one extra line of code:

-(void)setupReachability {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotificationV2 object:nil];
    hostReach = [[ReachabilityV2 reachabilityWithHostName:@"www.google.com"] retain];
    [hostReach connectionRequired]; // this line was added, and apparently forces a connection requirement..
    [hostReach startNotifier];
}