iPhone app crashes while checking internet connectivity

In my iPhone app, I need to detect the internet Connection availability.

So I am referencing some files from "Reachability" project of Apple.

Link is given below:

http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html

I create a new project and implement the code below in viewWillAppear but the app crashes.

I included the Reachability.h, Reachability.m from Apple's demo project.

I also included SystemConfiguration Framework.

app works fine when Int开发者_JAVA技巧ernet is Working. But app Crashes when Internet in not Working.

Even I checked the console but there is no notification or error shown in the console.

   Reachability *r = [Reachability reachabilityWithHostName:@"www.google.com"];

NetworkStatus internetStatus = [r currentReachabilityStatus];
if ((internetStatus == ReachableViaWiFi) || (internetStatus == ReachableViaWWAN))
{
    UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"Internet Connection" message:@"Available" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    [myAlert show];
    [myAlert release];
    }
else
{
    UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"This app require an internet connection via WiFi or cellular network to work." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    [myAlert show];
    [myAlert release];
    }

What could be the reason for crash?

What should I do?

Thanks!!

You're over-releasing the alerts. First, you do autorelease and then additionally release, which is too much. Just remove the two [myAlert release]; and it should work.

Here it may be the case that your code does not work on simulator because of time out. But try running it on device. Also try debugging the code as @greg rightly said. For that credit should go to @greg. Hope this helps. Let me know if it works.

Your problem is elsewhere in your code, as the code you provided along with copying Reachability.[mh] into a fresh Xcode project seems to work without crashing. When your app crashes, it must have some sort of information logged in the console. If there truly is nothing, set a breakpoint in your "startup" methods (viewWillLoad, viewDidLoad, AppDelegate stuff and step through line-by-line until you catch the problem.