Reachability AlertView in iOS Programing - ios

Question

So I make alert view detects if there in a active internet connection.
This is the Code:
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(reachabilityChanged:)
name:kReachabilityChangedNotification
object:nil];
Reachability * reach = [Reachability reachabilityWithHostname:#"www.google.com"];
reach.reachableBlock = ^(Reachability * reachability)
{
dispatch_async(dispatch_get_main_queue(), ^{
blockLabel.text = #"";
});
};
reach.unreachableBlock = ^(Reachability * reachability)
{
dispatch_async(dispatch_get_main_queue(), ^{
blockLabel.text = #"You are not connected to the Internet";
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Please connect to Internet"
message:nil
delegate:self
cancelButtonTitle:nil
otherButtonTitles:nil];
UIActivityIndicatorView *progress= [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)];
progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
[alert addSubview:progress];
[progress startAnimating];
[alert show];
});
};
[reach startNotifier];
// Do any additional setup after loading the view, typically from a nib.
}
So my application detects if there is a internet connection. But the issue is that if I turn on internet on the iPhone and open the application it still saying there is not internet connection. What should I do…

Answer 1

Well i fix the issue by using notifications.. Code for Reference
-(void)reachabilityChanged:(NSNotification*)note
{
Reachability * reach = [note object];
if([reach isReachable])
{
notificationLabel.text = #"Notification Says Reachable";
NSLog(#"Internet is Up");
}
else
{
notificationLabel.text = #"Notification Says Unreachable";
NSLog(#"Internet is Down");
}
}

Answer 2

You could always implement a non-stop checking for host reachability (or internet connectivity) by signing up for reachability notifications.
One of best examples on how to do this can be found here on SO: How to check for an active Internet Connection on iPhone SDK?
This way your app will always know if the host is reachable or not.

Answer 3

There is no telling what your sparse code does as it does not even look like your Reachability class is Apple's Reachability sample code wrapper around the SystemConfiguration API , you can find that at http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html
The simplest and most definitive check is just a uncached NSURLRequest for a specific url (not just a hostname which merely tests if DNS resolution is working which is not a definitive test and could even be cached)