Question

I followed this link iPhone reachability checking
but can anyone help me with if the user has not connected to internet how to take him to setting menu

Answer 1

In iOS 5.0 and 5.0.1 you can use this:

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs://"]];

However, in iOS 4.3 and older and in iOS 5.1 and later, this URL scheme is not associated with the Settings app – if you want your app to be accepted in the AppStore, you don’t really have any option other than asking the user to go to Settings. However, if jailbroken/non-AppStore development is an alternative, you can use a private function for opening an app:

SBSLaunchApplicationWithIdentifier(CFSTR("com.apple.preferences"), false);

This function is located in the SpringBoardServices private framework.