If your application connects to the network, it’s important that you provide the appropriate error messages when the network is not present. See the Reachability iPhone program sample which demonstrates the use of the System Configuration Reachability API to detect the absence of WiFi and Wireless Wide Area Network (WWAN) services, so that you can notify your users that a network connection is not available. Your application can then take appropriate action at the first point where network services are required.
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