Determine the current network status of the iPhone and iPad

1. Download reachability demo, https://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html to Apple Network

Add reachability. h and reachability. m to the project.

2. Use the following method to determine whether the network is connected:

Bool ccnetworkconfig: isnetworkavailable ()

{

Reachability * r = [reachabilityreachabilitywithhostname: @ "www.apple.com"];

Switch ([rcurrentreachabilitystatus]) {

Casereachableviawwan:
// Use a 3G network

Printf ("current network 3g/GPRS \ n ");

Return true;

Casereachableviawifi:
// Use a Wi-Fi network

Printf ("current network WiFi \ n ");

Return true;

Casenotreachable:
// No network connection

Default:

Break;

}

Printf ("current network none \ n ");

Return false;

}