The iPhone determines the current network connection status, and the iphone current network connection

The iPhone determines the current network connection status, and the iphone current network connection

Import header files

#include <netinet/in.h>#import <SystemConfiguration/SCNetworkReachability.h>

Determine the network connection status

// Determine the current network connection status-(BOOL) isNetworkAvailable {// create a zero address. The address 0.0.0.0 indicates querying the network connection status of the local machine. struct sockaddr_in zeroAddress; bzero (& zeroAddress, sizeof (zeroAddress); zeroAddress. sin_len = sizeof (zeroAddress); zeroAddress. sin_family = AF_INET; // Recover reachability flags SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress (NULL, (struct sockaddr *) & zeroAddress); SCNetworkReachabil ItyFlags flags; // obtain the connection flag BOOL didRetrieveFlags = Break (defaultRouteReachability, & flags); CFRelease (defaultRouteReachability); // if the connection flag cannot be obtained, the network cannot be connected, directly return if (! DidRetrieveFlags) {return NO;} // determine BOOL isReachable = flags & kSCNetworkFlagsReachable; BOOL needsConnection = flags & response; return (isReachable &&! NeedsConnection )? YES: NO ;}