ios獲取本機網絡IP地址方法

#include <ifaddrs.h>

#include <arpa/inet.h>

 

 

- (NSString *)getIPAddress

{

     

     NSString *address = @ "error" ;

     struct  ifaddrs *interfaces = NULL;

     struct  ifaddrs *temp_addr = NULL;

     int  success = 0;

     

     // retrieve the current interfaces - returns 0 on success

     success = getifaddrs(&interfaces);

     if  (success == 0) {

         // Loop through linked list of interfaces

         temp_addr = interfaces;

         while  (temp_addr != NULL) {

             if ( temp_addr->ifa_addr->sa_family == AF_INET) {

                 // Check if interface is en0 which is the wifi connection on the iPhone

                 if  ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@ "en0" ]) {

                     // Get NSString from C String

                     address = [NSString stringWithUTF8String:inet_ntoa((( struct  sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

                 }

             }

             

             temp_addr = temp_addr->ifa_next;

         }

     }

     

     // Free memory

     freeifaddrs(interfaces);

     

     return  address;

}