iOS获取本级网络IP地址

#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);
    NSLog(@"addrees----%@",address);
    return address;
}