struct ifaddrs *address = NULL;
    struct ifaddrs *temp = NULL;
    if (0 != getifaddrs(&address)) {
        NSLog(@"getifaddrs error = %s",strerror(errno));
        return;
    }
    temp = address;
    while (temp->ifa_next != NULL) {
        NSString *if_name = [NSString stringWithUTF8String:temp->ifa_name];
        if ([if_name isEqualToString:@"en1"]) {
            struct sockaddr *ifa_addr = temp->ifa_addr;
            if (ifa_addr->sa_family == AF_INET) {
                struct sockaddr_in *in_address = (struct sockaddr_in *)ifa_addr;
                char *ip_str;
                ip_str = inet_ntoa(in_address->sin_addr);
                ipTF.stringValue = [NSString stringWithFormat:@"%s",ip_str];
            }
        }
        temp = temp->ifa_next;
    }
    freeifaddrs(address);