首先需要導(dǎo)入系統(tǒng)頭文件:
- (NSString *)getIPAddresses
{
int sockfd =socket(AF_INET,SOCK_DGRAM, 0);
//? ? if (sockfd < 0) return nil;
NSMutableArray *ips = [NSMutableArray array];
int BUFFERSIZE =4096;
struct ifconf ifc;
char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
struct ifreq *ifr, ifrcopy;
ifc.ifc_len = BUFFERSIZE;
ifc.ifc_buf = buffer;
if (ioctl(sockfd,SIOCGIFCONF, &ifc) >= 0){
for (ptr = buffer; ptr < buffer + ifc.ifc_len; ){
ifr = (struct ifreq *)ptr;
int len =sizeof(struct sockaddr);
if (ifr->ifr_addr.sa_len > len) {
len = ifr->ifr_addr.sa_len;
}
ptr += sizeof(ifr->ifr_name) + len;
if (ifr->ifr_addr.sa_family !=AF_INET) continue;
if ((cptr = (char *)strchr(ifr->ifr_name,':')) != NULL) *cptr =0;
if (strncmp(lastname, ifr->ifr_name,IFNAMSIZ) == 0)continue;
memcpy(lastname, ifr->ifr_name,IFNAMSIZ);
ifrcopy = *ifr;
ioctl(sockfd,SIOCGIFFLAGS, &ifrcopy);
if ((ifrcopy.ifr_flags &IFF_UP) == 0)continue;
NSString *ip = [NSString stringWithFormat:@"%s",inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)];
[ips addObject:ip];
}
}
close(sockfd);
NSString *IP =@"";
for (int i=0; i < ips.count; i++)
{
if (ips.count >0)
{
IP = [NSString stringWithFormat:@"%@",ips.lastObject];
}
}
NSLog(@"IP========%@",IP);
return IP;
}
