ios获得本机ip怎么样可以获取

使用一套C的方法去获取IP地址
IPAddress.h：声明文件
复制代码
//
// IPAddress.h
// IP_Test
//
// Created by 夏远全 on 16/7/15.
// Copyright © 2016年 xiayuanquan. All rights reserved.
//
#ifndef IPAddress_h
#define IPAddress_h
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define BUFFERSIZE 4000
#define MAXADDRS 32
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))
extern char *if_names[MAXADDRS];
extern char *ip_names[MAXADDRS];
extern char *hw_addrs[MAXADDRS];
extern unsigned long ip_addrs[MAXADDRS];
// Function prototypes
void InitAddresses();
void FreeAddresses();
void GetIPAddresses();
void GetHWAddresses();
#endif /* IPAddress_h */
IPAddress.c：实现文件

//// IPAddress.c// IP_Test//// Created by 夏远全 on 16/7/15.// Copyright © 2016年 xiayuanquan. All rights reserved.//#include "IPAddress.h"char *if_names[MAXADDRS];char *ip_names[MAXADDRS];char *hw_addrs[MAXADDRS];
unsigned long ip_addrs[MAXADDRS];static int nextAddr = 0;void InitAddresses()
{ int i; for (i=0; i{
if_names[i] = ip_names[i] = hw_addrs[i] = NULL;
ip_addrs[i] = 0;
}
}void FreeAddresses()
{ int i; for (i=0; i{ if (if_names[i] != 0) free(if_names[i]); if (ip_names[i] != 0) free(ip_names[i]); if (hw_addrs[i] != 0) free(hw_addrs[i]);
ip_addrs[i] = 0;
}
InitAddresses();
}void GetIPAddresses()
{ int i, len, flags; char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr; struct ifconf ifc; struct ifreq *ifr, ifrcopy; struct sockaddr_in *sin;
char temp[80];
int sockfd;
for (i=0; i{
if_names[i] = ip_names[i] = NULL;
ip_addrs[i] = 0;
}

sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd < 0)
{
perror("socket failed"); return;
}

ifc.ifc_len = BUFFERSIZE;
ifc.ifc_buf = buffer;
if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0)
{
perror("ioctl error"); return;
}

lastname[0] = 0;
for (ptr = buffer; ptr < buffer + ifc.ifc_len; )
{
ifr = (struct ifreq *)ptr;
len = max(sizeof(struct sockaddr), ifr->ifr_addr.sa_len);
ptr += sizeof(ifr->ifr_name) + len; // for next one in buffer

if (ifr->ifr_addr.sa_family != AF_INET)
{ continue; // ignore if not desired address family }
if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL)
{ *cptr = 0; // replace colon will null }
if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0)
{ continue; /* already processed this interface */
}

memcpy(lastname, ifr->ifr_name, IFNAMSIZ);

ifrcopy = *ifr;
ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
flags = ifrcopy.ifr_flags; if ((flags & IFF_UP) == 0)
{ continue; // ignore if interface not up }

if_names[nextAddr] = (char *)malloc(strlen(ifr->ifr_name)+1); if (if_names[nextAddr] == NULL)
{ return;
}
strcpy(if_names[nextAddr], ifr->ifr_name);

sin = (struct sockaddr_in *)&ifr->ifr_addr;
strcpy(temp, inet_ntoa(sin->sin_addr));

ip_names[nextAddr] = (char *)malloc(strlen(temp)+1); if (ip_names[nextAddr] == NULL)
{ return;
}
strcpy(ip_names[nextAddr], temp);

ip_addrs[nextAddr] = sin->sin_addr.s_addr;
++nextAddr;
}

close(sockfd);
}void GetHWAddresses()
{ struct ifconf ifc; struct ifreq *ifr; int i, sockfd; char buffer[BUFFERSIZE], *cp, *cplim; char temp[80];
for (i=0; i{
hw_addrs[i] = NULL;
}

sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd < 0)
{
perror("socket failed"); return;
}

ifc.ifc_len = BUFFERSIZE;
ifc.ifc_buf = buffer;
if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0)
{
perror("ioctl error");
close(sockfd); return;
}

ifr = ifc.ifc_req;

cplim = buffer + ifc.ifc_len;
for (cp=buffer; cp < cplim; )
{
ifr = (struct ifreq *)cp; if (ifr->ifr_addr.sa_family == AF_LINK)
{ struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; int a,b,c,d,e,f; int i;

strcpy(temp, (char *)ether_ntoa((const struct ether_addr *)LLADDR(sdl)));
sscanf(temp, "%x:%x:%x:%x:%x:%x", &a, &b, &c, &d, &e, &f);
sprintf(temp, "%02X:%02X:%02X:%02X:%02X:%02X",a,b,c,d,e,f);
for (i=0; i{ if ((if_names[i] != NULL) && (strcmp(ifr->ifr_name, if_names[i]) == 0))
{ if (hw_addrs[i] == NULL)
{
hw_addrs[i] = (char *)malloc(strlen(temp)+1);
strcpy(hw_addrs[i], temp); break;
}
}
}
}
cp += sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len);
}
close(sockfd);
}