ios获取手机的ip

貌似ASI里获取ip地址的链接不可以了。也曾试过whatismyip，在其网站上的截图获取的ip是正确的，单不知道为什么在我这里却是错误的。所以，在这里分享一下获得手机ip的方法。代码最初源自老外，通过系统提供的api获取的，这里我就直接贴代码了：

在创建的获得ip类的头文件里：

 #define MAXADDRS    32

 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();

实现文件里：

先导入文件

 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include
 #include if.h>
 #include
 #include

具体实现的代码

 #define    min(a,b)    ((a) < (b) ? (a) : (b))
 #define    max(a,b)    ((a) > (b) ? (a) : (b))

 #define BUFFERSIZE    4000

 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(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);
 }

然后就是调用了，首先在我们的类里面导入上面那个类，之后在实现文件里写函数

 - (NSString *)deviceIPAdress {
     InitAddresses();
     GetIPAddresses();
     GetHWAddresses();
     return [NSString stringWithFormat:@"%s", ip_names[1]];
 }

然后在我们需要获得ip的地方写上

 NSString* myip = [self deviceIPAdress];

这里的myip就是我们需要的ip地址了

手机截图

程序打印截图