进来接微信支付,后台要传ip地址,so~

首先要导这些头文件

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <math.h>
 4 #include <string.h>
 5 #include <unistd.h>
 6 #include <sys/ioctl.h>
 7 #include <sys/types.h>
 8 #include <sys/sysctl.h>
 9 #include <sys/socket.h>
10 #include <netinet/in.h>
11 #include <netdb.h>
12 #include <arpa/inet.h>
13 #include <sys/sockio.h>
14 #include <net/if.h>
15 #include <net/ethernet.h>
16 #include <errno.h>
17 #include <net/if_dl.h>
18 #include <ifaddrs.h>
19 #include <mach/machine.h>

然后就是方法啦:

 1 + (NSString *)getIPAddress
 2 {
 3     NSString *address = @"error";
 4     struct ifaddrs *interfaces = NULL;
 5     struct ifaddrs *temp_addr = NULL;
 6     int success = 0;
 7     // retrieve the current interfaces - returns 0 on success
 8     success = getifaddrs(&interfaces);
 9     if (success == 0)
10     {
11         // Loop through linked list of interfaces
12         temp_addr = interfaces;
13         while(temp_addr != NULL)
14         {
15             if(temp_addr->ifa_addr->sa_family == AF_INET)
16             {
17                 // Check if interface is en0 which is the wifi connection on the iPhone
18                 if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"])
19                 {
20                     // Get NSString from C String
21                     address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
22                 }
23             }
24             temp_addr = temp_addr->ifa_next;
25         }
26     }
27     // Free memory
28     freeifaddrs(interfaces);
29     return address;
30 }

我是给放在工具类里面了,哪里要用调哪里~so easy~