iOS开发 ☞ 获取本机ip地址

有些支付的第三方是要用到下面这段代码的，顺便吐槽一下名气越大的支付SDK，封装的越LOW，我没有说微信。。。。。
一些封装的比较好的SDK像极光推送，也难怪人家过了C轮即将上市。

//iPv4

- (NSString *)getIpAddresses{    NSString *address = @"error";    struct ifaddrs *interfaces = NULL;    struct ifaddrs *temp_addr = NULL;    int success = 0;    // retrieve the current interfaces - returns 0 on success    success = getifaddrs(&interfaces);    if (success == 0)    {        // Loop through linked list of interfaces        temp_addr = interfaces;        while(temp_addr != NULL)        {            if(temp_addr->ifa_addr->sa_family == AF_INET)            {                // Check if interface is en0 which is the wifi connection on the iPhone                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"])                {                    // Get NSString from C String                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];                }            }            temp_addr = temp_addr->ifa_next;        }    }    // Free memory    freeifaddrs(interfaces);    return address;}

//ipv6

NSString *address = @"an error occurred when obtaining ip address";    struct ifaddrs *interfaces = NULL;    struct ifaddrs *temp_addr = NULL;    struct sockaddr_in *s4;    struct sockaddr_in6 *s6;    char buf[64];    int success = 0;    Reachability *reach = [Reachability reachabilityWithHostName:@"www.baidu.com"];    NetworkStatus netStatus = [reach currentReachabilityStatus];    //pdp_ip0 手机网络ip地址, en0 wifi 网络地址    NSString *netType = @"en0";    if (netStatus == ReachableViaWWAN) {        netType = @"pdp_ip0";    }    // retrieve the current interfaces - returns 0 on success    success = getifaddrs(&interfaces);    if (success == 0)      {          // Loop through linked list of interfaces          temp_addr = interfaces;          while(temp_addr != NULL)          {              if( temp_addr->ifa_addr->sa_family == AF_INET) {                  // Check if interface is en0 which is the wifi connection on the iPhone                  if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:netType])//en1 on simulator if mac on wifi                  {                      s4 = (struct sockaddr_in *)temp_addr->ifa_addr;                      if (inet_ntop(temp_addr->ifa_addr->sa_family, (void *)&(s4->sin_addr), buf, sizeof(buf)) == NULL)                      {                      }                      else{                          address = [NSString stringWithUTF8String:buf];                      }                  }              } else if (temp_addr->ifa_addr->sa_family == AF_INET6) {                  // Check if interface is en0 which is the wifi connection on the iPhone                  if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:netType])                  {                      s6 = (struct sockaddr_in6 *)(temp_addr->ifa_addr);                      if (inet_ntop(temp_addr->ifa_addr->sa_family, (void *)&(s6->sin6_addr), buf, sizeof(buf)) == NULL)                      {                      }                      else{                          address = [NSString stringWithUTF8String:buf];                      }                  }              }              temp_addr = temp_addr->ifa_next;          }    }    // Free memory    freeifaddrs(interfaces);    NSLog(@"手机的IP是：%@", address);    return address;