IP 地址獲取方式：

+ (NSString *)getIPAddress
{

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);

  if ([address isEqualToString:@"error"])
  {
     address = @"169.254.230.225";
  }
  return address;
}

mac地址獲取方式:

 + (NSString *)GetMacUUID
{
  NSString *str = [SSKeychain passwordForService:UUIDService   account:UUIDAccount];

  if (str == nil || str.length == 0)
  {
      CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
      NSString *uuid = (__bridge NSString *)CFUUIDCreateString (kCFAllocatorDefault,uuidRef);
    BOOL rs = [SSKeychain setPassword:uuid forService:UUIDService account:UUIDAccount];
    assert(rs != NO);
    return uuid;
  }  else  {
      return str;
  }
}