iphone获取当前流量信息

通过读取系统网络接口信息，获取当前iphone设备的流量相关信息，统计的是上次开机至今的流量信息. 

代码 悦德财富：https://yuedecaifu.com

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-(void)checkNetworkflow{     struct ifaddrs *ifa_list = 0, *ifa;     if (getifaddrs(&ifa_list) == -1)     {         return;     }           uint32_t iBytes     = 0;     uint32_t oBytes     = 0;     uint32_t allFlow    = 0;     uint32_t wifiIBytes = 0;     uint32_t wifiOBytes = 0;     uint32_t wifiFlow   = 0;     uint32_t wwanIBytes = 0;     uint32_t wwanOBytes = 0;     uint32_t wwanFlow   = 0;     struct timeval time ;           for (ifa = ifa_list; ifa; ifa = ifa->ifa_next)     {         if (AF_LINK != ifa->ifa_addr->sa_family)             continue;                   if (!(ifa->ifa_flags & IFF_UP) && !(ifa->ifa_flags & IFF_RUNNING))             continue;                   if (ifa->ifa_data == 0)             continue;                   // Not a loopback device.         // network flow         if (strncmp(ifa->ifa_name, "lo", 2))         {             struct if_data *if_data = (struct if_data *)ifa->ifa_data;                           iBytes += if_data->ifi_ibytes;             oBytes += if_data->ifi_obytes;             allFlow = iBytes + oBytes;             time = if_data->ifi_lastchange;         }                   //wifi flow         if (!strcmp(ifa->ifa_name, "en0"))           {              struct if_data *if_data = (struct if_data *)ifa->ifa_data;                            wifiIBytes += if_data->ifi_ibytes;              wifiOBytes += if_data->ifi_obytes;             wifiFlow    = wifiIBytes + wifiOBytes;         }                    //3G and gprs flow         if (!strcmp(ifa->ifa_name, "pdp_ip0"))           {              struct if_data *if_data = (struct if_data *)ifa->ifa_data;                            wwanIBytes += if_data->ifi_ibytes;              wwanOBytes += if_data->ifi_obytes;              wwanFlow    = wwanIBytes + wwanOBytes;         }     }     freeifaddrs(ifa_list);        changeTime.text     = [NSString stringWithFormat:@"%s",ctime(&time)];        receivedBytes.text  = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",iBytes]];     sentBytes.text      = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",oBytes]];     networkFlow.text    = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",allFlow]];     wifiReceived.text   = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wifiIBytes]];     wifiSent.text       = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wifiOBytes]];     wifiBytes.text      = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wifiFlow]];     wwanReceived.text   = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wwanIBytes]];     wwanSent.text       = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wwanOBytes]];     wwanBytes.text      = [self bytesToAvaiUnit:[NSString stringWithFormat:@"%u",wwanFlow]]; }