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.

-(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]];
}