iOS 获取流量

#include <arpa/inet.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <net/if_dl.h>

- (NSArray *)getDataCounters
{
    BOOL   success;
    struct ifaddrs *addrs;
    const struct ifaddrs *cursor;
    const struct if_data *networkStatisc;

    int WiFiSent = ;
    int WiFiReceived = ;
    int WWANSent = ;
    int WWANReceived = ;

    NSString *name=[[NSString alloc]init];

    success = getifaddrs(&addrs) == ;
    if (success)
    {
        cursor = addrs;
        while (cursor != NULL)
        {
            name=[NSString stringWithFormat:@"%s",cursor->ifa_name];
            NSLog(@"ifa_name %s == %@\n", cursor->ifa_name,name);
            // names of interfaces: en0 is WiFi ,pdp_ip0 is WWAN
            if (cursor->ifa_addr->sa_family == AF_LINK)
            {
                if ([name hasPrefix:@"en"])
                {
                    networkStatisc = (const struct if_data *) cursor->ifa_data;
                    WiFiSent+=networkStatisc->ifi_obytes;
                    WiFiReceived+=networkStatisc->ifi_ibytes;
                    NSLog(@"WiFiSent %d ==%d",WiFiSent,networkStatisc->ifi_obytes);
                    NSLog(@"WiFiReceived %d ==%d",WiFiReceived,networkStatisc->ifi_ibytes);
                }
                if ([name hasPrefix:@"pdp_ip"])
                {
                    networkStatisc = (const struct if_data *) cursor->ifa_data;
                    WWANSent+=networkStatisc->ifi_obytes;
                    WWANReceived+=networkStatisc->ifi_ibytes;
                    NSLog(@"WWANSent %d ==%d",WWANSent,networkStatisc->ifi_obytes);
                    NSLog(@"WWANReceived %d ==%d",WWANReceived,networkStatisc->ifi_ibytes);
                }
            }
            cursor = cursor->ifa_next;
        }
        freeifaddrs(addrs);
    }
    return [NSArray arrayWithObjects:[NSNumber numberWithInt:WiFiSent], [NSNumber numberWithInt:WiFiReceived],[NSNumber numberWithInt:WWANSent],[NSNumber numberWithInt:WWANReceived], nil];
}