自己统计流量的话 需要判断是3G访问还是WIFI访问
用 NSURLProtocol
自定义一个这个
累计DATA就是下行流量
#include <arpa/inet.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <net/if_dl.h>
BOOL success;
    struct ifaddrs *addrs;
    const struct ifaddrs *cursor;
//    const struct if_data *networkStatisc;
    
//    int WiFiSent = 0;
//    int WiFiReceived = 0;
//    int WWANSent = 0;
//    int WWANReceived = 0;
    
    NSString *name=[[NSString alloc]init];
    
    success = getifaddrs(&addrs) == 0;
    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"])
                {
                  AppDelegate *fewfe=[[UIApplication sharedApplication]delegate];
                   
                    fewfe.liuliang=[NSString stringWithFormat:@"%d",[fewfe.liuliang intValue]+data.length];
                    
                    if ([fewfe.liuliang intValue]>1073741824) {
                        int zhongjian=[fewfe.liuliang intValue]-1073741824;
                        fewfe.liuliang=[NSString stringWithFormat:@"%d",zhongjian];
                        fewfe.liuliangG=[NSString stringWithFormat:@"%d",[fewfe.liuliangG intValue]+1];
                    }
                //NSLog(@"wifide--%@ ",fewfe.liuliang);
                    
                }
                if ([name hasPrefix:@"pdp_ip"])
                {
                      NSLog(@"3gde ");
                    
                    
                    
                    
                    
                }
            }
           cursor = cursor->ifa_next;
        }
       freeifaddrs(addrs);
    }
原文:http://www.cnblogs.com/Smallbadegg/p/3790509.html