在开发中，有时候需要获取流量统计信息。研究发现：通过函数getifaddrs来得到系统网络接口的信息，网络接口的信息，包含在if_data字段中， 有很多信息， 但我现在只关心ifi_ibytes, ifi_obytes, 应该就是接收到的字节数和发送的字节数, 加起来就是流量了。还发现，接口的名字， 有en, pdp_ip, lo等几种形式，en应该是wifi, pdp_ip大概是3g或者gprs, lo是环回接口, 通过名字区分可以分别统计。
1、导入必要头文件
#include <ifaddrs.h>
#include <sys/socket.h>
#include <net/if.h>
2、获取3G或者GPRS的流量
//获取3G或者GPRS的流量
+ (NSString *)getGprs3GFlowIOBytes
{ struct ifaddrs *ifa_list = , *ifa;
if (getifaddrs(&ifa_list) == -)
{
return ;
} uint32_t iBytes = ;
uint32_t oBytes = ; 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 == )
continue; //3G或者GPRS
if (!strcmp(ifa->ifa_name, "pdp_ip0"))
{
struct if_data *if_data = (struct if_data *)ifa->ifa_data; iBytes += if_data->ifi_ibytes;
oBytes += if_data->ifi_obytes;
NSLog(@"%s :iBytes is %d, oBytes is %d",
ifa->ifa_name, iBytes, oBytes);
}
} freeifaddrs(ifa_list); uint32_t bytes = ; bytes = iBytes + oBytes; //将bytes单位转换 if(bytes < ) // B
{
return [NSString stringWithFormat:@"%dB", bytes];
}
else if(bytes >= && bytes < * ) // KB
{
return [NSString stringWithFormat:@"%.1fKB", (double)bytes / ];
}
else if(bytes >= * && bytes < * * ) // MB
{
return [NSString stringWithFormat:@"%.2fMB", (double)bytes / ( * )];
}
else // GB
{
return [NSString stringWithFormat:@"%.3fGB", (double)bytes / ( * * )];
} }
3、获取Wifi流量
//获取Wifi流量
+ (NSString *)getGprsWifiFlowIOBytes
{
struct ifaddrs *ifa_list = , *ifa;
if (getifaddrs(&ifa_list) == -) {
return ;
}
uint32_t iBytes = ;
uint32_t oBytes = ;
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 == )
continue; //Wifi
if (strncmp(ifa->ifa_name, "lo", )) {
struct if_data *if_data = (struct if_data *)ifa->ifa_data;
iBytes += if_data->ifi_ibytes;
oBytes += if_data->ifi_obytes;
NSLog(@"%s :iBytes is %d, oBytes is %d", ifa->ifa_name, iBytes, oBytes);
}
} freeifaddrs(ifa_list); uint32_t bytes = ; bytes = iBytes+oBytes; NSLog(@"%d",bytes); //将bytes单位转换
if(bytes < ) // B
{
return [NSString stringWithFormat:@"%dB", bytes];
}
else if(bytes >= && bytes < * ) // KB
{
return [NSString stringWithFormat:@"%.1fKB", (double)bytes / ];
}
else if(bytes >= * && bytes < * * ) // MB
{
return [NSString stringWithFormat:@"%.2fMB", (double)bytes / ( * )];
}
else // GB
{
return [NSString stringWithFormat:@"%.3fGB", (double)bytes / ( * * )];
}
}
注意：1、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.
2、上面两方法统计的结果是字符串格式