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 =
0, *
ifa;
if (getifaddrs(&ifa_list) == -
1)
{
return 0;
}
uint32_t iBytes =
0;
uint32_t oBytes =
0;
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;
//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 =
0;
bytes = iBytes +
oBytes;
//将bytes单位转换
if(bytes <
1024)
// B
{
return [NSString stringWithFormat:
@"%dB", bytes];
}
else if(bytes >=
1024 && bytes <
1024 *
1024)
// KB
{
return [NSString stringWithFormat:
@"%.1fKB", (
double)bytes /
1024];
}
else if(bytes >=
1024 *
1024 && bytes <
1024 *
1024 *
1024)
// MB
{
return [NSString stringWithFormat:
@"%.2fMB", (
double)bytes / (
1024 *
1024)];
}
else // GB
{
return [NSString stringWithFormat:
@"%.3fGB", (
double)bytes / (
1024 *
1024 *
1024)];
}
}
3、获取Wifi流量
//获取Wifi流量
+ (NSString *
)getGprsWifiFlowIOBytes
{
struct ifaddrs *ifa_list =
0, *
ifa;
if (getifaddrs(&ifa_list) == -
1) {
return 0;
}
uint32_t iBytes =
0;
uint32_t oBytes =
0;
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;
//Wifi
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;
NSLog(@"%s :iBytes is %d, oBytes is %d", ifa->
ifa_name, iBytes, oBytes);
}
}
freeifaddrs(ifa_list);
uint32_t bytes =
0;
bytes = iBytes+
oBytes;
NSLog(@"%d",bytes);
//将bytes单位转换
if(bytes <
1024)
// B
{
return [NSString stringWithFormat:
@"%dB", bytes];
}
else if(bytes >=
1024 && bytes <
1024 *
1024)
// KB
{
return [NSString stringWithFormat:
@"%.1fKB", (
double)bytes /
1024];
}
else if(bytes >=
1024 *
1024 && bytes <
1024 *
1024 *
1024)
// MB
{
return [NSString stringWithFormat:
@"%.2fMB", (
double)bytes / (
1024 *
1024)];
}
else // GB
{
return [NSString stringWithFormat:
@"%.3fGB", (
double)bytes / (
1024 *
1024 *
1024)];
}
}
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
