iOS 实时监控手机网速

#import "ViewController.h"
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <net/if.h>
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad]；   
    NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(getInternetface) userInfo:nil repeats:YES]；
    [timer fireDate];
}
- (void)getInternetface {
    long long hehe = [self getInterfaceBytes];
    NSLog(@"hehe:%lld",hehe)；
}
/*获取网络流量信息*/
- (long long) getInterfaceBytes
{
    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;
  /* Not a loopback device. */
       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;
        }
    }
    freeifaddrs(ifa_list);
    NSLog(@"\n[getInterfaceBytes-Total]%d,%d",iBytes,oBytes);
    return iBytes + oBytes;
}
@end