思路：先获取到总的流量信息，然后用当前的总下行流量减去上一秒的下行流量得到网速！
具体实现在以下三个方法！
//获取下行速度
- (void)getByteRate {
longlongintrate;
longlongintcurrentBytes = [selfgetInterfaceBytes];
if(self.lastBytes) {
//用上当前的下行总流量减去上一秒的下行流量达到下行速录
rate = currentBytes -self.lastBytes;
}else{
self.isFirstRate=NO;
}
//保存上一秒的下行总流量
self.lastBytes= [selfgetInterfaceBytes];
//格式化一下
NSString*rateStr = [selfformatNetWork:rate];
NSLog(@"当前网速%@",rateStr);
self.playerControl.LoadingView.rateLabel.text= [NSStringstringWithFormat:@"%@",rateStr];
}
//获取数据流量详情
- (longlongint)getInterfaceBytes {
structifaddrs*ifa_list =0, *ifa;
if(getifaddrs(&ifa_list) == -1) {
return0;
}
uint32_tiBytes =0;//下行
uint32_toBytes =0;//上行
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;
if(strncmp(ifa->ifa_name,"lo",2)) {
structif_data*if_data = (structif_data*)ifa->ifa_data;
iBytes += if_data->ifi_ibytes;
oBytes += if_data->ifi_obytes;
}
}
freeifaddrs(ifa_list);
//返回下行的总流量
returniBytes;
}
//格式化方法
- (NSString*)formatNetWork:(longlongint)rate {
if(rate <1024) {
return[NSStringstringWithFormat:@"%lldB/秒", rate];
}elseif(rate >=1024&& rate <1024*1024) {
return[NSStringstringWithFormat:@"%.1fKB/秒", (double)rate /1024];
}elseif(rate >=1024*1024&& rate <1024*1024*1024){
return[NSStringstringWithFormat:@"%.2fMB/秒", (double)rate / (1024*1024)];
}else{
return@"10Kb/秒";
};
}