ios - 是否有用于获取有关应用程序网络使用情况的信息的 api？

Question

我想创建一个应用程序来显示设备上安装的所有应用程序以及有关该应用程序的网络使用情况的信息。有获取网络使用信息的api吗？

Answer 1

您自己的应用程序可以使用下面的代码了解设备使用了多少数据以及如何使用，但无法知道每个特定应用程序使用了多少数据。像我的数据管理器这样的应用程序曾经为您提供每个应用程序的分割，但 a) 并不完全准确，b) 现在在 iOS 7 中不再这样做。还有另一个应用程序通过 VPN 将数据发送到其服务器并在App Store 上的屏幕截图让它看起来像是可以为每个应用程序提供分割，但这是旋转但实际上它不能，除了少数和来自用户的一些交互。基本上每个应用程序都无法保证准确的方法。

此外，也无法保证准确了解所有已安装的应用程序。有一些机制可以根据数据库很好地猜测安装了什么，但无法确切地知道安装了什么

#include <arpa/inet.h> 
#include <net/if.h> 
#include <ifaddrs.h> 
#include <net/if_dl.h>


- (void) getDataUsage
{
    NSTimeInterval elapsedTime = [[NSDate date] timeIntervalSinceDate: self.timeThatDataMonitoringStarted];
    NSLog(@"********* GETTING DATA USAGE. Elapsed time: %f **************",elapsedTime);
    NSArray *data = [self getDataCounters];

    NSNumber *wifiSentSinceBoot = (NSNumber*)data[0];
    NSNumber *wifiReceivedSinceBoot = (NSNumber*)data[1];
    NSNumber *wwanSentSinceBoot = (NSNumber*)data[2];
    NSNumber *wwanReceivedSinceBoot = (NSNumber*)data[3];

    int wifiSentSinceBootAsInt      = [wifiSentSinceBoot intValue];
    int wifiReceivedSinceBootAsInt  = [wifiReceivedSinceBoot intValue];
    int wWanSentSinceBootAsInt      = [wwanSentSinceBoot intValue];
    int wWanReceivedSinceBootAsInt  = [wwanReceivedSinceBoot intValue];

    static int initialWifiSent;
    static int initialWifiReceived;
    static int initialWWanSent;
    static int initialWWanReceived;
    if (!self.initialDataValuesSet)
    {
        self.initialDataValuesSet    = YES;
        initialWifiSent     = wifiSentSinceBootAsInt;
        initialWifiReceived = wifiReceivedSinceBootAsInt;
        initialWWanSent     = wWanSentSinceBootAsInt;
        initialWWanReceived = wWanReceivedSinceBootAsInt;
    }

    int wifiSentSinceLastRetrieval     = wifiSentSinceBootAsInt - initialWifiSent;
    int wifiReceivedSinceLastRetrieval = wifiReceivedSinceBootAsInt - initialWifiReceived;
    int wWanSentSinceLastRetrieval     = wWanSentSinceBootAsInt - initialWWanSent;
    int wWanReceivedSinceLastRetrieval  = wWanReceivedSinceBootAsInt - initialWWanReceived;

    uint dataUsed = wifiSentSinceLastRetrieval + wifiReceivedSinceLastRetrieval + wWanSentSinceLastRetrieval + wWanReceivedSinceLastRetrieval;
    NSLog(@"Total data: %d", dataUsed);
}


- (NSArray *) getDataCounters
{
    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"])
                {
                    networkStatisc = (const struct if_data *) cursor->ifa_data;
                    WiFiSent+=networkStatisc->ifi_obytes;
                    WiFiReceived+=networkStatisc->ifi_ibytes;
                    //  NSLog(@"WiFiSent %d ==%d",WiFiSent,networkStatisc->ifi_obytes);
                    //  NSLog(@"WiFiReceived %d ==%d",WiFiReceived,networkStatisc->ifi_ibytes);
                }

                if ([name hasPrefix:@"pdp_ip"])
                {
                    networkStatisc = (const struct if_data *) cursor->ifa_data;
                    WWANSent+=networkStatisc->ifi_obytes;
                    WWANReceived+=networkStatisc->ifi_ibytes;
                    //  NSLog(@"WWANSent %d ==%d",WWANSent,networkStatisc->ifi_obytes);
                    //  NSLog(@"WWANReceived %d ==%d",WWANReceived,networkStatisc->ifi_ibytes);
                }
            }

            cursor = cursor->ifa_next;
        }

        freeifaddrs(addrs);
    }

    return [NSArray arrayWithObjects:[NSNumber numberWithInt:WiFiSent], [NSNumber numberWithInt:WiFiReceived],[NSNumber numberWithInt:WWANSent],[NSNumber numberWithInt:WWANReceived], nil];
}