iOS開發監測手機流量使用方式

擷取手機使用流量存在幾個問題:
①iOS是無法像Android一樣監聽到開機廣播和關機廣播的,立刻關機再開機，監測的移動網路下流量會預設清空。
②應用在後台運行時，突然被殺死，無法對流量統計，需要在應用進入後台時先儲存流量使用方式
③如果使用者第一次開啟流量統計軟體是在2月份，當第3個月開啟時，應該對2月份使用的流量清零。但是問題來了，我們所能擷取的是從監測開始，消耗的總流量。套餐流量為每個月1000M，如果2月份消耗了200M流量，3月消耗了300M流量，我們無法判斷3月份流量剩餘情況，我們獲得的使用流量為500M。建議當新的一個月開始時，使用者首次開啟app，提醒使用者重新設定剩餘流量。

注意：請在真機上測試該代碼
核心代碼:
HTTraffic.h

#import <Foundation/Foundation.h>@interface HTTraffic : NSObject+ (NSDictionary *)getTrafficMonitorings;@end

HTTraffic.m

#import "HTTraffic.h"#include <arpa/inet.h>#include <net/if.h>#include <ifaddrs.h>#include <net/if_dl.h>@implementation HTTraffic/** *  WiFiSent WiFi發送流量 *  WiFiReceived WiFi接收流量 *  WWANSent 移動網路發送流量 *  WWANReceived 移動網路接收流量 */+ (NSDictionary *)getTrafficMonitorings {    NSDictionary * trafficDict = [[NSDictionary alloc] init];    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];            if (cursor->ifa_addr->sa_family == AF_LINK) {                //wifi消耗流量                if ([name hasPrefix:@"en"]) {                    networkStatisc = (const struct if_data *) cursor->ifa_data;                    WiFiSent+=networkStatisc->ifi_obytes;                    WiFiReceived+=networkStatisc->ifi_ibytes;                }                //移動網路消耗流量                if ([name hasPrefix:@"pdp_ip0"]) {                    networkStatisc = (const struct if_data *) cursor->ifa_data;                    WWANSent+=networkStatisc->ifi_obytes;                    WWANReceived+=networkStatisc->ifi_ibytes;                }            }            cursor = cursor->ifa_next;        }        freeifaddrs(addrs);    }    NSString *WiFiSentTraffic = [NSString stringWithFormat:@"%d",WiFiSent];    NSString *WiFiReceivedTraffic = [NSString stringWithFormat:@"%d",WiFiReceived];    NSString *WiFiTotalTraffic = [NSString stringWithFormat:@"%d",WiFiSent + WiFiReceived];    NSString *WWANSentTraffic = [NSString stringWithFormat:@"%d",WWANSent];    NSString *WWANReceivedTraffic = [NSString stringWithFormat:@"%d",WWANReceived];    NSString *WWANTotalTraffic = [NSString stringWithFormat:@"%d",WWANSent+WWANReceived];    trafficDict = @{                    @"WiFiSentTraffic":WiFiSentTraffic,                    @"WiFiReceivedTraffic":WiFiReceivedTraffic,                    @"WiFiTotalTraffic":WiFiTotalTraffic,                    @"WWANSentTraffic":WWANSentTraffic,                    @"WWANReceivedTraffic":WWANReceivedTraffic,                    @"WWANTotalTraffic":WWANTotalTraffic                    };    return trafficDict;}@end

流量監測demo