Question

使用iOS 9，我在iPhone控制台中看到奇怪的日志

当应用程序连接到远程服务时会出现这些日志，并且当连接速度很慢时，我会使用NSURLSession。有人对这个日志的含义有所了解，我应该关心这个：

-[NETAWDManager reportStats:metricID:] server 0x13cd19d70, container 0x13ce9dfe0, metrid 2686983, successfully reported:
<AWDLibnetcoreTCPConnectionReport: 0x13ce7af10> {
    cellularFallbackReport =     {
        dataUsageSnapshotsAtNetworkEvents =         (
                        {
                bytesIn = 0;
                bytesOut = 410;
            }
        );
        "fallbackTimer_msecs" = 0;
        fellback = 0;
        networkEvents =         (
            "NETWORK_EVENT_DATA_STALL_AT_APP_LAYER"
        );
        "timeToNetworkEvents_msecs" =         (
            3325
        );
    };
    clientIdentifier = "com.mydomain.myapp";
    connectionStatisticsReport =     {
        DNSAnswersCached = 1;
        "DNSResolvedTime_msecs" = 3;
        RTTvariance = 169;
        "appDataStallTimer_msecs" = 3;
        appReportingDataStallCount = 1;
        "bestRTT_msecs" = 359;
        betterRouteEventCount = 0;
        bytesDuplicate = 0;
        bytesIn = 37000;
        bytesOut = 410;
        bytesOutOfOrder = 0;
        bytesRetransmitted = 0;
        cellularFallback = 0;
        cellularRRCConnected = 0;
        connected = 1;
        connectedInterfaceType = "INTERFACE_TYPE_WIFI";
        "connectionEstablishmentTime_msecs" = 308;
        connectionReuseCount = 0;
        "currentRTT_msecs" = 79;
        "flowDuration_msecs" = 30750;
        interfaceType = "INTERFACE_TYPE_WIFI";
        kernelReportedStalls = 0;
        kernelReportingConnectionStalled = 0;
        kernelReportingReadStalled = 0;
        kernelReportingWriteStalled = 0;
        packetsDuplicate = 0;
        packetsIn = 26;
        packetsOut = 1;
        packetsOutOfOrder = 0;
        packetsRetransmitted = 0;
        "smoothedRTT_msecs" = 275;
        synRetransmissionCount = 0;
        tcpFastOpen = 0;
        "timeToConnectionEstablishment_msecs" = 315;
        "timeToConnectionStart_msecs" = 7;
        "timeToDNSResolved_msecs" = 7;
        "timeToDNSStart_msecs" = 4;
        trafficClass = 0;
    };
    delegated = 0;
    reportReason = "REPORT_REASON_DATA_STALL_AT_APP_LAYER";
}

Answer 1

根据标识符cellularFallbackReport，此邮件可能与WiFi Assist相关。它是iOS 9中的一项新功能，可检测慢速WiFi连接，并自动回退到手机的蜂窝无线电中。

这与您在连接速度较慢时发生日志消息的观察结果一致。

如果您能够可靠地重现信息，请尝试在设置中禁用WiFi辅助功能并查看其是否消失：

如果那真的是什么，你应该关心它吗？可能不是。这些消息表明iOS系统代表您的应用自动处理网络问题，而且您无能为力。

iOS奇怪的日志NETAWDManager

1 个答案: