Logging
,
UE4.27.2
lipengzha
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Log Timestamp

引擎默认的 Log 时间是 UTC，与国内的有差别，可以修改配置实现：

BaseEngine.ini
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[LogFiles]
PurgeLogsDays=5
MaxLogFilesOnDisk=10
LogTimes=True

通过控制 LogTimes 项的值可以设置不同的时区，可选项为None/UTC/SinceStart/Local/Timecode/(Ture/Flase(UTC))：

Launch/Private/LaunchEngineLoop.cpp
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static void CheckForPrintTimesOverride()
{
	// Determine whether to override the default setting for including timestamps in the log.
	FString LogTimes;
	if (GConfig->GetString(TEXT("LogFiles" ), TEXT("LogTimes" ), LogTimes, GEngineIni ))
	{
		if (LogTimes == TEXT("None" ))
		{
			CVarLogTimestamp->Set((int)ELogTimes::None, ECVF_SetBySystemSettingsIni);
		}
		else if (LogTimes == TEXT("UTC" ))
		{
			CVarLogTimestamp->Set((int)ELogTimes::UTC, ECVF_SetBySystemSettingsIni);
		}
		else if (LogTimes == TEXT("SinceStart" ))
		{
			CVarLogTimestamp->Set((int)ELogTimes::SinceGStartTime, ECVF_SetBySystemSettingsIni);
		}
		else if (LogTimes == TEXT("Local" ))
		{
			CVarLogTimestamp->Set((int)ELogTimes::Local, ECVF_SetBySystemSettingsIni);
		}
		else if (LogTimes == TEXT("Timecode" ))
		{
			CVarLogTimestamp->Set((int)ELogTimes::Timecode, ECVF_SetBySystemSettingsIni);
		}
		// Assume this is a bool for backward compatibility
		else if (FCString::ToBool(*LogTimes))
		{
			CVarLogTimestamp->Set((int)ELogTimes::UTC, ECVF_SetBySystemSettingsIni);
		}
	}

	if (FParse::Param(FCommandLine::Get(), TEXT("LOGTIMES" ) ))
	{
		CVarLogTimestamp->Set((int)ELogTimes::UTC, ECVF_SetByCommandline);
	}
	else if (FParse::Param(FCommandLine::Get(), TEXT("UTCLOGTIMES" ) ))
	{
		CVarLogTimestamp->Set((int)ELogTimes::UTC, ECVF_SetByCommandline);
	}
	else if (FParse::Param(FCommandLine::Get(), TEXT("NOLOGTIMES" ) ))
	{
		CVarLogTimestamp->Set((int)ELogTimes::None, ECVF_SetByCommandline);
	}
	else if (FParse::Param(FCommandLine::Get(), TEXT("LOGTIMESINCESTART" ) ))
	{
		CVarLogTimestamp->Set((int)ELogTimes::SinceGStartTime, ECVF_SetByCommandline);
	}
	else if (FParse::Param(FCommandLine::Get(), TEXT("LOCALLOGTIMES" ) ))
	{
		CVarLogTimestamp->Set((int)ELogTimes::Local, ECVF_SetByCommandline);
	}
	else if (FParse::Param(FCommandLine::Get(), TEXT("LOGTIMECODE" )))
	{
		CVarLogTimestamp->Set((int)ELogTimes::Timecode, ECVF_SetByCommandline);
	}
}