unity 根据纪元时间(1970/1/1)转换为DateTime

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首先，先说一下怎么根据DateTime获得时间的长整型

public static uint GetLongTime()
{
DateTime time197011 = new DateTime(1970, 1, 1);
DateTime time = DateTime.Now;
TimeSpan ts = time - time197011;
TimeZone localZone = TimeZone.CurrentTimeZone;
TimeSpan off = localZone.GetUtcOffset(time);
ts -= off;
return (uint)ts.TotalSeconds;
}

然后，下面就是根据长整型转DateTime

public DateTime SystemTime2DateTime()
{
DateTime dt197011 = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lsystemTime = long.Parse(GetLongTime() + "0000000");
TimeSpan toNowTs = new TimeSpan(lsystemTime);
return dt197011.Add(toNowTs);
}

根据DateTime输出具体的年月日可以这样做

DateTime dt=SystemTime2DateTime();

Debug.Log(dt.ToString("yyyy/MM/dd HH:mm:ss"));//24小时制//

Debug.Log(dt.ToString("yyyy/MM/dd hh:mm:ss"));//12小时制//

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