增加GanttChart甘特图

Runtime/Utils/DateTimeUtil.cs

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+/************************************************/
+/*                                              */
+/*     Copyright (c) 2018 - 2021 monitor1394    */
+/*     https://github.com/monitor1394           */
+/*                                              */
+/************************************************/
+
+using System;
+using UnityEngine;
+
+namespace XCharts
+{
+    public static class DateTimeUtil
+    {
+        private static readonly DateTime k_DateTime1970 = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
+
+        public static int GetTimestamp()
+        {
+            return (int)(DateTime.Now - k_DateTime1970).TotalSeconds;
+        }
+
+        public static int GetTimestamp(DateTime time)
+        {
+            return (int)(time - k_DateTime1970).TotalSeconds;
+        }
+
+        public static DateTime GetDateTime(int timestamp)
+        {
+            long span = ((long)timestamp) * 10000000;
+            return k_DateTime1970.Add(new TimeSpan(span));
+        }
+    }
+}

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