Unity 比较时间大小

1.比较时间的大小

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Time_Size : MonoBehaviour
{
    public string msg;
    private void Start()
    {
        DateTime date = DateTime.Now.ToLocalTime();  //当前系统时间
        string data1 = "2021/1/1 12:12:12";       // "/" 跟 "-" 效果是一样的
        //string data3 = "2021-01-01 12:12:12";
        CompanyDate(date .ToString (), data1, ref msg);
    }
    public void CompanyDate(string dateStr1, string dateStr2, ref string msg)
    {
        //将日期字符串转换为日期对象
        DateTime t1 = Convert.ToDateTime(dateStr1);
        DateTime t2 = Convert.ToDateTime(dateStr2);
        //通过DateTIme.Compare()进行比较（）
        int num = DateTime.Compare(t1, t2);

        //t1> t2
        if (num > 0)
        {
            msg = "t1:(" + dateStr1 + ")大于" + "t2(" + dateStr2 + ")";
        }
        //t1= t2
        if (num == 0)
        {
            msg = "t1:(" + dateStr1 + ")等于" + "t2(" + dateStr2 + ")";
        }
        //t1< t2
        if (num < 0)
        {
            msg = "t1:(" + dateStr1 + ")小于" + "t2(" + dateStr2 + ")";
        }
    }
    // Update is called once per frame
    void Update()
    {
        
    }
}