Unity3D使用C#脚本修改TextMeshPro的内容（以显示系统时间为例）

在网上找了很多都没有涉及到这个TextMeshPro内容修改，踩了很多坑，记录一下
特别是using TMPro; public TextMeshProUGUI Text; GetComponent();

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

public class ShowTime : MonoBehaviour
{
    // Start is called before the first frame update
    public TextMeshProUGUI Text;
    // Start is called before the first frame update
    void Start()
    {   
        Text = transform.GetComponent();
        // TxtCurrentTime = GetComponent ();
    }

    // Update is called once per frame
    void Update()
    {
        //获取系统当前时间
        System.DateTime NowTime = System.DateTime.Now.ToLocalTime();
        Text.text = NowTime.ToString("HH:mm");
    }
}