Unity实现毫秒延时回调功能

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

public class TickManager : MonoBehaviour
{
    // Start is called before the first frame update
    public int NOW;
    private List<Tick> _ticks = new List<Tick>();
    private void Update()
    {
        //测试--手动创建一个5秒后的回调
        if (Input.GetKeyDown(KeyCode.A))
        {
            Tick tick = new Tick(() =>
            {
                Debug.Log("任务执行");
            },5000,NOW);
            _ticks.Add(tick);
        }
        //每帧所使用的毫秒时间
        uint deltaTime = (uint)(Time.deltaTime * 1000);
        //遍历判断集合中的任务是否执行
        for (int i = 0; i < deltaTime; i++)
        {
            Debug.Log("帧数 " + NOW);

            for (int j = 0; j < _ticks.Count; j++)
            {
                _ticks[j].OnTick(NOW);
            }
            ++NOW;
        }
 
    }


    class Tick
    {
        //创建任务的时间
        public int currentTime { get; set; }
        //需要延迟的时间
        public int delayTime { get; set; }
        //延迟后的回调事件
        public Action action { get; set; }

        //构造函数--初始化
        public Tick(Action ac, int del, int now)
        {
            action = ac;
            delayTime = del;
            currentTime = now;
        }
        //判断该任务是否执行
        public void OnTick(int now)
        {
            if (now >= (currentTime + delayTime))
            {
                action();
            }
            else
            {
                Debug.Log("时间还未到 "+ now);
            }
        }
    }
}