1、效果图：

2、代码：

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.UI;
using System;
using System.Text.RegularExpressions;

public class CaptionManager : MonoBehaviour
{
    //用来显示字幕的TextUi
    public Text Titles;
    //文件流,用于读取文本
    StreamReader sr;
    //文本中的字幕的行数
    int lineCount = 0;
    bool ison;
    int videotime;
    int listcount;
    //先读取到unity里面在进行后面的操作
    public List<string> video0 = new List<string>();
    public List<int> video0starttime = new List<int>();
    public List<int> video0endtime = new List<int>();
    public List<string> video1 = new List<string>();
    public List<string> video2 = new List<string>();
    public List<string> video3= new List<string>();
    //地址
    string path = "/VideoAndAudio/taici/panduan0.txt";
    string path1 = "/VideoAndAudio/taici/panduan1.txt";
    string path2 = "/VideoAndAudio/taici/panduan2.txt";
    string path3 = "/VideoAndAudio/taici/panduan3.txt";
    void Start()
    {
        LoadText(path, video0);
        LoadText(path1, video1);
        LoadText(path2, video2);
        LoadText(path3, video3);
    }
    private void Update()
    {        
       if(Input.GetKeyDown(KeyCode.Space))
        {
            StartCoroutine(ShowText(video0));
        }
    }

    public void Show(List<string> vide)
    {
        for (int i = 0; i < vide.Count; i++)
        {
            string tempText = vide[i];
            //没有用null，是因为用null老是隔行读取，读取不完整,发现用（""）就可以
            if (tempText != "")
            {
            //检查tempText 是否包含‘|’
                string SS = "|";
                bool II = tempText.Contains(SS);
                if (II)
                {
                    //分割开
                    string str = tempText.Split('|')[0];
                    int start = int.Parse((tempText.Split('|')[1]));
                    int end = int.Parse((tempText.Split('|')[2]));
                    video0starttime.Add(start);
                    video0endtime.Add(end);
                }
                else
                {
                    Debug.Log("文本格式不对");
                }
            }
        }
       
    }
    IEnumerator ShowText(List<string> vide0)
    {
        for (int i = 0; i < vide0.Count; i++)
        {
            string tempText = vide0[i];
            if (tempText != "")
            {
                string SS = "$";
                bool II = tempText.Contains(SS);
                if(II)
                {
                    string str = tempText.Split('$')[0];
                    float time;
                    Titles.text = str;
                    if (float.TryParse(tempText.Split('$')[1], out time))
                    {
                        yield return new WaitForSeconds(time);
                    }
                }
                else
                {
                    Debug.Log("文本格式不对");
                    break;
                }             
            }
        }
    }
    public void LoadText(string paths,List<string> videotici)
    {
        string path = Application.dataPath + paths;
        FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None);
        //TXT保存的也要选择UTF8格式
        StreamReader srLine = new StreamReader(fs,System.Text.Encoding.UTF8);
        while(srLine.Peek()!=-1)
        {
            string strs = srLine.ReadLine().Trim();
            if (strs != "")
            {
                videotici.Add(strs);
                lineCount++;
            }
        }  
        srLine.Close();
        srLine.Dispose();
        
    }

}

3、TXT保存格式：