Unity 添加视频和图片在一个文件夹里，可以顺序播放，视频进度条程序可更改

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using UnityEngine.Video;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System;

public class Main : MonoBehaviour {

    [Header("视频")]
    public VideoPlayer vid;
    public Slider mySlider;
    public GameObject playBtn;
    public GameObject di;
    public RawImage vidRawimg;
    private string playName;

   // public List<string> vidList = new List<string>();
  //  public List<string> spList = new List<string>();
    public List<string> pathList = new List<string>();

    public RawImage Rawimage;
    public Button nextBtn;
    public Button prevBtn;
    private int stepNum = 0;
    private FileInfo[] floders;




    private WWW www;
    private Texture2D texture;
    private string ifLoaderVid;//是否已经预制加载；
    private string ifPlusOr;//是增加还是减少

    //视频预加载
    private string pathStr1;
    private int lastIndex1;
    private string sliceJPGOrVid1;

    private IfMouseMove ifmouse;
    private void Awake() {
        string filePath = Application.dataPath + "/Vid";
        DirectoryInfo direction = new DirectoryInfo(filePath);
        floders = direction.GetFiles("*", SearchOption.TopDirectoryOnly);

        for (int i = 0; i < floders.Length; i++) {
           // if (i % 2 == 0) {
                string floderPath = floders[i].ToString();
                pathList.Add(floderPath);
         //   }
        }
    }
    private void Start() {
        mySlider.GetComponent<Slider>().onValueChanged.AddListener(SetValueChange);
        EventTriggerListener.Get(playBtn).onClick = onPlay;
        playName = playBtn.GetComponent<Image>().sprite.name;
        EventTriggerListener.Get(di).onEnter = onEnterFun;
        EventTriggerListener.Get(mySlider.gameObject).onEnter = onEnterFun;
        EventTriggerListener.Get(playBtn).onEnter = onEnterFun;
        EventTriggerListener.Get(di).onExit = onExitFun;
        playBtn.transform.localScale = new Vector2(0, 1);

        EventTrigger trigger = mySlider.gameObject.GetComponent<EventTrigger>();
        EventTrigger.Entry entry = new EventTrigger.Entry();
        // 鼠标点击事件
        entry.eventID = EventTriggerType.EndDrag;
        entry.callback = new EventTrigger.TriggerEvent();
        entry.callback.AddListener(OnClick);
        trigger.triggers.Add(entry);



        EventTriggerListener.Get(prevBtn.gameObject).onClick = prevFun;
        EventTriggerListener.Get(nextBtn.gameObject).onClick = nextFun;

        // image.GetComponent<Image>().sprite = spList[2];
        ifmouse = this.GetComponent<IfMouseMove>();
    }
    void nextFun(GameObject sender) {
        if (stepNum < floders.Length  - 1) {
            ifPlusOr = "plus";
            stepNum++;
            changeFun();
        }
    }
    void prevFun(GameObject sender) {
        if (stepNum > 0) {
            ifPlusOr = "cut";
            stepNum--;
            changeFun();
        }
    }

    private void changeFun() {
        ifmouse.timer = 0;
        playBtn.GetComponent<Image>().sprite = playBtn.GetComponent<InitImage>().stopImage;
        string pathStr = pathList[stepNum].ToString();
        int lastIndex = pathStr.LastIndexOf(".");
        string sliceJPGOrVid = pathStr.Substring(lastIndex + 1, 1);
     
        if (sliceJPGOrVid == "j") {
            if(ifPlusOr== "plus") {
                pathStr1 = pathList[stepNum + 1].ToString();
            } else if (ifPlusOr == "cut") {
                pathStr1 = pathList[stepNum - 1].ToString();
            }
            lastIndex1 = pathStr1.LastIndexOf(".");
            sliceJPGOrVid1 = pathStr1.Substring(lastIndex1 + 1, 1);
            //判断加载视频
            if (sliceJPGOrVid1 == "m") {
                vid.targetTexture.Release();
                vid.url = pathStr1;
                vid.SetDirectAudioMute(0, true);
                print("执行预制加载");
                ifLoaderVid = "finishLoader";
            }

            Rawimage.transform.parent.localScale = new Vector2(1, 1);
            www = new WWW(pathStr);
            texture = www.texture;
            Rawimage.texture = texture;
        } else if (sliceJPGOrVid == "m") {
            if(ifLoaderVid == "finishLoader") {
                ifLoaderVid = "";
                vid.Stop();
                vid.Play();
            } else {
                vid.url = pathStr;
            }
            Rawimage.transform.parent.localScale = new Vector2(0, 1);
            vid.SetDirectAudioMute(0, false);
        }
    }
    
    private void OnClick(BaseEventData pointData) {
        Debug.Log("Button Clicked. EventTrigger..");
        string name = playBtn.GetComponent<Image>().sprite.name;
        if (name == playName) {
            vid.Play();
        } else {
            vid.Pause();
        }
    }


    void moveFun() {
        float vidLength = (float)vid.length;//视频的总长度
        float vidTime = (float)vid.time;//视频的当前时长
        mySlider.value = vidTime / vidLength;
    }
    private void Update() {
        if (vid.isPlaying) {
           moveFun();
            if (vid.length - vid.time <= 0.05) {
                vid.Stop();
                vid.Play();
            }
        }
        if (Input.GetKeyDown(KeyCode.DownArrow)|| Input.GetKeyDown(KeyCode.RightArrow)) {
            if (stepNum < floders.Length -1) {
                ifPlusOr = "plus";
                stepNum++;
                changeFun();
            }
        } else if (Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown(KeyCode.LeftArrow)) {
            if (stepNum > 0) {
                ifPlusOr = "cut";
                stepNum--;
                changeFun();
            }
        }
    }

    
    private void SetValueChange(float value) {
        vid.time = mySlider.value * vid.length;
    }

    void onPlay(GameObject sender) {
        string name = playBtn.GetComponent<Image>().sprite.name;
        if (name == playName) {
            playBtn.GetComponent<Image>().sprite = playBtn.GetComponent<InitImage>().playImage;
            vid.Pause();
        } else {
            playBtn.GetComponent<Image>().sprite = playBtn.GetComponent<InitImage>().stopImage;
            vid.Play();
        }
    }
    void onEnterFun(GameObject sender) {
        playBtn.transform.localScale = new Vector2(1, 1);
    }
    void onExitFun(GameObject sender) {
        playBtn.transform.localScale = new Vector2(0, 1);
    }

  
}