unity实现读取文件夹中的图片（用户可自行更新和添加图片）

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.UI;
public class PuzzleManager : MonoBehaviour {
    
    
    private static PuzzleManager instance;
    public static PuzzleManager Instance
    {
    
    
        get
        {
    
    
            return instance;
        }

        set
        {
    
    
            instance = value;
        }
    }
    private List<Texture2D> images = new List<Texture2D>(); //存放读取到的图片   
    private void Awake()
    {
    
    
        instance = this;
        DontDestroyOnLoad(this);
    }
    void Start () {
    
    
        Load();
    }
    //加载文件夹下的图片
    void Load()
    {
    
    
        List<string> imgPaths = new List<string>();//存放图片路径
        string imgtype = "*.jpg|*.png";
        string[] Imagetype = imgtype.Split('|');   //把图片类型存在数组里
        for (int i = 0; i < Imagetype.Length; i++)
        {
    
    
           //获取application.datapath文件夹下所有的图片路径
            string[] dirs = Directory.GetFiles((Application.dataPath + "/StreamingAssets/Textures/"), Imagetype[i]);
            for (int j = 0; j <dirs.Length; j++)
            {
    
    
                imgPaths.Add(dirs[j]);
            }
        }
        for (int i = 0; i < imgPaths.Count; i++)
        {
    
    
            Texture2D tx = new Texture2D(960,540);
            tx.LoadImage(getImageByte(imgPaths[i]));
            images.Add(tx);
        }

    }
    //根据图片路径返回图片的字节流byte[]
    private static byte[] getImageByte(string imagepath)
    {
    
    
        FileStream files = new FileStream(imagepath,FileMode.Open);
        byte[] imgByte = new byte[files.Length];
        files.Read(imgByte,0,imgByte.Length);
        files.Close();
        return imgByte;
    }
}