unity 动态加载图片_unity动态加载图片

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using UnityEngine.UI;
using System.Reflection;

public class Open : MonoBehaviour
{

    private List<Texture2D> images = new List<Texture2D>();
    private List<Sprite> spr = new List<Sprite>();
    public Image Img1;
    private int _index = 0;
    void Awake()
    {
        _index = 0;
    }
    void Start()
    {
        load();
        Img1.sprite = spr[_index];
    }
   
    /// <summary>
    /// 加载文件夹内图片
    /// </summary>
    void load()
    {
        List<string> filePaths = new List<string>();

        string imgtype = "*.BMP|*.JPG|*.GIF|*.PNG";
        string[] ImageType = imgtype.Split('|');

        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.streamingAssetsPath + "/Image/"+), ImageType[i]);



            for (int j = 0; j < dirs.Length; j++)
            {
                filePaths.Add(dirs[j]);
                Debug.Log(dirs[j]);

            }
        }

        for (int i = 0; i < filePaths.Count; i++)
        {
            Texture2D tx = new Texture2D(100, 100);
            tx.LoadImage(getImageByte(filePaths[i]));
            images.Add(tx);
            Sprite sprite = Sprite.Create(images[i], new Rect(0, 0, images[i].width, images[i].height), Vector2.zero);
            spr.Add(sprite);
        }
    }

    /// <summary>  
    /// 根据图片路径返回图片的字节流byte[]  
    /// </summary>  
    /// <param name="imagePath">图片路径</param>  
    /// <returns>返回的字节流</returns>  
    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;
    }




}
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