Unity切割图集转换为多张图片

using UnityEngine;
using System.Collections;
using UnityEditor;
using System.IO;
using System.Collections.Generic;
/// <summary>
/// 切割
/// </summary>
public static class ImageSlicer
{
  [MenuItem("Assets/ImageSlicer/Process to Sprites")]
  static void ProcessToSprite()
  {
    Texture2D image = Selection.activeObject as Texture2D;//获取旋转的对象
    string rootPath = Path.GetDirectoryName(AssetDatabase.GetAssetPath(image));//获取路径名称
    string path = rootPath + "/" + image.name + ".PNG";//图片路径名称


    TextureImporter texImp = AssetImporter.GetAtPath(path) as TextureImporter;//获取图片入口


    AssetDatabase.CreateFolder(rootPath, image.name);//创建文件夹


    foreach (SpriteMetaData metaData in texImp.spritesheet)//遍历小图集
    {
      Texture2D myimage = new Texture2D((int)metaData.rect.width, (int)metaData.rect.height);

      //abc_0:(x:2.00, y:400.00, width:103.00, height:112.00)
      for (int y = (int)metaData.rect.y; y < metaData.rect.y + metaData.rect.height; y++)//Y轴像素
      {
        for (int x = (int)metaData.rect.x; x < metaData.rect.x + metaData.rect.width; x++)
          myimage.SetPixel(x - (int)metaData.rect.x, y - (int)metaData.rect.y, image.GetPixel(x, y));
      }


      //转换纹理到EncodeToPNG兼容格式
      if (myimage.format != TextureFormat.ARGB32 && myimage.format != TextureFormat.RGB24)
      {
        Texture2D newTexture = new Texture2D(myimage.width, myimage.height);
        newTexture.SetPixels(myimage.GetPixels(0), 0);
        myimage = newTexture;
      }
      var pngData = myimage.EncodeToPNG();


      //AssetDatabase.CreateAsset(myimage, rootPath + "/" + image.name + "/" + metaData.name + ".PNG");
      File.WriteAllBytes(rootPath + "/" + image.name + "/" + metaData.name + ".PNG", pngData);
      // 刷新资源窗口界面
      AssetDatabase.Refresh();
    }
  }
}