Unity Sprite切割导出

这次需要将美术提供的Sprite图集切割导出，整体思路依然和上次的Sprite转prefab一致，只是在转prefab的逻辑修改为了创建Texture的逻辑。

过程很简单，直接看最终代码结果：

using System.IO;
using UnityEngine;
using UnityEditor;
using System.Linq;

public class SpriteToSplit  {

    /// <summary>
    /// 切割Sprite导出单个对象
    /// </summary>
    [MenuItem("Assets/Create/SpriteSplit2Export", false, )]
    public static void SpriteChildToExport()
    {
        for (int i = ; i < Selection.objects.Length; i++)
        {
            //获得选择对象路径;
            string spritePath = AssetDatabase.GetAssetPath(Selection.objects[i]);
            //所有子Sprite对象;
            Sprite[] sprites = AssetDatabase.LoadAllAssetsAtPath(spritePath).OfType<Sprite>().ToArray();
            if (sprites.Length < )
            {
                EditorUtility.DisplayDialog("错误", "当前选择文件不是Sprite!", "确认");
                Debug.LogError("Sorry,There is not find sprite!");
                return;
            }
            string[] splitSpritePath = spritePath.Split(new char[] { '/' });
            //文件夹路径 通过完整路径再去掉文件名称即可;
            string fullFolderPath = Inset(spritePath, , splitSpritePath[splitSpritePath.Length - ].Length + ) + "/" + Selection.objects[i].name;
            //同名文件夹;
            string folderName = Selection.objects[i].name;
            string adjFolderPath = InsetFromEnd(fullFolderPath, Selection.objects[i].name.Length + );
            //验证路径;
            if (!AssetDatabase.IsValidFolder(fullFolderPath))
            {
                AssetDatabase.CreateFolder(adjFolderPath, folderName);
            }

            for (int j = ; j < sprites.Length; j++)
            {   //进度条;
                string pgTitle = (i + ).ToString() + "/" + Selection.objects.Length + " 开始导出Sprite";
                string info = "当前Srpte: " + j + "->" + sprites[j].name;
                float nowProgress = (float)j / (float)sprites.Length;
                EditorUtility.DisplayProgressBar(pgTitle, info, nowProgress);
                //创建Texture;
                Sprite sprite = sprites[j];
                Texture2D tex = new Texture2D((int)sprite.rect.width, (int)sprite.rect.height, sprite.texture.format, false);
                tex.SetPixels(sprite.texture.GetPixels((int)sprite.rect.xMin, (int)sprite.rect.yMin,
                    (int)sprite.rect.width, (int)sprite.rect.height));
                tex.Apply();
                //判断保存路径;
                string savePath = fullFolderPath + "/" + sprites[j].name + ".png";
                //生成png;
                File.WriteAllBytes(savePath,tex.EncodeToPNG());
            }
            //释放进度条;
            EditorUtility.ClearProgressBar();
            //刷新资源，不然导出后你以为没导出，还要手动刷新才能看到;
            AssetDatabase.Refresh();
        }

    }

    /// <summary>
    /// 截取路径
    /// </summary>
    /// <param name="path"></param>
    /// <param name="leftIn">左起点</param>
    /// <param name="rightIn">右起点</param>
    /// <returns></returns>
    public static string Inset(string path, int leftIn, int rightIn)
    {
        return path.Substring(leftIn, path.Length - rightIn - leftIn);
    }

    /// <summary>
    /// 截取路径
    /// </summary>
    /// <param name="path"></param>
    /// <param name="inset"></param>
    /// <returns></returns>
    public static string InsetFromEnd(string path, int inset)
    {
        return path.Substring(, path.Length - inset);
    }
}

使用方法如下图：