[MenuItem("Tools/导出精灵")]

    static void SaveSprite()

    {

        //每一张贴图类型Advanced下 Read/Write Enabled打上勾才能进行文件读取

        string resourcesPath = @"Assets/Resources/";

        foreach (Object obj in Selection.objects)

        {

            string selectionPath = AssetDatabase.GetAssetPath(obj);

            // 必须最上级是"Assets/Resources/"

            if (selectionPath.StartsWith(resourcesPath))

            {

                //获取文件后罪名.png

                string selectionExt = System.IO.Path.GetExtension(selectionPath);

                if (selectionExt.Length == ) continue;

                // 从路径"Assets/Resources/UI/testUI.png"得到路径"UI/testUI"

                string loadPath = selectionPath.Remove(selectionPath.Length - selectionExt.Length);

                loadPath = loadPath.Substring(resourcesPath.Length);

                //加载此文件下的所有资源

                Sprite [] spriteList = Resources.LoadAll<Sprite>(loadPath);

                if(spriteList.Length > )

                {

                    //创建导出文件夹

                    string outPath = Application.dataPath + "/outSprite/" + loadPath;

                    System.IO.Directory.CreateDirectory(outPath);

                    foreach (var sprite in spriteList)

                    {

                        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();

                        //写出成png文件

                        System.IO.File.WriteAllBytes(outPath + "/" + sprite.name + ".png",tex.EncodeToPNG());

                        Debug.Log("SaveSprite to" + outPath);

                    }

                    Debug.Log("保存图片完毕!" + outPath);

                }

            }

        }

    }