using UnityEngine;

using UnityEditor;

using System.Collections;

using System.Linq;

public class SpriteToPrefab

{

    /// <summary>

    /// Creates Sprites To Prefab

    /// </summary>

    [MenuItem("Assets/Create/Sprite转Prefab", false, )]

    public static void SelectObjectToPrefabs()

    {

        //是否允许独立文件夹;

        bool isSoloFolder = EditorUtility.DisplayDialog("创建选择?", "是否单个Sprite创建独立文件夹?", "独立", "共享");

        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();

            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);

            }

            //创建对象;

            GameObject gameObject = new GameObject();

            //添加SpriteRenderer组件;

            SpriteRenderer spriteRenderer = gameObject.AddComponent<SpriteRenderer>();

            for (int j = ; j < sprites.Length; j++)

            {   //进度条;

                string pgTitle = (i + ).ToString() + "/" + Selection.objects.Length + " 开始创建Prefab";

                string info = "Prefab: " + j + "->" + sprites[j].name;

                float nowProgress = (float) j/(float) sprites.Length;

                EditorUtility.DisplayProgressBar(pgTitle,info ,nowProgress );

                //对象名称;

                gameObject.name = sprites[j].name;

                //绑定具体Sprite;

                spriteRenderer.sprite = sprites[j];

                //判断保存路径;

                string savePath = isSoloFolder ? fullFolderPath + "/" + sprites[j].name + "/" + sprites[j].name + ".prefab" : fullFolderPath + "/" + sprites[j].name + ".prefab";

                if (isSoloFolder)

                {   //创建单个Sprite独立的文件夹;

                    if (!AssetDatabase.IsValidFolder(fullFolderPath + "/" + sprites[j].name))

                    {

                        AssetDatabase.CreateFolder(fullFolderPath, sprites[j].name);

                    }

                }

                //生成预制体;

                PrefabUtility.CreatePrefab(savePath, gameObject);

            }

            GameObject.DestroyImmediate(gameObject);

        }

        //释放进度条;

        EditorUtility.ClearProgressBar();

    }

    /// <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);

    }

}