unity 加载图片文件

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图片文件自动设置为Sprite
添加文件时，自动添加到列表
删除文件时，自动从列表删除

使用方式

using System.Collections.Generic;using UnityEngine;public class Test : MonoBehaviour {    public Dictionary<string, Sprite> spriteDic = new Dictionary<string, Sprite>();    private void Awake(){        var spriteList = Resources.Load<SpriteAsset>("Assets/SpriteAsset").SpriteList;        int count = spriteList.Count;        for(int i = 0; i < count; i++)        {            spriteDic.Add(spriteList[i].name, spriteList[i]);        }        Debug.Log(spriteDic["3"]);    }}

该文件名字必须为SpriteAsset

using System.Collections.Generic;using UnityEngine; public class SpriteAsset : ScriptableObject{    public List<Sprite> SpriteList;}

using System.Collections.Generic;using UnityEditor;using UnityEngine;using System.IO; public class CreateSprite : AssetPostprocessor {    private static bool isChanaged = false;    private static new string assetPath = "Assets/Resources/Assets/SpriteAsset.asset";    /*private static string[] suffixs = new string[]    {        ".gif", ".jpg", ".png",        ".bmp", ".jpeg", ".psd",        ".tiff", ".tga", ".iff", ".pict"    };*/    [MenuItem("Tool/Load")]    static void create()    {        SpriteAsset data =  ScriptableObject.CreateInstance<SpriteAsset>();        //data.SpriteList = GetAllSprite();        data.SpriteList = new List<Sprite>(Resources.LoadAll<Sprite>(""));        int index = assetPath.LastIndexOf('/');        Directory.CreateDirectory(assetPath.Remove(index,assetPath.Length-index));        AssetDatabase.CreateAsset(data, assetPath);    }    private void OnPreprocessTexture()    {        TextureImporter impor = this.assetImporter as TextureImporter;        impor.textureType = TextureImporterType.Sprite;        impor.spriteImportMode = SpriteImportMode.Single;    }    public static void OnPostprocessAllAssets(        string[] add,string[] deleted,string[] moved,string[]movedFrom)    {        var asset = AssetDatabase.LoadAssetAtPath<SpriteAsset>(assetPath);        if(asset==null)        {            create();            return;        }        foreach (var path in add)        {            var sprite= AssetDatabase.LoadAssetAtPath<Sprite>(path);            if (sprite != null)            {                isChanaged = true;                asset.SpriteList.Add(sprite);            }        }        foreach(var path in deleted)        {            var sprite = AssetDatabase.LoadAssetAtPath<Sprite>(path);            if (asset.SpriteList.Remove(sprite))            {                isChanaged = true;            }        }        if (isChanaged)        {            isChanaged = false;            UpAsset(asset.SpriteList);        }    }    private static void UpAsset(List<Sprite> list)    {        var asset = ScriptableObject.CreateInstance<SpriteAsset>();        asset.SpriteList = list;        AssetDatabase.CreateAsset(asset, assetPath);    }        /*    private static List<Sprite> GetAllSprite()    {        List<Sprite> list = new List<Sprite>();        DirectoryInfo direction = new DirectoryInfo("Assets");        FileInfo[] files = direction.GetFiles("*", SearchOption.AllDirectories);        int index = Application.dataPath.IndexOf("Assets");        foreach(FileInfo info in files)        {            foreach (var suffix in suffixs)            {                if (info.Name.EndsWith(suffix))                {                    var currentPath = info.FullName.Remove(0, index);                    var sprite = AssetDatabase.LoadAssetAtPath<Sprite>(currentPath);                    list.Add(sprite);                }            }        }        return list;    }*/}

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