public string AssetCachesDir
    {
        get
        {
            string dir = "";
#if UNITY_EDITOR
            dir = Application.dataPath + "Caches/";//路徑：/AssetsCaches/
#elif UNITY_IOS
            dir = Application.temporaryCachePath + "/";//路徑：Application/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Library/Caches/
 

#elif UNITY_ANDROID
            dir = Application.persistentDataPath + "/";//路徑：/data/data/xxx.xxx.xxx/files/
#else
            dir = Application.streamingAssetsPath + "/";//路徑：/xxx_Data/StreamingAssets/
#endif
            return dir;
        }
    }