Unity中常用的幾種讀取本地文件方式

使用的命名空間如下

using LitJson;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;
using UnityEngine.Networking;

1、通過UnityWebRequest獲取本地StreamingAssets文件夾中的Json文件

      /// <summary>
    /// 通過UnityWebRequest獲取本地StreamingAssets文件夾中的Json文件
    /// </summary>
    /// <param name="fileName">文件名稱</param>
    /// <returns></returns>
    public string UnityWebRequestJsonString(string fileName)
    {
        string url;

        #region 分平台判斷 StreamingAssets 路徑
        //如果在編譯器 或者 單機中  ……
#if UNITY_EDITOR || UNITY_STANDALONE

        url = "file://" + Application.dataPath + "/StreamingAssets/" + fileName;
        //否則如果在Iphone下……
#elif UNITY_IPHONE

            url = "file://" + Application.dataPath + "/Raw/"+ fileName;
            //否則如果在android下……
#elif UNITY_ANDROID
            url = "jar:file://" + Application.dataPath + "!/assets/"+ fileName;
#endif
        #endregion
        UnityWebRequest request = UnityWebRequest.Get(url);
        request.SendWebRequest();//讀取數據
        while (true)
        {
            if (request.downloadHandler.isDone)//是否讀取完數據
            {
                return request.downloadHandler.text;
            }
        }
    }
```

2、通過UnityWebRequest和StreamReader讀取本地StreamingAssets文件夾中的Json文件

     /// <summary>
    /// 通過UnityWebRequest和StreamReader讀取本地StreamingAssets文件夾中的Json文件
    /// </summary>
    /// <param name="jsonName">json文件名</param>
    /// <returns></returns>
    public string StreamReaderJsonFromSSPath(string jsonName)
    {
        string url;
        #region 分平台判斷 StreamingAssets 路徑
        //如果在編譯器 或者 單機中  ……
#if UNITY_EDITOR || UNITY_STANDALONE
        url = Application.dataPath + "/StreamingAssets/" + jsonName;
        //否則如果在Iphone下……
#elif UNITY_IPHONE

            url = Application.dataPath + "/Raw/"+ fileName;
            //否則如果在android下……
#elif UNITY_ANDROID
            url =  Application.dataPath + "!/assets/"+ fileName;
#endif
        #endregion
        UnityWebRequest webRequest = UnityWebRequest.Get(url);
        webRequest.SendWebRequest();//讀取數據
        while (true)
        {
            if (webRequest.isNetworkError)
            {
                Debug.LogError(url + "請求錯誤：" + webRequest.error);
            }
            else
            {
                if (webRequest.downloadHandler.isDone)//是否讀取完數據
                {
                    //讀取
                    Encoding endoning = Encoding.GetEncoding("utf-8");//識別Json數據內容中文字段
                    StreamReader streamReader = new StreamReader(url, endoning);
                    string str = streamReader.ReadToEnd();
                    streamReader.Close();
                    return str;
                }
            }
        }
    }

 

3、通過StreamReader讀取本地StreamingAssets文件夾中的Json文件 

      /// <summary>
    /// 通過UnityWebRequest獲取本地StreamingAssets文件夾中的Json文件
    /// </summary>
    /// <param name="fileName">文件名稱</param>
    /// <returns></returns>
    public string UnityWebRequestJsonString(string fileName)
    {
        string url;

        #region 分平台判斷 StreamingAssets 路徑
        //如果在編譯器 或者 單機中  ……
#if UNITY_EDITOR || UNITY_STANDALONE

        url = "file://" + Application.dataPath + "/StreamingAssets/" + fileName;
        //否則如果在Iphone下……
#elif UNITY_IPHONE

            url = "file://" + Application.dataPath + "/Raw/"+ fileName;
            //否則如果在android下……
#elif UNITY_ANDROID
            url = "jar:file://" + Application.dataPath + "!/assets/"+ fileName;
#endif
        #endregion
        UnityWebRequest request = UnityWebRequest.Get(url);
        request.SendWebRequest();//讀取數據
        while (true)
        {
            if (request.downloadHandler.isDone)//是否讀取完數據
            {
                return request.downloadHandler.text;
            }
        }
    }
```

 4、通過FileStream讀取本地StreamingAssets文件夾中的文件

    /// <summary>
    /// 通過FileStream讀取本地StreamingAssets文件夾中的文件
    /// </summary>
    /// <param name="jsonName"></param>
    /// <returns></returns>
    public string GetAllFileInfos(string jsonName)
    {
        string jsonPath = Application.streamingAssetsPath + "/" + jsonName;
        try
        {
            using (FileStream fs = new FileStream(jsonPath, FileMode.Open, FileAccess.Read))
            {
                fs.Seek(0, SeekOrigin.Begin);
                var bytes = new byte[fs.Length];
                fs.Read(bytes, 0, (int)fs.Length);
                string jsonData = Encoding.UTF8.GetString(bytes);
                fs.Flush();
                fs.Dispose();
                fs.Close();
                return jsonData;
            }
            //Debug.Log("所有文件資源信息Assets下文件夾數量：" + fileInfos.Count);
        }
        catch (Exception e)
        {
            Debug.LogError(e.Message);
            Debug.LogError("文件讀取異常：" + jsonPath);
            return string.Empty;
        }
    }

參考資源：https://www.cnblogs.com/unity3ds/p/11742487.html](https://www.cnblogs.com/unity3ds/p/11742487.html

轉載鏈接：https://blog.csdn.net/U3DCoder/article/details/115464140