Unity中C# 文件本地读取，本地保存等实例

using UnityEngine;
using System.Collections;
using System.IO;
using System;

public class FileReadWrite : MonoBehaviour {

//不同平台下StreamingAssets的路径是不同的，这里需要注意一下。
public static readonly string PathURL =
#if UNITY_ANDROID   //安卓
"jar:file://" + Application.dataPath + "!/assets/";
#elif UNITY_IPHONE  //iPhone
Application.dataPath + "/Raw/";
#elif UNITY_STANDALONE_WIN || UNITY_EDITOR  //windows平台和web平台
"file://" + Application.dataPath + "/StreamingAssets/";
#else
string.Empty;
#endif

//切记，你的二进制文件一定要放在StreamingAssets ！！！！！！
#if UNITY_EDITOR
string filepath = Application.dataPath +"/StreamingAssets"+"/my.xml";
#elif UNITY_IPHONE
string filepath = Application.dataPath +"/Raw"+"/my.xml";
#elif UNITY_ANDROID
string filepath = "jar:file://" + Application.dataPath + "!/assets/"+"/my.xml;
#endif

//文本中每行的内容
ArrayList infoall;
//皮肤资源，这里用于显示中文
public GUISkin skin;
void Start ()
{
Debug.Log("当前文件路径:"+Application.persistentDataPath);
//删除文件
DeleteFile(Application.persistentDataPath,"FileName.txt");
//创建文件，共写入3次数据
CreateFile(Application.persistentDataPath,"FileName.txt","dingxiaowei");
CreateFile(Application.persistentDataPath,"FileName.txt","丁小未");
//CreateFile(Application.persistentDataPath ,"Filename.assetbundle","丁小未");
//下载模型
StartCoroutine(loadasset("http://192.168.1.180/3DShowResource/Products/AssetBundles/HX_DY02.assetbundle"));
//得到文本中每一行的内容
infoall = LoadFile(Application.persistentDataPath,"FileName.txt");

}

//写入模型到本地
IEnumerator loadasset(string url)
{
WWW w = new WWW(url);
yield return w;
if (w.isDone)
{
byte[] model = w.bytes;
int length = model.Length;
//写入模型到本地
CreateModelFile(Application.persistentDataPath, "Model.assetbundle", model,length);
}
}

void CreateModelFile(string path, string name, byte[] info, int length)
{
//文件流信息
//StreamWriter sw;
Stream sw;
FileInfo t = new FileInfo(path + "//" + name);
if (!t.Exists)
{
//如果此文件不存在则创建
sw = t.Create();
}
else
{
//如果此文件存在则打开
//sw = t.Append();
return;
}
//以行的形式写入信息
//sw.WriteLine(info);
sw.Write(info, 0, length);
//关闭流
sw.Close();
//销毁流
sw.Dispose();
}

/**
* path：文件创建目录
* name：文件的名称
*  info：写入的内容
*/
void CreateFile(string path,string name,string info)
{
//文件流信息
StreamWriter sw;
FileInfo t = new FileInfo(path+"//"+ name);
if(!t.Exists)
{
//如果此文件不存在则创建
sw = t.CreateText();
}
else
{
//如果此文件存在则打开
sw = t.AppendText();
}
//以行的形式写入信息
sw.WriteLine(info);
//关闭流
sw.Close();
//销毁流
sw.Dispose();
}

/**
* 读取文本文件
* path：读取文件的路径
* name：读取文件的名称
*/
ArrayList LoadFile(string path,string name)
{
//使用流的形式读取
StreamReader sr =null;
try{
sr = File.OpenText(path+"//"+ name);
}catch(Exception e)
{
//路径与名称未找到文件则直接返回空
return null;
}
string line;
ArrayList arrlist = new ArrayList();
while ((line = sr.ReadLine()) != null)
{
//一行一行的读取
//将每一行的内容存入数组链表容器中
arrlist.Add(line);
}
//关闭流
sr.Close();
//销毁流
sr.Dispose();
//将数组链表容器返回
return arrlist;
}

//读取模型文件
IEnumerator LoadModelFromLocal(string path, string name)
{
string s = null;
#if UNITY_ANDROID
s = "jar:file://"+path+"/"+name;
#elif UNITY_IPHONE
s = path+"/"+name;
#elif UNITY_STANDALONE_WIN || UNITY_EDITOR
s = "file://"+path+"/"+name;
#endif
WWW w = new WWW(s);
yield return w;
if (w.isDone)
{
Instantiate(w.assetBundle.mainAsset);
}
}

/**
* path：删除文件的路径
* name：删除文件的名称
*/

void DeleteFile(string path,string name)
{
File.Delete(path+"//"+ name);
}

void OnGUI()
{
//用新的皮肤资源，显示中文
GUI.skin = skin;
//读取文件中的所有内容
foreach(string str in infoall)
{
//绘制在屏幕当中
GUILayout.Label(str);
}
if (GUILayout.Button("加载模型"))
{
StartCoroutine(LoadModelFromLocal(Application.persistentDataPath, "Model.assetbundle"));
}
}
}