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"));  
		}  
	}  
}