Unity3d- 资源

浏览数：22 / 时间：2015年06月08日

Data与Resources文件夹
一般只读文件放到Resources目录
Data用于新建的文件或者要修改的文件
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Unity默认的Resource加载
　　保存和读取资源的最简单的方式了。但是如果想让资源在编译后不改变，只能这样做。
　　因为这里面的内容会组合并编译到resource.assets文件（此文件可以在编译过的游戏的Data文件中找到）
　　可以从编译过的项目文件Resource.assets中去加载

用法
　　//Texture2D （Texture2D）Resouce.Load(fileName);
　　//文本资源（TextAsset)Resouce.Load("ddd");
　　读取文本内容 TestAsset.text
　　//声音 (AudioClip)Resouce.Load();

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加载编译之后的文件

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

public class temp : MonoBehaviour
{
    private string fileName = "a.jpg";
    private string url;
    private Texture2D externalImage;
    // Use this for initialization
    void Start()
    {
        url = "file:" + Application.dataPath;
        url = Path.Combine(url, "Resources");
        url = Path.Combine(url, fileName);

        StartCoroutine(LoadWWW());
    }

    private IEnumerator LoadWWW()
    {
        yield return 0;
        WWW www=new WWW(url);
        yield return www;
        externalImage = www.texture;
    }
    // Update is called once per frame
    void Update()
    {

    }
}

需要System.IO类
www类的对象时以“file:"开头的URL，
使用Path.Combine()而不是 ”\ /“以避免跨平台的问题

WWW和资源内容
WWW类定义了几个不同的属性和方法用于把下载的资源文件数据提取到变量中
.text 只读 web数据作为string类型返回
.texture 只读作为Texture2D类型返回
.GetAudioClip() 方法作为AudioClip对象类型返回

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通过从互联网下载文件与加载外部资源文件
从服务器下载

using UnityEngine;
using System.Collections;

public class temp : MonoBehaviour
{
    private string url="http://www.packtpub.com/sites/default/files/packt_logo.png";
    private Texture2D externalImage;
    // Use this for initialization
    void Start()
    {
        StartCoroutine(LoadWWW());
    }

    private void OnGUI()
    {
        GUILayout.Label("url="+url);
        GUILayout.Label(externalImage);
    }
    private IEnumerator LoadWWW()
    {
        yield return 0;
        WWW imageFile=new WWW(url);
        yield return imageFile;
        externalImage = imageFile.texture;
    }
    // Update is called once per frame
    void Update()
    {

    }
}

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使用外部文本文件和XML数据
最简单的是TextAsset 共有变量（编译后数据文件不再改变的情况下适用）

 public TextAsset DataTestAsset;
    private string textData;

    void Start()
    {
        textData = DataTestAsset.text;
    }

C#文件流加载外部文本文件

using System;
using UnityEngine;
using System.Collections;
using System.IO;
public class FileReadWriteManager
{
    public void WriteTextFile(string pathAndName, string stringData)
    {
        //remove file ,if exists
        FileInfo textFile=new FileInfo(pathAndName);
        if (textFile.Exists)
        {
            textFile.Delete();
        }
        //create new empty file
        StreamWriter writer;
        writer = textFile.CreateText();
        //write text to file
        writer.Write(stringData);
        writer.Close();
    }

    public string ReadTextFile(string pathAndName)
    {
        string dataAsString = "";
        try
        {
            //open text file
            StreamReader textReader = File.OpenText(pathAndName);
            //read content
            dataAsString = textReader.ReadToEnd();
            textReader.Close();
        }
        catch (Exception e)
        {
            
        }
        return dataAsString;
    }
}

调用示例

private string fileName = "cities.txt";
    private string filePath = "";
    private FileReadWriteManager fileReadWriteManager=new FileReadWriteManager();
    void Start()
    {
        filePath = Path.Combine(Application.dataPath, "Resources");
        filePath = Path.Combine(filePath, fileName);
        string textContent = fileReadWriteManager.ReadTextFile(filePath);
    }

 private string fileName = "hello.txt";
    private string foleName = "Data";
    //需要在Project面板中创建一个Data目录文件夹
    private string filePath = "";
    private FileReadWriteManager fileReadWriteManager=new FileReadWriteManager();
    void Start()
    {
        filePath = Application.dataPath + Path.DirectorySeparatorChar + fileName;
        string textData = "abc\n def";

        fileReadWriteManager.WriteTextFile(filePath, textData);
        filePath = Path.Combine(filePath, fileName);
        string textContent = fileReadWriteManager.ReadTextFile(filePath);
    }