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

/// <summary>
/// 读写Text
/// </summary>
public class ReadWriteText {
    private static ReadWriteText instances;
    public static ReadWriteText Instances
    {
        get {
            if (instances==null)
            {
                return instances = new ReadWriteText() ;
            }
            return instances;
        }
    }
    public ReadWriteText()
    {
        path = Application.persistentDataPath + "/Text.txt";
    }

    /// <summary>
    /// 获取文本的数据
    /// </summary>
    public string content;
    StreamWriter sw;
    string path;

    /// <summary>
    /// 读取文本
    /// </summary>
    public string ReadText()
    {
        if (File.Exists(path))
        {
            content = string.Empty;
            content = File.ReadAllText(path);
        }
        return content;
    }

    /// <summary>
    /// 写入文本
    /// 写入之前先读取原来的文本
    /// 如果要追加数据 参数 = content + 添加的字符串
    /// 如果要更新（比如删除）参数 = 删除后的数据
    /// </summary>
    public void WriteText(string str)
    {
        FileInfo fileInfo = new FileInfo(path);
        if (File.Exists(path))
        {
            fileInfo.Delete();
        }
        if (!File.Exists(path))
        {
            sw = fileInfo.CreateText();
        }
        else
        {
            sw = fileInfo.AppendText();
        }
        sw.Write(str, Encoding.UTF8);
        sw.Close();
        sw.Dispose();
    }
}