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关键代码：Application.RegisterLogCallback(logCallBack);

using UnityEngine;using System.IO;public class Logger{    string fullPath;    public void InitLogger()    {        fullPath = Application.dataPath + "/output.txt";        if (File.Exists(fullPath)) File.Delete(fullPath);        Debug.Log(fullPath.Replace("/output.txt", ""));        if (Directory.Exists(fullPath.Replace("/output.txt", "")))        {            FileStream fs = File.Create(fullPath);            fs.Close();            Application.logMessageReceived += logCallBack;        }        else        {            Debug.LogError("directory is not exist");        }    }    private void logCallBack(string condition, string stackTrace, LogType type)    {        if (File.Exists(fullPath))        {            using (StreamWriter sw = File.AppendText(fullPath))            {                sw.WriteLine(condition);                sw.WriteLine(stackTrace);            }        }    }    private static Logger s_instance;    public static Logger instance    {        get        {            if (null == s_instance)                s_instance = new Logger();            return s_instance;        }    }}

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