来自于：Zero_LJ

前言

之前unity5.x在代码中写了debug.log..等等，打包之后在当前程序文件夹下会有个对应的”outlog.txt”,2017之后这个文件被移到C盘用户Appdata/LocalLow/公司名 文件夹下面。觉得不方便就自己写了个

代码

using UnityEngine;
using System.IO;
using System;
using System.Diagnostics;
using Debug = UnityEngine.Debug;
public class DebugTrace
{
    private FileStream fileStream;
    private StreamWriter streamWriter;
    private bool isEditorCreate = false;//是否在编辑器中也产生日志文件
    private int showFrames = 1000;  //打印所有
    #region instance
    private static readonly object obj = new object();
    private static DebugTrace m_instance;
    public static DebugTrace Instance
    {
        get
        {
            if (m_instance == null)
            {
                lock (obj)
                {
                    if (m_instance == null)
                        m_instance = new DebugTrace();
                }
            }
            return m_instance;
        }
    }
    #endregion
    private DebugTrace()
    {
    }
    /// <summary>
    /// 开启跟踪日志信息
    /// </summary>
    public void StartTrace()
    {
        if (Debug.unityLogger.logEnabled)
        {
            if (Application.isEditor)
            {
                //在编辑器中设置isEditorCreate==true时候产生日志
                if (isEditorCreate)
                {
                    CreateOutlog();
                }
            }
            //不在编辑器中 是否产生日志由  Debug.unityLogger.logEnabled 控制
            else
            {
                CreateOutlog();
            }
        }
    }
    private void Application_logMessageReceivedThreaded(string logString, string stackTrace, LogType type)
    {
        //  Debug.Log(stackTrace);  //打包后staackTrace为空 所以要自己实现
        if (type != LogType.Warning)
        {
            // StackTrace stack = new StackTrace(1,true); //跳过第二?（1）帧
            StackTrace stack = new StackTrace(true);  //捕获所有帧
            string stackStr = string.Empty;
            int frameCount = stack.FrameCount;  //帧数
            if (this.showFrames > frameCount) this.showFrames = frameCount;  //如果帧数大于总帧速 设置一下
            //自定义输出帧数,可以自行试试查看效果
            for (int i = stack.FrameCount - this.showFrames; i < stack.FrameCount; i++)
            {
                StackFrame sf = stack.GetFrame(i);  //获取当前帧信息
                                                    // 1:第一种    ps:GetFileLineNumber 在发布打包后获取不到
                stackStr += "at [" + sf.GetMethod().DeclaringType.FullName +
                            "." + sf.GetMethod().Name +
                            ".Line:" + sf.GetFileLineNumber() + "]\n            ";
                //或者直接调用tostring 显示数据过多 且打包后有些数据获取不到
                // stackStr += sf.ToString();
            }
            //或者 stackStr = stack.ToString();
            string content = string.Format("time: {0}   logType: {1}    logString: {2} \nstackTrace: {3} {4} ",
                                               DateTime.Now.ToString("HH:mm:ss"), type, logString, stackStr, "\r\n");
            streamWriter.WriteLine(content);
            streamWriter.Flush();
        }
    }
    private void CreateOutlog()
    {
        if (!Directory.Exists(Application.dataPath + "/../" + "OutLog"))
            Directory.CreateDirectory(Application.dataPath + "/../" + "OutLog");
        string path = Application.dataPath + "/../OutLog" + "/" + DateTime.Now.ToString("yyyyMMddHHmmss") + "_log.txt";
        fileStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite);
        streamWriter = new StreamWriter(fileStream);
        Application.logMessageReceivedThreaded += Application_logMessageReceivedThreaded;
    }
    /// <summary>
    /// 关闭跟踪日志信息
    /// </summary>
    public void CloseTrace()
    {
        Application.logMessageReceivedThreaded -= Application_logMessageReceivedThreaded;
        streamWriter.Dispose();
        streamWriter.Close();
        fileStream.Dispose();
        fileStream.Close();
    }
    /// <summary>
    /// 设置选项
    /// </summary>
    /// <param name="logEnable">是否记录日志</param>
    /// <param name="showFrams">是否显示所有堆栈帧 默认只显示当前帧 如果设为0 则显示所有帧</param>
    /// <param name="filterLogType">过滤 默认log级别以上</param>
    /// <param name="editorCreate">是否在编辑器中产生日志记录 默认不需要</param>
    public void SetLogOptions(bool logEnable, int showFrams = 1, LogType filterLogType = LogType.Log, bool editorCreate = false)
    {
        Debug.unityLogger.logEnabled = logEnable;
        Debug.unityLogger.filterLogType = filterLogType;
        isEditorCreate = editorCreate;
        this.showFrames = showFrams == 0 ? 1000 : showFrams;
    } 
}

关于 filterLogType
filterLogType默认设置是Log，会显示所有类型的Log。
Warning：会显示Warning,Assert,Error,Exception
Assert：会显示Assert，Error，Exception
Error：显示Error和Exception
Exception：只会显示Exception

using UnityEngine;
public class Test : MonoBehaviour
{
    private BoxCollider boxCollider;
    void Start()
    {
        DebugTrace.Instance.SetLogOptions(true, 2, editorCreate: true); //设置日志打开 显示2帧 并且编辑器下产生日志
        DebugTrace.Instance.StartTrace();
        Debug.Log("log");
        Debug.Log("log", this);
        Debug.LogError("LogError");
        Debug.LogAssertion("LogAssertion");
        boxCollider.enabled = false;  //报错 发布后捕捉不到帧
    }
    private void OnApplicationQuit()
    {
        DebugTrace.Instance.CloseTrace();
    }
}

如果在编辑器中也设置产生日志，日志文件在当前项目路径下，打包后在exe同级目录下
在打包发布后某些数据会获取不到 例如行号

StackFrame参考

最后看下效果：

不足

发布版本 出现异常捕捉不到 行号获取不到
debug版本可以勾选DevelopMend build 捕捉到更多信息