Logger.cs

/**
 * Copyright (c) 2017-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the Scripts directory of this source tree. An additional grant 
 * of patent rights can be found in the PATENTS file in the same directory.
 */

using UnityEngine;
using System.Collections;

public class Logger : MonoBehaviour
{
    string log;

    Queue queue = new Queue();

    void OnEnable()
    {
        UnityEngine.Application.logMessageReceived += HandleLog;
    }

    void OnDisable()
    {
        UnityEngine.Application.logMessageReceived -= HandleLog;
    }

    void HandleLog( string logString, string stackTrace, LogType logType )
    {
        queue.Enqueue( "\n [" + logType + "] : " + logString );

        if ( logType == LogType.Exception )
        {
            queue.Enqueue( "\n" + stackTrace );
        }

        while ( queue.Count > 30 )
        {
            queue.Dequeue();
        }

        log = string.Empty;

        foreach ( string s in queue )
        {
            log += s;
        }
    }

    void OnGUI()
    {
        GUI.TextArea( new Rect( 0, 0, Screen.width / 3, Screen.height ), log );
    }
}