Unity在运行时候打印log输出日志

using UnityEngine;
using System.Collections;


public class GuiDebug : MonoBehaviour {


private bool bShow=false;
public Rect windowRect0  =  new Rect(80,100,420,366); 


public string mSzLog="";
// Use this for initialization
void Start () {

}


void OnEnable() {  
Application.RegisterLogCallback(HandleLog);  
}  
void OnDisable() {  
Application.RegisterLogCallback(null);  
}  


void HandleLog(string logString, string stackTrace, LogType type) {  
//output = logString;  
//stack = stackTrace;  
mSzLog+=logString+"\n";
}  


// Update is called once per frame
void Update () {
if (Input.GetKeyUp  (KeyCode.P)) 
{
bShow=!bShow;
if (bShow)
{
OnEnable();
}
else
{
OnDisable();
}
}
}


void DoMyWindow(int windowID)  
{   
if(GUI.Button(new Rect(20,20,80,20),"Add"))
{ 
mSzLog+="Hello!!\n"; 
}
if(GUI.Button(new Rect(120,20,80,20),"Clear"))
{
mSzLog="";
}
GUI.TextArea(new Rect(20,50,380,300),mSzLog);  
//GUI.DragWindow（）;//


GUI.DragWindow(new Rect(0, 0, 600, 480));


//  
}   




void OnGUI()
{
if (bShow)
{
windowRect0 = GUI.Window (0, windowRect0, DoMyWindow, "Draggable Window"); 
}
}
}