QtLog

QtLog

#include "mainwindow.h"  
#include <QApplication>  
#include <QByteArray>  
#include <QDebug>  
  
#define  LOG_FILE_PATH  "D:\QtLog\log.txt"  
static FILE* g_log_fp=0;  
static void closLogFile(){  
    fclose(g_log_fp);//main函数退出关闭日志文档  
  
}  
static void myMessageOutPut(QtMsgType type,const QMessageLogContext &contex,const QString &msg){  
    QByteArray localMsg=msg.toLocal8Bit();  
    switch (type) {  
    case QtDebugMsg:  
        fprintf(g_log_fp,"Debug :%s(%s:%u,%s)
",localMsg.constData(),contex.file,contex.line,contex.function);  
  
        break;  
    case QtWarningMsg:  
        fprintf(g_log_fp,"Waring :%s(%s:%u,%s)
",localMsg.constData(),contex.file,contex.line,contex.function);  
  
        break;  
    case QtCriticalMsg:  
        fprintf(g_log_fp,"Critical :%s(%s:%u,%s)
",localMsg.constData(),contex.file,contex.line,contex.function);  
  
        break;  
    case QtFatalMsg:  
        fprintf(g_log_fp,"Fatal :%s(%s:%u,%s)
",localMsg.constData(),contex.file,contex.line,contex.function);  
        abort();// 致命错误，程序停止退出  
        break;  
  
    default:  
        break;  
    }  
  
  
}  
int main(int argc, char *argv[])  
{  
        
    g_log_fp=fopen(LOG_FILE_PATH,"wt");  
    atexit(closLogFile);//程序结束执行关闭文件  
    qInstallMessageHandler(myMessageOutPut);  
    QApplication a(argc, argv);  
    //    MainWindow w;  
    //    w.show();  
  
    qDebug()<<"I am debug;";  
    qWarning()<<"I am waring";  
    qCritical()<<"I am critical";  
qFatal("I am  fatal");  
  
    return a.exec();  
}  

http://blog.csdn.net/leejore11/article/details/46837185