Qt 日志界面类

1 UI界面文件为QTablewidget

2 和spdlog结合使用

3 头文件

#ifndef _SIMLOGWIDGET_H_
#define _SIMLOGWIDGET_H_

#include <QtWidgets/QWidget>
#include "ui_simlog.h"



//日志等级
enum LogLevel
{
    KLogTrace = 0,
    KLogDebug,
    KLogInfo,
    KLogWarn,
    KLogErr,
    KLogCritical,
};



class  LogWidget : public QWidget
{
    Q_OBJECT

public:
    static LogWidget& Instance();
    void Log(LogLevel level, std::string data,bool writefile = false);
private:
    LogWidget(QWidget *parent = Q_NULLPTR);
    Ui::SimLogClass ui;

    int level_;
};

//writefile表示是否写入文件，默认不写文件
void LOGUI(LogLevel level, std::string data, bool writefile = false);

#endif //_SIMLOGWIDGET_H_

4 cpp文件

#include "simlogwidget.h"

#include <QDateTime>
#include <QDebug>
#include <QString>
#include "simlog.h"

void LOGUI(LogLevel level, std::string data, bool writefile)
{
    LogWidget::Instance().Log(level, data, writefile);
}

LogWidget::LogWidget(QWidget *parent): QWidget(parent)
{
    ui.setupUi(this);
    //设置表格最后一列自适应拉伸
    ui.log_widget_->setColumnWidth(0, 220);
    ui.log_widget_->setColumnWidth(1, 70);
    ui.log_widget_->horizontalHeader()->setStretchLastSection(true);
    //设置表格禁止编辑
    ui.log_widget_->setEditTriggers(QAbstractItemView::NoEditTriggers);
    //设置单击选择一行
    ui.log_widget_->setSelectionBehavior(QAbstractItemView::SelectRows);
    //设置只能选择一行，不能多行选中
    ui.log_widget_->setSelectionMode(QAbstractItemView::SingleSelection);

}

LogWidget& LogWidget::Instance()
{
    static LogWidget *logwidget=new LogWidget;
    return *logwidget;
}


void LogWidget::Log(LogLevel level, std::string data,bool writefile)
{
    QString s_level;

    if (level == KLogTrace)
    {
        if (writefile)
            LTrace(data);
        s_level = "trace";
    }
    else if (level == KLogDebug)
    {
        if (writefile)
            LDebug(data);
        s_level = "debug";
    }
    else if (level == KLogInfo)
    {
        if (writefile)
            LInfo(data);
        s_level = "info";
    }
    else if (level == KLogWarn)
    {
        if (writefile)
            LWarn(data);
        s_level = "warn";
    }
    else if (level == KLogErr)
    {
        if (writefile)
            if (writefile)
                LError(data);
        s_level = "error";
    }
    else if (level == KLogCritical)
    {
        if (writefile)
            LCritical(data);
        s_level = "critical";
    }

    QDateTime current_date_time = QDateTime::currentDateTime();
    QString current_date = current_date_time.toString("yyyy-MM-dd hh:mm::ss.zzz");

    int row_count = ui.log_widget_->rowCount();
    ui.log_widget_->insertRow(row_count);
    QTableWidgetItem *item_time = new QTableWidgetItem(current_date);
    QTableWidgetItem *item_level = new QTableWidgetItem(s_level);
    QTableWidgetItem *item_data = new QTableWidgetItem(QString::fromStdString(data));
    ui.log_widget_->setItem(row_count, 0, item_time);
    ui.log_widget_->setItem(row_count, 1, item_level);
    ui.log_widget_->setItem(row_count, 2, item_data);


}

5 使用方法

（1）包含头文件

（2）调用函数，如下：

    for (int i = 0; i < 100; i++)
    {
        LOGUI(KLogDebug, "infomessage");
        LOGUI(KLogInfo, "errormessage");
    }

6 日志格式为：时间-日志类别-日志信息