Qt QDateTime QTimer的简单实用

 qttimer.h

#ifndef QTTIMER_H
#define QTTIMER_H

#include <QtWidgets/QDialog>
#include "ui_qttimer.h"

class qttimer : public QDialog
{
	Q_OBJECT

public:
	qttimer(QWidget *parent = 0);
	~qttimer();

private:
	Ui::qttimerClass ui;
	int count;

private slots:
	void slottimedown();
};


#endif // QTTIMER_H

qttimer.cpp

#include "qttimer.h"
#include <QtCore/QTime>
#include <QtCore/QTimer>
#include <QtWidgets/QLabel>
#include <QDateTime>

qttimer::qttimer(QWidget *parent) : count(0)
	, QDialog(parent)
{
	ui.setupUi(this);

	QTimer *time_clock = new QTimer(this);
	connect(time_clock, SIGNAL(timeout()), this, SLOT(slottimedown()));
	time_clock->start(1000);

}

qttimer::~qttimer()
{

}

void qttimer::slottimedown()
{
	QString value;
    ui.timelabel->setText(value.setNum(count++));
	QDateTime time = QDateTime::currentDateTime();
	QString str = time.toString("yyyy-MM-dd dddd hh:mm:ss");
	ui.datelabel->setText(str);
}