Qt QDateTime QTimer的简单实用

转载：N3verL4nd

qttimer.h

#ifndef QTTIMER_H
#define QTTIMER_H

#include <QDialog>

namespace Ui {
class qttimer;
}

class qttimer : public QDialog
{
    Q_OBJECT

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

private:
    Ui::qttimer *ui;
    int count;

private slots:
    void slottimedown();
};

#endif // QTTIMER_H

qttimer.cpp

#include "qttimer.h"
#include <QTime>
#include <QTimer>
#include <QLabel>
#include <QDateTime>
#include "ui_qttimer.h"

qttimer::qttimer(QWidget *parent) : count(0)
    , QDialog(parent),
    ui(new Ui::qttimer)
{
    ui->setupUi(this);
    QTimer *time_clock = new QTimer(this);
    connect(time_clock, SIGNAL(timeout()), this, SLOT(slottimedown()));
    time_clock->start(1000);
}

qttimer::~qttimer()
{
    delete ui;
}


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);
}

main.cpp

#include "qttimer.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    qttimer w;
    w.show();
    return a.exec();
}

界面很简单，一个lable，两个lineEdit，然后更改对象名即可。