Qt实现页面时钟显示

#include <QtWidgets>

#include "digitalclock.h"

DigitalClock::DigitalClock(QWidget *parent)
    : QLCDNumber(parent)
{
    setSegmentStyle(Filled);

    QTimer *timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &DigitalClock::showTime);
    timer->start(1000);

    showTime();

    setWindowTitle(tr("Digital Clock"));
    resize(150, 60);
}

void DigitalClock::showTime()
{
    QTime time = QTime::currentTime();
    QString text = time.toString("hh:mm");
    if ((time.second() % 2) == 0)
        text[2] = ' ';
    display(text);
}

#include <QApplication>

#include "digitalclock.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    DigitalClock clock;
    clock.show();
    return app.exec();
}

结果显示：