qt 定时器

定时器

头文件添加：

QTimer m_timerTime;//时间定时器，显示时间
public slots:
    void SlotTimerTime();

构造函数中添加：

connect(&m_timerTime, SIGNAL(timeout()), this, SLOT(SlotTimerTime()));
    //connect(&m_timerTime, &QTimer::timeout, this, &TitleBarTop::SlotTimerTime);
    m_timerTime.start(1000);

槽函数：

SlotTimerTime()
{
    QDateTime dt = QDateTime::currentDateTime();
    QString time = dt.toString("hh:mm:ss");
    ui->lblTime->setText(time);
}