Qt QTimer定时器相关

1.创建QTimer类对象
#------------.h----------#
    QTimer *m_Timer;    //定时器对象

#-------------.cpp-------#
    m_Timer = new QTimer(this);
    connect(m_Timer,&QTimer::timeout,
                [=]()
                {
                    static int n = 0;
                    n++;
                    ui->lcdNumber->display(n);
                }
            );

2.通过timerEvent事件方法
#---------------.h-----------#
protected:
    void timerEvent(QTimerEvent *event);
private:
    int m_time_int;

#---------------.cpp----------#
m_time_int = this->startTimer(1000);

void Widget::timerEvent(QTimerEvent *event)
{
    if(event->timerId() == m_time_int)
    {
        static int i = 0;
        i++;
        ui->lcdNumber->display(i);
    }
}