Qt——Qtimer类定时器

dialog.h:

 

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

#include<QTimer>

#include<QLCDNumber>

class Dialog : public QDialog

{

    Q_OBJECT

public slots:

    void onTimerout();

public:

    Dialog(QWidget *parent = 0);

    ~Dialog();

    private:

    QLCDNumber *lcd;

    QTimer *timer;

};

#endif // DIALOG_H

 

 

 

dialog.cpp:

#include "dialog.h"

#include<QTime>

#include<QVBoxLayout>

Dialog::Dialog(QWidget *parent)

    : QDialog(parent)

{

    lcd=new QLCDNumber();

    lcd->setDigitCount(10);

    lcd->setMode(QLCDNumber::Dec);

    lcd->setSegmentStyle(QLCDNumber::Flat);

    timer=new QTimer();

    timer->setInterval(1000);

    timer->start();

    QVBoxLayout *layout = new QVBoxLayout();

    layout->addWidget(lcd);

    connect(timer,SIGNAL(timeout()),this,SLOT(onTimerout()));

    this->setLayout(layout);

    this->resize(800,400);

    this->setWindowTitle("LCD时钟");

}

Dialog::~Dialog()

{

}

void Dialog::onTimerout()

{

QTime time=QTime::currentTime();

lcd->display(time.toString("hh:mm:ss"));

}