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 = );
     ~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()
     , 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();
 }

 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。