Qt QDateTime QTimer的简单实用

qttimer.h

 1 #ifndef QTTIMER_H
 2 #define QTTIMER_H
 3 
 4 #include <QDialog>
 5 
 6 namespace Ui {
 7 class qttimer;
 8 }
 9 
10 class qttimer : public QDialog
11 {
12     Q_OBJECT
13 
14 public:
15     explicit qttimer(QWidget *parent = 0);
16     ~qttimer();
17 
18 private:
19     Ui::qttimer *ui;
20     int count;
21 
22 private slots:
23     void slottimedown();
24 };
25 
26 #endif // QTTIMER_H

qttimer.cpp

 1 #include "qttimer.h"
 2 #include <QTime>
 3 #include <QTimer>
 4 #include <QLabel>
 5 #include <QDateTime>
 6 #include "ui_qttimer.h"
 7 
 8 qttimer::qttimer(QWidget *parent) : count(0)
 9     , QDialog(parent),
10     ui(new Ui::qttimer)
11 {
12     ui->setupUi(this);
13     QTimer *time_clock = new QTimer(this);
14     connect(time_clock, SIGNAL(timeout()), this, SLOT(slottimedown()));
15     time_clock->start(1000);
16 }
17 
18 qttimer::~qttimer()
19 {
20     delete ui;
21 }
22 
23 
24 void qttimer::slottimedown()
25 {
26     QString value;
27     ui->timelabel->setText(value.setNum(count++));
28     QDateTime time = QDateTime::currentDateTime();
29     QString str = time.toString("yyyy-MM-dd dddd hh:mm:ss");
30     ui->datelabel->setText(str);
31 }

main.cpp

 1 #include "qttimer.h"
 2 #include <QApplication>
 3 
 4 int main(int argc, char *argv[])
 5 {
 6     QApplication a(argc, argv);
 7     qttimer w;
 8     w.show();
 9     return a.exec();
10 }

界面很简单，一个lable，两个lineEdit，然后更改对象名即可。