一、样图
二、代码
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
class QLabel;
class QTimer;
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
private:
Ui::Widget *ui;
QLabel *label;
QTimer *timer;
};
#endif // WIDGET_H
widget.cpp
#include "widget.h"
#include "./ui_widget.h"
#include <QLabel>
#include <QTimer>
#include <QDateTime>
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
setFixedSize(400, 100);
label = new QLabel{this};
label->resize(400, 100);
timer = new QTimer(this);
timer->start(1000);
QDateTime datetime = QDateTime::currentDateTime();
label->setText(datetime.toString("t yyyy-MM-dd hh:mm:ss a dddd"));
connect(timer, &QTimer::timeout, this, [=]() {
QDateTime datetime = QDateTime::currentDateTime();
label->setText(datetime.toString("t yyyy-MM-dd hh:mm:ss a dddd"));
});
}
Widget::~Widget()
{
delete ui;
}
main.cpp
#include "widget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}