#QT（QT时钟）

1.IDE：QTCreator

2.实验

3.记录

qtime（qtindex.php/tags-41973.html" >���时间类）

qtimer（qt的定时类）

4.代码

widget.h

#ifndef WIDGET_H#define WIDGET_H#include #include           //#include          //#include QT_BEGIN_NAMESPACEnamespace Ui {class Widget;}QT_END_NAMESPACEclass Widget : public QWidget{    Q_OBJECT    QTime time;           //    QTimer timer;         //public:    Widget(QWidget *parent = nullptr);    ~Widget();private slots:    void on_start_pb_clicked();    void timeout_slot();    void on_stop_pb_clicked();    void on_reset_pb_clicked();    void on_dadian_pb_clicked();private:    Ui::Widget *ui;};#endif // WIDGET_H

widget.cpp

#include "widget.h"#include "ui_widget.h"static int i;Widget::Widget(QWidget *parent)    : QWidget(parent)    , ui(new Ui::Widget){    ui->setupUi(this);    connect(&timer,SIGNAL(timeout()),this,SLOT(timeout_slot()));    time.setHMS(0,0,0,0);    //设置时间0时0分0秒0毫秒    ui->show_time->setText("00:00:00:000");  //初始化显示}Widget::~Widget(){    delete ui;}void Widget::on_start_pb_clicked()        //开始按钮按下时{    timer.start(10);       //定时10ms}void Widget::timeout_slot()  //定时到达处理函数{   // qDebug("1s");   time=time.addMSecs(10);   ui->show_time->setText(time.toString("hh:mm:ss.zzz"));}void Widget::on_stop_pb_clicked()  //停止按钮按下时{    timer.stop();     //停止定时器}void Widget::on_reset_pb_clicked()    //重置按钮按下时{    timer.stop();     //停止定时器    time.setHMS(0,0,0,0);    //设置时间0时0分0秒0毫秒    ui->show_time->setText("00:00:00:000");  //初始化显示    i=0;              //排名计数器清0}void Widget::on_dadian_pb_clicked()  //打点按钮按下时{    QString temp;    i=i+1;    temp.setNum(i);    ui->keep_dadian->append(temp);    ui->keep_dadian->append(time.toString("hh:mm:ss.zzz"));    //记下打点的时间}