QT设计秒表功能(跑步计时器) QT设计秒表功能(跑步计时器)

本文实例为大家分享了QT设计秒表功能的具体代码，供大家参考，具体内容如下
设计目标
1. 定时器开始
2.复位从0开始计时
3.记录--把记录的时间添加到QTextBrowser， append（时间）
4. QTime t(0,0,0)t = t.addMsec( number )t.toString (“hh:mm:ss:zzz”)
定时器（QTimer）的使用
定时器---定时发送信号timeout
QTimer 定时器类
1.创建定时器类对象
QTimer mtimer;
2.把定时器信号与槽函数关联
connect(&mtimer, &QTimer::timeout, this, &TimerWin::on_outBt_clicked);
3.启动定时器
mtimer.start(1000);
4.停止定时器
mtimer.stop();
QT Creator组件布局

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运行效果
【QT设计秒表功能(跑步计时器)】
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源码
stopwatchwin.h

#ifndef STOPWATCHWIN_H#define STOPWATCHWIN_H #include #include #include namespace Ui {class StopwatchWin; } class StopwatchWin : public QMainWindow{Q_OBJECT public:explicit StopwatchWin(QWidget *parent = nullptr); ~StopwatchWin(); void fun_clicked(); private slots:void on_pushButton_clicked(); void on_startBt_clicked(); void on_stopBtn_clicked(); void on_recordBtn_clicked(); void on_resertBt_clicked(); private:Ui::StopwatchWin *ui; //QTime t; QTime t = QTime(0,0,0,0); QTimer mtimer; }; #endif // STOPWATCHWIN_H

stopwatchwin.cpp

#include "stopwatchwin.h"#include "ui_stopwatchwin.h"#include StopwatchWin::StopwatchWin(QWidget *parent) :QMainWindow(parent),ui(new Ui::StopwatchWin){ui->setupUi(this); //把定时器信号与槽函数关联connect(&mtimer, &QTimer::timeout, this, &StopwatchWin::fun_clicked); } StopwatchWin::~StopwatchWin(){delete ui; } void StopwatchWin::fun_clicked(){QString tim = t.toString("hh:mm:ss:zzz"); t = t.addMSecs(10); ui->lcdNumber->display(tim); qDebug()<<"1111"; }void StopwatchWin::on_startBt_clicked(){qDebug()<<"启动定时器"; mtimer.start(10); } void StopwatchWin::on_stopBtn_clicked(){qDebug()<<"停止定时器"; if(mtimer.isActive()){mtimer.stop(); }} void StopwatchWin::on_pushButton_clicked(){ } void StopwatchWin::on_recordBtn_clicked(){QString tim = t.toString("hh:mm:ss:zzz"); ui->textBrowser->append(tim); } void StopwatchWin::on_resertBt_clicked(){t = QTime(0,0,0,0); }

main.cpp