Qt timerEvent实现简单秒表功能
本文实例为大家分享了Qt timerEvent实现简单秒表的具体代码，供大家参考，具体内容如下
#ifndef WIDGET_H
#define WIDGET_H
//头文件
#include<QWidget>
#include<QObject>
#include<QTimerEvent>
#include<QTimer>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
double i = 0;
//QString s = QString::number(i);
private:
Ui::Widget *ui;
//QTimer *myTimer;// 定义定时器对象
int id1,id3;
int id2 = 0;
protected:
void timerEvent(QTimerEvent *event); // 声明
private slots:
void on_pushButton_clicked();
void on_pushButton_3_clicked();
void on_pushButton_2_clicked();
};
#endif // WIDGET_H
//widget.cpp
#include "widget.h"
#include "ui_widget.h"
#include<QObject>
#include<QTimer>
#include<QDebug>
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
ui->lineEdit->setFixedHeight(60);
ui->lineEdit->setFont(QFont( "Arial" , 32 ));
ui->lineEdit->setText("0.0");
}
Widget::~Widget()
{
delete ui;
}
void Widget::timerEvent(QTimerEvent *event)
{
// 判断是哪个定时器
if(event->timerId() == id1){
qDebug() << "timer1";
i = i+0.1;
QString s = QString::number(i);
ui->lineEdit->setText(s);
}
}
void Widget::on_pushButton_clicked() //开始
{
id1 = startTimer(100);
//timer_1 = startTimer(100);
}
void Widget::on_pushButton_3_clicked() //停止
{
killTimer(id1);
}
void Widget::on_pushButton_2_clicked() //记录
{
QString s = ui->lineEdit->text();
ui->listWidget->addItem(s);
id2=id2+1;
QString id2s = QString::number(id2);
ui->label_2->setText("记录次数："+id2s);
}
ui
效果
