重要函数:
1.int startTimer(int); //设置定时器，返回一个ld.
2.int event->timerld(); //返回当前的ld.
3.void killTimer(int); //停止定时器.
首先从Qt设计师中拖拽出三个按钮，由于只是演示定时器事件的使用，所以就没有布局的需要了.
以下是”c.cpp”的代码:
#include "c.h"c::c(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this); //连接信号与槽.
connect(ui.startButton, SIGNAL(clicked()), this, SLOT(startTimerSlot()));
connect(ui.stopButton, SIGNAL(clicked()), this, SLOT(stopTimerSlot()));
}
c::~c()
{
}void c::timerEvent(QTimerEvent*event)
{ //判断当前定时器对应的是哪个ld.
if (event->timerId() == this->m_lamp)
{ if (this->m_lampStatus == false)
{ //设置按钮的图标.
ui.toolButton->setIcon(QIcon("Icons/lamp.png")); this->m_lampStatus = true;
} else
{
ui.toolButton->setIcon(QIcon("Icons/space.png"));
this->m_lampStatus = false;
}
}
}void c::startTimerSlot()
{ //设置定时器，返回一个timerld.注意单位为毫秒，1000毫秒等于1秒.
this->m_lamp = this->startTimer(1000);
}void c::stopTimerSlot()
{ //停止定时器.
this->killTimer(this->m_lamp);
}12345678910111213141516171819202122232425262728293031323334353637383940414243444546以下是”c.h”的代码:
#ifndef C_H#define C_H#include <QtWidgets/QMainWindow>#include "ui_c.h"#include <QLabel>#include <QTimerEvent>class c : public QMainWindow
{
Q_OBJECTpublic: c(QWidget *parent = 0);
~c();protected:
//这是一个虚函数，从QEvent继承而来. void timerEvent(QTimerEvent*event);private slots: void startTimerSlot(); void stopTimerSlot();private:
Ui::cClass ui; int m_lamp; bool m_lampStatus = false;
};#endif // C_H12345678910111213141516171819202122232425262728293031最后是”main.cpp”的代码:
#include "c.h"#include <QtWidgets/QApplication>int main(int argc, char *argv[])
{
QApplication a(argc, argv);
c w;
w.show(); return a.exec();
}本文出自 “13109855” 博客，请务必保留此出处http://13119855.blog.51cto.com/13109855/1971837
Qt学习: QTimerEvent定时器事件的处理程序代码示例
原文：http://13119855.blog.51cto.com/13109855/1971837