.pro

#-------------------------------------------------
#
# Project created by QtCreator 2016-05-30T22:59:31
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = mytimerevent
TEMPLATE = app


SOURCES += main.cpp\
        widget.cpp

HEADERS  += widget.h

FORMS    += widget.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();
}

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include <QDebug>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    id1 = startTimer(1000);                  // 开启一个1秒定时器，返回其ID
    id2 = startTimer(1500);
    id3 = startTimer(2200);

}

Widget::~Widget()
{
    delete ui;
}


void Widget::timerEvent(QTimerEvent *event)
{
    if (event->timerId() == id1) {       // 判断是哪个定时器
        qDebug() << "timer1";
    }
    else if (event->timerId() == id2) {
        qDebug() << "timer2";
    }
    else {
        qDebug() << "timer3";
    }
}

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();

private:
    Ui::Widget *ui;
    int id1, id2, id3;

protected:
    void timerEvent(QTimerEvent *event);

};

#endif // WIDGET_H