Qt制作计划器，定时器和倒计时器

介绍

Qt实现三种定时器的功能，来帮助我们定时去执行或者运行某个任务，采用独立的界面来实现，到点发送信号指示，动态更新倒计时器时间。

废话少说
直接上图上代码

主界面头文件

#ifndef TIMERTASKWIDGET_H
#define TIMERTASKWIDGET_H

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include "timerhandler.h"

namespace Ui {
class TimerTaskWidget;
}

class TimerTaskWidget : public QWidget
{
    Q_OBJECT

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

    void init();

    void getBeiJingTimer();

    void stopTimer();
signals:
    void sendTimerStop();//发送到线程
    void sendTimerHandlerStart(int type, const QVariant& var); //发送线程开始计时

    void sendTimerStart(); //发送到主界面
    void sendTimeStr(QString str);
private slots:
    void on_pushButton_Save_clicked();

    void on_radioButton_DingShi_clicked();

    void on_radioButton_DaoJiShi_clicked();

    void onNetworkFinish();

    void on_pushButton_clicked();

    void on_comboBox_DingShi_TimeType_currentIndexChanged(int index);

    void on_comboBox_JiHua_TimeType_currentIndexChanged(int index);

    void on_radioButton_JiHua_clicked();

    void wait(int ms); //等待
private:
    Ui::TimerTaskWidget *ui;

    QNetworkAccessManager networkManager;
    QNetworkReply* reply;

    TimerHandler* m_TimerHandler;

    QDateTime m_BeiJingTime;
    int m_IsGetSucceed; // -1开始等待  1获取成功 0获取失败 -2循环等待

};
#endif // TIMERTASKWIDGET_H

主界面cpp

#include "timertaskwidget.h"
#include "ui_timertaskwidget.h"
#include 
#include 
#include 
#include 
#include 

TimerTaskWidget::TimerTaskWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::TimerTaskWidget)
{
    ui->setupUi(this);
    this->setWindowTitle("定时器编辑");
    setWindowFlags(this->windowFlags() & ~Qt::WindowMinimizeButtonHint); // 隐藏最小化按钮

    ui->comboBox_JiHua_TimeType->setView(new QListView);
    ui->comboBox_DingShi_TimeType->setView(new QListView);
    ui->comboBox_DingShi->setView(new QListView);


    m_TimerHandler = new TimerHandler();
    connect(m_TimerHandler, SIGNAL(sendTimerStart()), this, SIGNAL(sendTimerStart()));
    connect(m_TimerHandler, SIGNAL(sendTimeStr(QString)), this, SIGNAL(sendTimeStr(QString)));
    connect(this, SIGNAL(sendTimerStop()), m_TimerHandler, SLOT(onReadStop()));
    connect(this, SIGNAL(sendTimerHandlerStart(int,QVariant)), m_TimerHandler, SLOT(onTimerHandlerStart(int,QVariant)));

    init();
}

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

void TimerTaskWidget::init()
{
    ui->stackedWidget->setCurrentIndex(0);
    ui->dateTimeEdit_DingShi->setDateTime(QDateTime::currentDateTime());
    ui->dateTimeEdit_JiHua->setDateTime(QDateTime::currentDateTime());

    ui->comboBox_DingShi->setCurrentIndex(0);
}

void TimerTaskWidget::getBeiJingTimer()
{
    QNetworkRequest request(QUrl("http://worldtimeapi.org/api/timezone/Asia/Shanghai"));
    reply = networkManager.get(request);
    connect(reply, SIGNAL(finished()), this, SLOT(onNetworkFinish()));

    m_IsGetSucceed = -1;
    m_BeiJingTime = QDateTime();
}

void TimerTaskWidget::stopTimer()
{
    emit sendTimerStop();
}

void TimerTaskWidget::on_pushButton_Save_clicked()
{
    int type = 0;
    QVariant var;

    if (ui->radioButton_JiHua->isChecked()) {
        type = 0;
        JiHuaData jihua;
        jihua.timeType = ui->comboBox_JiHua_TimeType->currentIndex();
        jihua.time = ui->dateTimeEdit_JiHua->dateTime();
        if (jihua.timeType == 0) {
            if (jihua.time < QDateTime::currentDateTime()) {
                QMessageBox::warning(this, "警告", "计划时间不可小于当前时间!");
                return;
            }
        }
        else if (jihua.timeType == 1) {
            m_IsGetSucceed = -1;
            getBeiJingTimer();
            while (m_IsGetSucceed < 0) {
                wait(10);
                if (m_IsGetSucceed == 1) {
                    if (!m_BeiJingTime.isNull()) {
                        if (jihua.time < m_BeiJingTime) {
                            QMessageBox::warning(this, "警告", "计划时间不可小于当前时间!");
                            return;
                        }
                    }
                }
                else if (m_IsGetSucceed == 0) {
                    QMessageBox::warning(this, "警告", "北京时间获取失败,或者网络无连接!");
                    return;
                }
            }
        }

        var.setValue<JiHuaData>(jihua);
    }
    else if (ui->radioButton_DingShi->isChecked()) {
        type = 1;

        DingShiData dingshi;
        dingshi.timeType = ui->comboBox_DingShi_TimeType->currentIndex();
        dingshi.time = ui->dateTimeEdit_DingShi->dateTime();
        dingshi.isRepeat = ui->comboBox_DingShi->currentIndex();

        if (dingshi.timeType == 0) {
            if (dingshi.time.time() < QTime::currentTime()) {
                QMessageBox::warning(this, "警告", "定时时间不可小于当前时间!");
                return;
            }
        }
        else if (dingshi.timeType == 0) {
            m_IsGetSucceed = -1;
            getBeiJingTimer();
            while (m_IsGetSucceed < 0) {
                wait(10);
                if (m_IsGetSucceed == 1) {
                    if (!m_BeiJingTime.isNull()) {
                        if (dingshi.time.time() < m_BeiJingTime.time()) {
                            QMessageBox::warning(this, "警告", "计划时间不可小于当前时间!");
                            return;
                        }
                    }
                }
                else if (m_IsGetSucceed == 0) {
                    QMessageBox::warning(this, "警告", "北京时间获取失败,或者网络无连接!");
                    return;
                }
            }
        }

        var.setValue<DingShiData>(dingshi);
    }
    else if (ui->radioButton_DaoJiShi->isChecked()) {
        type = 2;

        DaoJiShiData daojishi;

        daojishi.day = ui->spinBox_Day->value();
        daojishi.hour = ui->spinBox_Hour->value();
        daojishi.minute = ui->spinBox_Minute->value();
        daojishi.second = ui->spinBox_Second->value();

        daojishi.daoJiShiNumber = ((daojishi.day * 24 * 60 * 60) + (daojishi.hour * 60 * 60) + (daojishi.minute * 60) + daojishi.second);
        daojishi.daoJiShiNumber *= 1000;

        daojishi.isRepeat = ui->checkBox_DaoJiShi->isChecked();
        if (daojishi.daoJiShiNumber <= 0) {
            QMessageBox::warning(this, "警告", "请设置倒计时时间!");
            return;
        }

        var.setValue<DaoJiShiData>(daojishi);
    }

    emit sendTimerHandlerStart(type, var);
    this->hide();
}


void TimerTaskWidget::on_radioButton_JiHua_clicked()
{
    emit sendTimerStop();
    if (ui->radioButton_JiHua->isChecked()) {
        ui->stackedWidget->setCurrentIndex(0);
    }
}

void TimerTaskWidget::on_radioButton_DingShi_clicked()
{
    emit sendTimerStop();
    if (ui->radioButton_DingShi->isChecked()) {
        ui->stackedWidget->setCurrentIndex(1);
    }
}

void TimerTaskWidget::on_radioButton_DaoJiShi_clicked()
{
    emit sendTimerStop();
    if (ui->radioButton_DaoJiShi->isChecked()) {
        ui->stackedWidget->setCurrentIndex(2);
    }
}

void TimerTaskWidget::wait(int ms)
{
    QElapsedTimer t;
    t.start();
    while (t.elapsed() < ms) {
        QCoreApplication::processEvents();
        QThread::msleep(1); // 添加一点延迟，避免循环过于频繁
    }
}

void TimerTaskWidget::onNetworkFinish()
{
    if (reply->error() == QNetworkReply::NoError) {
        QByteArray responseData = reply->readAll();
        QJsonDocument jsonDoc = QJsonDocument::fromJson(responseData);
        QJsonObject jsonObj = jsonDoc.object();
        QString datetimeString = jsonObj["datetime"].toString();

        m_BeiJingTime = QDateTime::fromString(datetimeString, Qt::ISODate);
        m_IsGetSucceed = 1;
    } else {
        m_IsGetSucceed = 0;
        qDebug() << "Error:" << reply->errorString();
    }
}

void TimerTaskWidget::on_pushButton_clicked()
{
    emit sendTimerStop();
    emit sendTimeStr("");
    this->hide();
}

void TimerTaskWidget::on_comboBox_DingShi_TimeType_currentIndexChanged(int index)
{
    if (index == 0) {
        ui->dateTimeEdit_DingShi->setDateTime(QDateTime::currentDateTime());
    }
    if (index == 1) {
        m_IsGetSucceed = -1;
        getBeiJingTimer();
        while (m_IsGetSucceed < 0) {
            wait(10);
            if (m_IsGetSucceed == 1) {
                if (!m_BeiJingTime.isNull()) {
                    ui->dateTimeEdit_DingShi->setDateTime(m_BeiJingTime);
                }
            }
            else if (m_IsGetSucceed == 0) {
                QMessageBox::warning(this, "警告", "北京时间获取失败,或者网络无连接!");
                return;
            }
        }
    }
}

void TimerTaskWidget::on_comboBox_JiHua_TimeType_currentIndexChanged(int index)
{
    if (index == 0) {
        ui->dateTimeEdit_JiHua->setDateTime(QDateTime::currentDateTime());
    }
    if (index == 1) {
        m_IsGetSucceed = -1;
        getBeiJingTimer(); //获取北京时间
        while (m_IsGetSucceed < 0) { //循环等待
            wait(10);
            if (m_IsGetSucceed == 1) {
                if (!m_BeiJingTime.isNull()) {
                    ui->dateTimeEdit_JiHua->setDateTime(m_BeiJingTime);
                }
            }
            else if (m_IsGetSucceed == 0) {
                QMessageBox::warning(this, "警告", "北京时间获取失败,或者网络无连接!");
                return;
            }
        }
    }
}

子线程头文件

#ifndef TIMERHANDLER_H
#define TIMERHANDLER_H

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

struct DaoJiShiData { //倒计时
    int day;    //天
    int hour;   //时
    int minute; //分
    int second; //秒
    bool isRepeat;  //是否重复

    qint64 daoJiShiNumber;
};

struct DingShiData { //定时器
    int timeType; //0本地 1北京
    QDateTime time;

    int isRepeat; //是否重复 0只运行一次 1每天运行 2自定义
};

struct JiHuaData { //计划器
    int timeType; //0本地 1北京
    QDateTime time;
};


class TimerHandler : public QObject
{
    Q_OBJECT
public:
    explicit TimerHandler(QObject *parent = nullptr);
    void getBeiJingTimer();
signals:
    void sendTimerStart();
    void sendTimeStr(QString str);
public slots:
    void onInit();
    void onTimerOut();
    void onTimerHandlerStart(int type, const QVariant& var);

    void onNetworkFinish();
    void onReadStop();
private:
    void startTimeRun();
    void stopTimeRun();
private:
    bool m_IsStart;
    QTimer* m_Timer;

    QNetworkAccessManager* networkManager;
    QNetworkReply* reply;

    JiHuaData m_JiHuaData;
    DingShiData m_DingShiData;
    DaoJiShiData m_DaoJiShiData;

    QDateTime m_BeiJingTime;

    int m_Type;
    int m_IsGetSucceed; // -1开始等待  1获取成功 0获取失败 -2循环等待
};
Q_DECLARE_METATYPE(DaoJiShiData)
Q_DECLARE_METATYPE(DingShiData)
Q_DECLARE_METATYPE(JiHuaData)


#endif // TIMERHANDLER_H

子线程cpp

#include "timerhandler.h"

TimerHandler::TimerHandler(QObject *parent) : QObject(parent)
{
    QThread* t = new QThread();
    this->moveToThread(t);
    connect(t, SIGNAL(started()), this, SLOT(onInit()));
    t->start();
    m_IsStart = false;
}

void TimerHandler::getBeiJingTimer()
{
    QNetworkRequest request(QUrl("http://worldtimeapi.org/api/timezone/Asia/Shanghai"));
    reply = networkManager->get(request);
    connect(reply, SIGNAL(finished()), this, SLOT(onNetworkFinish()));

    m_IsGetSucceed = -1;
    m_BeiJingTime = QDateTime();
}

void TimerHandler::onInit()
{
    networkManager = new QNetworkAccessManager();

    m_Timer = new QTimer();
    connect(m_Timer, SIGNAL(timeout()), this, SLOT(onTimerOut()));
    m_Timer->setInterval(1);
}

void TimerHandler::onTimerOut()
{
    //qDebug()  << "onTimerOut" << QThread::currentThread() << m_IsStart;
    if (!m_IsStart) return;

    if (m_Type == 0) {
        QDateTime time = QDateTime::currentDateTime();
        // qDebug() <
        if (m_JiHuaData.timeType == 0) {
            time = QDateTime::currentDateTime();
        }
        else if (m_JiHuaData.timeType == 1) {
            if (m_IsGetSucceed == -1) {
                getBeiJingTimer();
                m_IsGetSucceed = -2; //等待
                return;
            }
            else if (m_IsGetSucceed == -2) {
                //如果一直没有进入finish就一直退出
                return;
            }
            else if (m_IsGetSucceed == 1) {
                time = m_BeiJingTime;
                m_IsGetSucceed = -1;
            }
            else if (m_IsGetSucceed == 0) {
                stopTimeRun();
                qDebug() <<"北京时间获取失败,或者网络无连接!";
                //QMessageBox::warning(0, "警告", "北京时间获取失败,或者网络无连接!");
                return;
            }
        }

        if (time.toMSecsSinceEpoch() >= m_JiHuaData.time.toMSecsSinceEpoch()) {
            qDebug() << "计划时间到!!!!" << time << m_JiHuaData.time;
            emit sendTimerStart();
            stopTimeRun();
            return;
        }

    }
    else if (m_Type == 1) {
        QDateTime time = QDateTime::currentDateTime();;
        if (m_DingShiData.timeType == 0) {
            time = QDateTime::currentDateTime();
        }
        else if (m_DingShiData.timeType == 1) {
            if (m_IsGetSucceed == -1) {
                getBeiJingTimer();
                m_IsGetSucceed = -2; //等待
                return;
            }
            else if (m_IsGetSucceed == -2) {
                //如果一直没有进入finish就一直退出
                return;
            }
            else if (m_IsGetSucceed == 1) {
                time = m_BeiJingTime;
                m_IsGetSucceed = -1;
            }
            else if (m_IsGetSucceed == 0) {
                stopTimeRun();
                qDebug() <<"北京时间获取失败,或者网络无连接!";
                // QMessageBox::warning(0, "警告", "北京时间获取失败,或者网络无连接!");
                return;
            }
        }
        if (time >= m_DingShiData.time && m_DingShiData.isRepeat == 0) {
            qDebug() << "定时器时间到!!!!" << time << m_DingShiData.time;
            emit sendTimerStart();
            stopTimeRun();
            return;
        }
        if (m_DingShiData.isRepeat == 1) {
            if (time >= m_DingShiData.time) {
                qDebug() << "定时器时间到!!!!" << time << m_DingShiData.time;
                emit sendTimerStart();
                m_DingShiData.time = m_DingShiData.time.addDays(1);
            }
        }

    }
    else if (m_Type == 2) {
        if (m_DaoJiShiData.daoJiShiNumber % 1000 == 0) {
            emit sendTimeStr(QString("倒计时:%1S\n开始运行").arg(m_DaoJiShiData.daoJiShiNumber / 1000));
        }
        m_DaoJiShiData.daoJiShiNumber--;
        if (m_DaoJiShiData.daoJiShiNumber <= 0) {
            qDebug() << "倒计时时间到!!!!" << m_DaoJiShiData.daoJiShiNumber;
            emit sendTimeStr(QString(""));

            emit sendTimerStart();
            if (m_DaoJiShiData.isRepeat) {
                m_IsStart = true;
                m_DaoJiShiData.daoJiShiNumber = ((m_DaoJiShiData.day * 24 * 60 * 60) + (m_DaoJiShiData.hour * 60 * 60) + (m_DaoJiShiData.minute * 60) + m_DaoJiShiData.second);
                m_DaoJiShiData.daoJiShiNumber *= 1000;
            }
            else {
                stopTimeRun();
                return;
            }
        }
    }
}

void TimerHandler::onTimerHandlerStart(int type, const QVariant &var)
{
    m_Type = type;
    if (type == 0) {
        m_JiHuaData = var.value<JiHuaData>();
        emit sendTimeStr(QString("计划:%1 开始运行").arg(m_JiHuaData.time.toString("yyyy-MM-dd\nhh:mm:ss")));
    }
    else if (type == 1) {
        m_DingShiData = var.value<DingShiData>();
        QString str = (m_DingShiData.isRepeat == 0) ? "只运行一次" : "每天运行";
        emit sendTimeStr(QString("定时:%1 \n%2 开始运行").arg(m_DingShiData.time.toString("hh:mm:ss")).arg(str));
    }
    else if (type == 2) {
        m_DaoJiShiData = var.value<DaoJiShiData>();

    }

    //qDebug() << "开始计时" << type;
    startTimeRun();
}

void TimerHandler::onNetworkFinish()
{
    if (reply->error() == QNetworkReply::NoError) {
        QByteArray responseData = reply->readAll();
        QJsonDocument jsonDoc = QJsonDocument::fromJson(responseData);
        QJsonObject jsonObj = jsonDoc.object();
        QString datetimeString = jsonObj["datetime"].toString();

        m_BeiJingTime = QDateTime::fromString(datetimeString, Qt::ISODate);
        m_IsGetSucceed = 1;
        //qDebug() << "m_BeiJingTime" <
    } else {
        m_IsGetSucceed = 0;
        qDebug() << "Error:" << reply->errorString();
    }
}

void TimerHandler::onReadStop()
{
    stopTimeRun();
}

void TimerHandler::startTimeRun()
{
    m_IsGetSucceed = -1;
    m_IsStart = true;
    if (!m_Timer->isActive()) {
        m_Timer->start();
    }
}

void TimerHandler::stopTimeRun()
{
    m_IsGetSucceed = -1;
    m_IsStart = false;
    if (m_Timer->isActive()) {
        m_Timer->stop();
        emit sendTimeStr("定时器被中断运行!");
    }
}

ui文件

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>TimerTaskWidget</class>
 <widget class="QWidget" name="TimerTaskWidget">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>329</width>
    <height>217</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>329</width>
    <height>217</height>
   </size>
  </property>
  <property name="maximumSize">
   <size>
    <width>329</width>
    <height>217</height>
   </size>
  </property>
  <property name="windowTitle">
   <string>TimerTaskWidget</string>
  </property>
  <layout class="QGridLayout" name="gridLayout_14">
   <item row="0" column="0">
    <layout class="QGridLayout" name="gridLayout">
     <property name="leftMargin">
      <number>5</number>
     </property>
     <property name="topMargin">
      <number>5</number>
     </property>
     <property name="rightMargin">
      <number>5</number>
     </property>
     <property name="bottomMargin">
      <number>5</number>
     </property>
     <property name="horizontalSpacing">
      <number>20</number>
     </property>
     <property name="verticalSpacing">
      <number>6</number>
     </property>
     <item row="1" column="0" colspan="3">
      <widget class="QStackedWidget" name="stackedWidget">
       <property name="currentIndex">
        <number>2</number>
       </property>
       <widget class="QWidget" name="page_JiHua">
        <layout class="QGridLayout" name="gridLayout_9">
         <item row="0" column="0">
          <layout class="QGridLayout" name="gridLayout_6">
           <item row="1" column="0" colspan="2">
            <widget class="QDateTimeEdit" name="dateTimeEdit_JiHua">
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>30</height>
              </size>
             </property>
             <property name="font">
              <font>
               <pointsize>15</pointsize>
              </font>
             </property>
             <property name="displayFormat">
              <string>yyyy/M/d H:mm:ss</string>
             </property>
             <property name="calendarPopup">
              <bool>false</bool>
             </property>
            </widget>
           </item>
           <item row="0" column="0">
            <widget class="QLabel" name="label">
             <property name="font">
              <font>
               <pointsize>11</pointsize>
              </font>
             </property>
             <property name="text">
              <string>选择时间类型：</string>
             </property>
            </widget>
           </item>
           <item row="0" column="1">
            <widget class="QComboBox" name="comboBox_JiHua_TimeType">
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>30</height>
              </size>
             </property>
             <item>
              <property name="text">
               <string>本地时间</string>
              </property>
             </item>
             <item>
              <property name="text">
               <string>北京时间</string>
              </property>
             </item>
            </widget>
           </item>
          </layout>
         </item>
        </layout>
       </widget>
       <widget class="QWidget" name="page_DingShi">
        <layout class="QGridLayout" name="gridLayout_12">
         <item row="0" column="0">
          <layout class="QGridLayout" name="gridLayout_11">
           <item row="1" column="0" colspan="2">
            <widget class="QDateTimeEdit" name="dateTimeEdit_DingShi">
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>30</height>
              </size>
             </property>
             <property name="font">
              <font>
               <pointsize>15</pointsize>
              </font>
             </property>
             <property name="displayFormat">
              <string>H:mm:ss</string>
             </property>
             <property name="calendarPopup">
              <bool>false</bool>
             </property>
            </widget>
           </item>
           <item row="0" column="0">
            <widget class="QLabel" name="label_2">
             <property name="font">
              <font>
               <pointsize>11</pointsize>
              </font>
             </property>
             <property name="text">
              <string>选择时间类型：</string>
             </property>
            </widget>
           </item>
           <item row="0" column="1">
            <widget class="QComboBox" name="comboBox_DingShi_TimeType">
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>30</height>
              </size>
             </property>
             <item>
              <property name="text">
               <string>本地时间</string>
              </property>
             </item>
             <item>
              <property name="text">
               <string>北京时间</string>
              </property>
             </item>
            </widget>
           </item>
           <item row="2" column="0">
            <widget class="QLabel" name="label_7">
             <property name="font">
              <font>
               <pointsize>11</pointsize>
              </font>
             </property>
             <property name="text">
              <string>重复：</string>
             </property>
            </widget>
           </item>
           <item row="2" column="1">
            <widget class="QComboBox" name="comboBox_DingShi">
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>30</height>
              </size>
             </property>
             <item>
              <property name="text">
               <string>只运行一次</string>
              </property>
             </item>
             <item>
              <property name="text">
               <string>每天运行</string>
              </property>
             </item>
             <item>
              <property name="text">
               <string>自定义</string>
              </property>
             </item>
            </widget>
           </item>
          </layout>
         </item>
        </layout>
       </widget>
       <widget class="QWidget" name="page_DaoJiShi">
        <layout class="QGridLayout" name="gridLayout_10">
         <item row="0" column="0">
          <layout class="QGridLayout" name="gridLayout_8">
           <item row="0" column="0">
            <layout class="QGridLayout" name="gridLayout_7">
             <property name="horizontalSpacing">
              <number>10</number>
             </property>
             <property name="verticalSpacing">
              <number>5</number>
             </property>
             <item row="1" column="0">
              <widget class="QLabel" name="label_4">
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="text">
                <string>分:</string>
               </property>
               <property name="alignment">
                <set>Qt::AlignCenter</set>
               </property>
              </widget>
             </item>
             <item row="0" column="1">
              <widget class="QSpinBox" name="spinBox_Day">
               <property name="minimumSize">
                <size>
                 <width>80</width>
                 <height>35</height>
                </size>
               </property>
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="maximum">
                <number>99999</number>
               </property>
              </widget>
             </item>
             <item row="0" column="0">
              <widget class="QLabel" name="label_6">
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="text">
                <string>天:</string>
               </property>
               <property name="alignment">
                <set>Qt::AlignCenter</set>
               </property>
              </widget>
             </item>
             <item row="0" column="3">
              <widget class="QSpinBox" name="spinBox_Hour">
               <property name="minimumSize">
                <size>
                 <width>80</width>
                 <height>35</height>
                </size>
               </property>
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="maximum">
                <number>99999</number>
               </property>
              </widget>
             </item>
             <item row="0" column="2">
              <widget class="QLabel" name="label_3">
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="text">
                <string>时:</string>
               </property>
               <property name="alignment">
                <set>Qt::AlignCenter</set>
               </property>
              </widget>
             </item>
             <item row="1" column="2">
              <widget class="QLabel" name="label_5">
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="text">
                <string>秒:</string>
               </property>
               <property name="alignment">
                <set>Qt::AlignCenter</set>
               </property>
              </widget>
             </item>
             <item row="1" column="1">
              <widget class="QSpinBox" name="spinBox_Minute">
               <property name="minimumSize">
                <size>
                 <width>80</width>
                 <height>35</height>
                </size>
               </property>
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="maximum">
                <number>99999</number>
               </property>
              </widget>
             </item>
             <item row="1" column="3">
              <widget class="QSpinBox" name="spinBox_Second">
               <property name="minimumSize">
                <size>
                 <width>80</width>
                 <height>35</height>
                </size>
               </property>
               <property name="font">
                <font>
                 <pointsize>11</pointsize>
                </font>
               </property>
               <property name="maximum">
                <number>99999</number>
               </property>
              </widget>
             </item>
             <item row="2" column="0" colspan="2">
              <layout class="QGridLayout" name="gridLayout_13">
               <property name="leftMargin">
                <number>15</number>
               </property>
               <item row="0" column="0">
                <widget class="QCheckBox" name="checkBox_DaoJiShi">
                 <property name="font">
                  <font>
                   <pointsize>11</pointsize>
                  </font>
                 </property>
                 <property name="text">
                  <string>重复运行</string>
                 </property>
                </widget>
               </item>
              </layout>
             </item>
            </layout>
           </item>
          </layout>
         </item>
        </layout>
       </widget>
      </widget>
     </item>
     <item row="0" column="2">
      <layout class="QGridLayout" name="gridLayout_2">
       <item row="0" column="0">
        <spacer name="horizontalSpacer">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="2">
        <spacer name="horizontalSpacer_2">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="1">
        <widget class="QRadioButton" name="radioButton_DaoJiShi">
         <property name="font">
          <font>
           <pointsize>11</pointsize>
          </font>
         </property>
         <property name="text">
          <string>倒计时器</string>
         </property>
         <property name="autoRepeat">
          <bool>true</bool>
         </property>
        </widget>
       </item>
      </layout>
     </item>
     <item row="2" column="0" colspan="3">
      <layout class="QGridLayout" name="gridLayout_4">
       <property name="horizontalSpacing">
        <number>15</number>
       </property>
       <property name="verticalSpacing">
        <number>0</number>
       </property>
       <item row="0" column="0">
        <spacer name="horizontalSpacer_5">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="3">
        <spacer name="horizontalSpacer_6">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="1">
        <widget class="QPushButton" name="pushButton_Save">
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>30</height>
          </size>
         </property>
         <property name="text">
          <string>开始计时</string>
         </property>
        </widget>
       </item>
       <item row="0" column="2">
        <widget class="QPushButton" name="pushButton">
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>30</height>
          </size>
         </property>
         <property name="text">
          <string>退出</string>
         </property>
        </widget>
       </item>
      </layout>
     </item>
     <item row="0" column="0">
      <layout class="QGridLayout" name="gridLayout_5">
       <item row="0" column="0">
        <spacer name="horizontalSpacer_7">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="1">
        <widget class="QRadioButton" name="radioButton_JiHua">
         <property name="font">
          <font>
           <pointsize>11</pointsize>
          </font>
         </property>
         <property name="text">
          <string>计划器</string>
         </property>
         <property name="checked">
          <bool>true</bool>
         </property>
         <property name="autoRepeat">
          <bool>true</bool>
         </property>
        </widget>
       </item>
       <item row="0" column="2">
        <spacer name="horizontalSpacer_8">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
      </layout>
     </item>
     <item row="0" column="1">
      <layout class="QGridLayout" name="gridLayout_3">
       <item row="0" column="2">
        <spacer name="horizontalSpacer_4">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="0">
        <spacer name="horizontalSpacer_3">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="0" column="1">
        <widget class="QRadioButton" name="radioButton_DingShi">
         <property name="font">
          <font>
           <pointsize>11</pointsize>
          </font>
         </property>
         <property name="text">
          <string>定时器</string>
         </property>
         <property name="autoRepeat">
          <bool>true</bool>
         </property>
        </widget>
       </item>
      </layout>
     </item>
    </layout>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

如何使用

    m_TimerTaskWidget = new TimerTaskWidget();
    m_TimerTaskWidget->setWindowModality(Qt::ApplicationModal);
    m_TimerTaskWidget->setAttribute(Qt::WA_ShowModal, true);
    connect(m_TimerTaskWidget, SIGNAL(sendTimerStart()), this, SLOT(onReadTimerStart()));
    connect(m_TimerTaskWidget, SIGNAL(sendTimeStr(QString)), this, SLOT(onReadTimerStr(QString)));

就这么简单
1.sendTimerStart是到点了通知，sendTimeStr是发送倒计时时间。
2.定时采用多线程操作防止卡主线程。

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