Widget.cpp

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    objtimer = new QTimer (this);
    //连接定时器的timeout信号到启动的槽函数
    //connect(objtimer,&QTimer::timeout,this,&Widget::timeout_slto);
    sp =new QTextToSpeech(this);
    //初始化定时器id
    timerId = -1;

}

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


void Widget::on_pushButton_clicked()
{
    if(timerId==-1){
   timerId = startTimer(1000);
}
}

/*void Widget::timeout_slto()
{
    QTime sysTime = QTime::currentTime();
    QString time = sysTime.toString("hh:mm:ss");
    ui->label->setText(time);

}*/
//定时器处理函数的实现
void Widget::timerEvent(QTimerEvent *t)
{
    if(t->timerId() == timerId){
    QTime sytime = QTime::currentTime();
    QString t2 =sytime.toString("hh:mm:ss");
    ui->label->setText(t2);//更新标签显示时间

    QString  time1 = ui->lineEdit->text();
    if(t2==time1)
    {
        sp->say("还睡呢，收你们来了");
    }
}
}
void Widget::on_pushButton_2_clicked()
{
    //objtimer->stop();
    killTimer(timerId);
}

 Widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include<QTime>
#include<QTimer>
#include<QTimerEvent>
#include<QTextToSpeech>


QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
    //重写定时器事件处理函数
    void timerEvent(QTimerEvent *t) override;
private slots:
    void on_pushButton_clicked();
    //void timeout_slto();

    void on_pushButton_2_clicked();



private:
    Ui::Widget *ui;

    //定义一个定时器指针
    QTimer *objtimer;
    //定义一个播报员指针

    QTextToSpeech *sp;
    int timerId;

};
#endif // WIDGET_H