头文件：

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include<QTime>//时间类
#include<QTimerEvent>//定时器事件类
#include<QtTextToSpeech> //语言播报类
#include<QPushButton>
namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = nullptr);~Widget();void timerEvent(QTimerEvent *e);//定时器事件函数的重写声明private slots:void on_pushButton_clicked();private:Ui::Widget *ui;int id;//创建一个语言播报者QTextToSpeech *speecher;int temp=0;
};#endif // WIDGET_H

源文件：

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{speecher=new QTextToSpeech(this);ui->setupUi(this);id=startTimer(1000);//给语音播报者实例化空间speecher = new QTextToSpeech(this);
}Widget::~Widget()
{delete ui;
}
//当定时器超时时，自动执行这个函数void Widget::timerEvent(QTimerEvent *e)
{if(e->timerId()==id){//获取系统时间QTime sys_time = QTime::currentTime();//将类型转换QString s = sys_time.toString("hh:mm:ss");//将系统时间放入ui界面的label中ui->label->setText(s);if(1==temp&&ui->lineEdit->text()==ui->label->text()){for(int i=0;i<5;i++){speecher->say(ui->label_3->text());}}//居中显示ui->label->setAlignment(Qt::AlignCenter);}
}void Widget::on_pushButton_clicked()
{if(ui->pushButton->text()=="启动"){temp=1;ui->pushButton->setText("关闭");}else {temp=0;//killTimer(id);ui->pushButton->setText("启动");}
}