QT 使用定时器完成闹钟

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

void Widget::timestart()
{
    timer.start(1000);
}

void Widget::timeend()
{
    timer.stop();
}


Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    
    ui->setupUi(this);
    this->resize(800,550);
    this->setFixedSize(800,550);
    this->setWindowTitle("Alarm");

    lab1 = new QLabel(this);
    lab1->resize(360,120);
    lab1->move(80,80);
    lab1->setStyleSheet("background-color:rgb(225, 255, 248);font: 36pt;border-radius:10px");

    txtedt = new QTextEdit(this);
    txtedt->resize(650,250);
    txtedt->move(80,250);
    txtedt->setStyleSheet("background-color:rgb(225, 255, 248);font: 36pt;border-radius:10px");

    linedt1 = new QLineEdit(this);
    linedt1->resize(250,50);
    linedt1->move(480,80);
    linedt1->setPlaceholderText("预定时间");
    linedt1->setStyleSheet("background-color:rgb(225, 255, 248);font: 36pt;border-radius:10px");

    btn1 = new QPushButton("启动",this);
    btn1->resize(125,50);
    btn1->move(480,150);
    btn1->setStyleSheet("background-color:rgb(225, 255, 248);font: 36pt;border-radius:10px");

    QPushButton *btn2 = new QPushButton("停止",this);
    btn2->resize(125,50);
    btn2->move(610,150);
    btn2->setStyleSheet("background-color:rgb(225, 255, 248);font: 36pt;border-radius:10px");

    speecher = new QTextToSpeech;
    connect(btn1, &QPushButton::clicked, this, &Widget::timestart);
    connect(btn2, &QPushButton::clicked, this, &Widget::timeend);
    connect(&timer,&QTimer::timeout,this,&Widget::timer_slots);
    connect(&timer,&QTimer::timeout,this,&Widget::timealarm);
}

Widget::~Widget()
{
    delete ui;
}
void Widget::timer_slots()
{
    QTime sysTime = QTime::currentTime();

    QString time = sysTime.toString("hh : mm : ss");

    lab1->setText(time);
}

void Widget::timealarm()
{
    QTime sysTime = QTime::currentTime();
    //将Qtime转换为Qstring
    QString time = sysTime.toString("hh:mm:ss");

     if(linedt1->text()==time)
    {
        QString msg = txtedt->toPlainText();
        speecher->say(msg);
    }
}

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QLabel>
#include <QTextEdit>
#include <QLineEdit>
#include <QPushButton>
#include <QTimer>       //定时器类
#include <QTime>
#include <QTimerEvent>
#include <QDateTime>
#include <QtTextToSpeech>           //文本转语音类
#include <QDebug>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT
public slots:
    void timestart();
    void timeend();
    void timer_slots();
    void timealarm();
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private:
    Ui::Widget *ui;
    int tid = 0;
    QTimer timer;
    QPushButton *btn1;
    QLabel *lab1;
    QTextToSpeech *speecher;
    QLineEdit *linedt1;
    QTextEdit *txtedt;
};
#endif // WIDGET_H