小闹钟 

功能

.pro文件

QT       += core gui texttospeech
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    widget.cpp

HEADERS += \
    widget.h

FORMS += \
    widget.ui

# Default rules for deployment.
qnx: target.path = /tmp/${TARGET}/bin
else: unix:!android: target.path = /opt/${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES += \
    Icon.qrc

widget.h文件

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QTimer>      //定时器类
#include <QTime>       //时间类
#include <QTimerEvent>   //定时器事件类的头文件
#include <QDateTime>     //日期时间类
#include <QDateTimeEdit>
#include <QDebug>
#include <QTextToSpeech>    //朗读
#include <QTextEdit>
#include <QMetaObject>
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 *event)override;



signals:
    void my_signal();
private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();


private:
    Ui::Widget *ui;
    //定义一个定时器的id
    int timer_id;        //基于事件处理函数的定时器
    int timer_id1;
    QTextToSpeech *speech;
    int i = 0;
    int flag = 0;
    QString text;
    QDateTime sys_dt;


};
#endif // WIDGET_H

main.cpp文件

#include "widget.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

widget.cpp文件

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

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setWindowTitle("小闹钟");
    timer_id = this->startTimer(5);
    ui->pushButton_2->setEnabled(false);
    ui->textEdit->setPlaceholderText("请输入闹钟响时播报的内容");
    this->setWindowIcon(QIcon(":/new/prefix1/666.png"));

}

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

void Widget::timerEvent(QTimerEvent *event)
{
    if(event->timerId()) //== timer_id)  //用来判断不同的定时器的id
    {
        //获取当前系统的日期时间
        sys_dt = QDateTime::currentDateTime();
        //展示时间到ui界面的lable2中
        ui->label->setText(sys_dt.toString("yyyy-MM-dd hh:mm:ss"));
        //居中显示               标签文本对齐方式
        ui->label->setAlignment(Qt::AlignCenter);

        ui->label->setFont(QFont("微软雅黑",20));

        QString timeText = sys_dt.toString("yyyy-MM-dd hh:mm:ss");
        QString timeText1 = ui->dateTimeEdit->text();
        if(flag == 1)
        {

            if(timeText1 == timeText)
            {
                speech->say(text); // 朗读文本

            }
        }
    }
}
void Widget::on_pushButton_clicked()
{
    flag = 1;
    speech = new QTextToSpeech;
    text = ui->textEdit->toPlainText();
    ui->pushButton_2->setEnabled(true);
    ui->pushButton->setEnabled(false);
    ui->textEdit->setEnabled(false);
    ui->dateTimeEdit->setEnabled(false);
}

void Widget::on_pushButton_2_clicked()
{
    flag = 0;
    ui->pushButton->setEnabled(true);
    ui->pushButton_2->setEnabled(false);
    ui->textEdit->setEnabled(true);
    ui->dateTimeEdit->setEnabled(true);
    speech->stop();
}

widget.ui文件