Qt自制一个小闹钟的实现示例

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

#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

#include "widget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

#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();
}