QT day5

1.思维导图

2.实现闹钟

Widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QTime>
#include <QTimer>
#include <QTimerEvent>
#include <QTimeEdit>
#include <QtTextToSpeech>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
    void timerEvent(QTimerEvent *event);

private slots:
    void on_pushButton_clicked();

private:
    Ui::Widget *ui;
    int id;
    QtTextToSpeech *speecher;
};
#endif // WIDGET_H

Widget.cpp

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

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
}

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

//当定时器超时，自动执行该函数代码
void Widget::timerEvent(QTimerEvent *event)
{
    //获取系统时间
    QTime sys_time=QTime::currentTime();//获取当前系统时间
    //将系统时间转换成字符串
    QString s=sys_time.toString("hh::mm::ss");
    //将系统时间设置到UI界面中的Timelab中
    ui->lab2->setText(s);
    if(ui->lab2->text()==ui->lineEdit->text())
    {
        ui->lab1->setText("起床啦");
        speecher->say(ui->lab1->text());
    }
    //居中
    ui->lab1->setAlignment(Qt::AlignCenter);
}

//启动按钮对应的槽函数
void Widget::on_pushButton_clicked()
{
    if(ui->pushButton->text()=="启动")
    {
        id=startTimer(1000);
        ui->pushButton->setText("关闭");
    }
    else
    {
        //关闭一个定时器
        killTimer(id);
        ui->pushButton->setText("启动");
    }
}