day52——QT闹钟

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QTextEdit>
#include <QVBoxLayout>
#include <QTimer>
#include <QDateTime>
#include<stdio.h>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:

    void on_btn1_clicked();
    void on_btn2_clicked();
void updateTime();


private:
    Ui::Widget *ui;
     QTimer *timer;
     int num;
};
#endif // WIDGET_H

main.cpp

#include "widget.h"

#include <QApplication>

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

widget.cpp

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

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &Widget::updateTime);
    timer->start(1000);
}

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

void Widget::on_btn1_clicked()
{
    num=1;
    ui->label2->setText("闹钟已开启");
}

void Widget::on_btn2_clicked()
{
    num=0;
    ui->label2->setText("闹钟已关闭");
    ui->textEdit->clear();
}

void Widget::updateTime()
{
    QDateTime currentDateTime = QDateTime::currentDateTime();
    QString currentTimeStr = currentDateTime.toString("hh:mm:ss");
    ui->label1->setText(currentTimeStr);
    if (num==1){
        QString alarmTimeStr = ui->lineEdit->text();
        QTime alarmTime = QTime::fromString(alarmTimeStr, "hh:mm");
        if (currentDateTime.time().hour() == alarmTime.hour() && currentDateTime.time().minute() == alarmTime.minute()) {
            ui->textEdit->setText("起床了！");
        } else {
            ui->textEdit->clear();
        }
    }
}