Qt实现闹钟小程序

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTimeEdit>
#include <QTimer>
#include <QLabel>
#include <QMediaPlayer>
#include <QLineEdit>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
 Q_OBJECT

public:
 explicit MainWindow(QWidget *parent = 0);
 ~MainWindow();

private slots:
 void TimerResponse();

 void on_pushButton_clicked();

 void on_pushButton_2_clicked();

 void on_radioButton_clicked();

 void on_radioButton_2_clicked();

 void on_radioButton_3_clicked();



 void on_pushButton_3_clicked();

private:
 Ui::MainWindow *ui;
 QTimeEdit *timeEdit;
 QLabel *label_2;
 QTime Temp;
 QLineEdit *lineEdit;
 QMediaPlayer *player = new QMediaPlayer;
 QTimer *myTimer = new QTimer(this);
};

#endif // MAINWINDOW_H

QT  += multimedia

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDateTime>
#include <QTime>

int tt = 0;
MainWindow::MainWindow(QWidget *parent) :
 QMainWindow(parent),
 ui(new Ui::MainWindow)
{

 ui->setupUi(this);
 ui->label_2->setVisible(false);
 QObject::connect(myTimer, SIGNAL(timeout()),
      this, SLOT(TimerResponse()) );
 ui->pushButton->setDisabled(true); //进去后，失能开始 按钮

}

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


void MainWindow::on_pushButton_clicked()
{

 myTimer->start(500);   //star 按下,启动定时器

 Temp = ui->timeEdit->time(); //获取时钟编辑器的值 ，为后续 系统时间的比较做准备

}

void MainWindow::TimerResponse() //不断检查是否 定时时间到
{
 if (Temp.hour() == QTime::currentTime().hour() &&
     Temp.minute() == QTime::currentTime().minute() )
  //开始响铃
 {
  ui->label_2->setVisible(true);
  player->play();
  myTimer->setSingleShot(true); //每次到点只能响铃一次
 }

}

void MainWindow::on_pushButton_2_clicked()
{
 tt++;
 if(tt == 10) tt = 0;
  else if(tt%2 == 1)
  player->play();
   else
    player->stop();
}



void MainWindow::on_radioButton_clicked()  //选中铃声1
{
 ui->pushButton->setEnabled(true);
 player->setVolume(30);
 player->setMedia(QUrl::fromLocalFile("C:/Users/Zhangkai/Desktop/Qt_Example/demo7/邱永传 - 伤心你的堕落.mp3"));
 ui->lineEdit->setText("邱永传 - 伤心你的堕落.mp3");
}

void MainWindow::on_radioButton_2_clicked() //选择铃声2
{
 ui->pushButton->setEnabled(true);
 player->setVolume(30);
 player->setMedia(QUrl::fromLocalFile("C:/Users/Zhangkai/Desktop/Qt_Example/demo7/邱永传 - 十一年.mp3"));
 ui->lineEdit->setText("邱永传 - 十一年.mp3");

}

void MainWindow::on_radioButton_3_clicked() //选择铃声3
{

 ui->pushButton->setEnabled(true);
 player->setVolume(30);
 player->setMedia(QUrl::fromLocalFile("C:/Users/Zhangkai/Desktop/Qt_Example/demo7/邱永传 - 十二年.mp3"));
 ui->lineEdit->setText("邱永传 - 十二年.mp3");

}

void MainWindow::on_pushButton_3_clicked()
{
 myTimer->setSingleShot(false); // 重置后，有意可以为下次准备响铃
 ui->label_2->setVisible(false);
 player->stop();
}