由于我是AI语言模型，无法直接生成qt文件，请参考以下代码作为参考：

main.cpp

#include #include “mainwindow.h”

int main(int argc, char *argv[]) {

QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();

}

mainwindow.h

#ifndef MAINWINDOW_H #define MAINWINDOW_H

#include #include #include #include #include

QT_BEGIN_NAMESPACE namespace Ui { class MainWindow; } QT_END_NAMESPACE

class MainWindow : public QMainWindow {

Q_OBJECT

public:

MainWindow(QWidget *parent = nullptr);
~MainWindow();

private slots:

void on_actionOpen_triggered();

void on_actionQuit_triggered();

void on_playButton_clicked();

void on_pauseButton_clicked();

void on_stopButton_clicked();

void on_volumeSlider_valueChanged(int value);

void on_positionSlider_valueChanged(int value);

void on_durationChanged(qint64 duration);

void on_positionChanged(qint64 position);

void on_playlistButton_clicked();

void on_addButton_clicked();

void on_removeButton_clicked();

void on_clearButton_clicked();

private:

Ui::MainWindow *ui;
QMediaPlayer *player;
QMediaPlaylist *playlist;
bool isPlaying;

};

#endif // MAINWINDOW_H

mainwindow.cpp

#include “mainwindow.h” #include “ui_mainwindow.h”

MainWindow::MainWindow(QWidget *parent)

: QMainWindow(parent)
, ui(new Ui::MainWindow)

{

ui->setupUi(this);
player = new QMediaPlayer(this);
playlist = new QMediaPlaylist(player);
player->setPlaylist(playlist);
ui->positionSlider->setRange(0, 0);
connect(player, SIGNAL(durationChanged(qint64)), this, SLOT(on_durationChanged(qint64)));
connect(player, SIGNAL(positionChanged(qint64)), this, SLOT(on_positionChanged(qint64)));

}

MainWindow::~MainWindow() {

delete ui;
delete player;
delete playlist;

}

void MainWindow::on_actionOpen_triggered() {

QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), "/", tr("Video Files (*.mp4 *.avi);;Audio Files (*.mp3)"));
if (!fileName.isEmpty()) {
    playlist->addMedia(QUrl::fromLocalFile(fileName));
    ui->playlistWidget->addItem(QFileInfo(fileName).fileName());
}

}

void MainWindow::on_actionQuit_triggered() {

QApplication::quit();

}

void MainWindow::on_playButton_clicked() {

if (playlist->currentIndex() < 0) return;
player->play();
isPlaying = true;

}

void MainWindow::on_pauseButton_clicked() {

if (isPlaying) {
    player->pause();
    isPlaying = false;
} else {
    player->play();
    isPlaying = true;
}

}

void MainWindow::on_stopButton_clicked() {

player->stop();
isPlaying = false;

}

void MainWindow::on_volumeSlider_valueChanged(int value) {

player->setVolume(value);

}

void MainWindow::on_positionSlider_valueChanged(int value) {

player->setPosition(value);

}

void MainWindow::on_durationChanged(qint64 duration) {

ui->positionSlider->setRange(0, duration);

}

void MainWindow::on_positionChanged(qint64 position) {

ui->positionSlider->setValue(position);

}

void MainWindow::on_playlistButton_clicked() {

ui->playlistWidget->setVisible(!ui->playlistWidget->isVisible());

}

void MainWindow::on_addButton_clicked() {

QString fileName = QFileDialog::getOpenFileName(this, tr("Add File"), "/", tr("Video Files (*.mp4 *.avi);;Audio Files (*.mp3)"));
if (!fileName.isEmpty()) {
    playlist->addMedia(QUrl::fromLocalFile(fileName));
    ui->playlistWidget->addItem(QFileInfo(fileName).fileName());
}

}

void MainWindow::on_removeButton_clicked() {

int index = ui->playlistWidget->currentRow();
if (index >= 0) {
    playlist->removeMedia(index);
    delete ui->playlistWidget->takeItem(index);
}

}

void MainWindow::on_clearButton_clicked() {

playlist->clear();
ui->playlistWidget->clear();

}

ui_mainwindow.h

<?xml version=“1.0” encoding=“UTF-8”?> MainWindow

<x>0</x>
<y>0</y>
<width>400</width>
<height>300</height>

Media Player

<item>
 <widget class="QLabel" name="titleLabel">
  <property name="text">
   <string>Media Player</string>
  </property>
  <property name="alignment">
   <set>Qt::AlignCenter</set>
  </property>
 </widget>
</item>
<item>
 <widget class="QVideoWidget" name="videoWidget"/>
</item>
<item>
 <widget class="QSlider" name="positionSlider">
  <property name="orientation">
   <enum>Qt::Horizontal</enum>
  </property>
 </widget>
</item>
<item>
 <layout class="QHBoxLayout" name="horizontalLayout">
  <item>
   <widget class="QPushButton" name="playButton">
    <property name="text">
     <string>Play</string>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QPushButton" name="pauseButton">
    <property name="text">
     <string>Pause</string>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QPushButton" name="stopButton">
    <property name="text">
     <string>Stop</string>
    </property>
   </widget>
  </item>
 </layout>
</item>
<item>
 <layout class="QHBoxLayout" name="horizontalLayout_2">
  <item>
   <widget class="QLabel" name="volumeLabel">
    <property name="text">
     <string>Volume:</string>
    </property>
    <property name="alignment">
     <set>Qt::AlignRight</set>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QSlider" name="volumeSlider">
    <property name="orientation">
     <enum>Qt::Vertical</enum>
    </property>
   </widget>
  </item>
 </layout>
</item>
<item>
 <layout class="QHBoxLayout" name="horizontalLayout_3">
  <item>
   <widget class="QPushButton" name="playlistButton">
    <property name="text">
     <string>Show Playlist</string>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QWidget" name="playlistWidget">
    <layout class="QVBoxLayout" name="playlistLayout"/>
   </widget>
  </item>
 </layout>
</item>
<item>
 <layout class="QHBoxLayout" name="horizontalLayout_4">
  <item>
   <widget class="QPushButton" name="addButton">
    <property name="text">
     <string>Add File</string>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QPushButton" name="removeButton">
    <property name="text">
     <string>Remove File</string>
    </property>
   </widget>
  </item>
  <item>
   <widget class="QPushButton" name="clearButton">
    <property name="text">
     <string>Clear Playlist</string>
    </property>
   </widget>
  </item>
 </layout>
</item>

<rect>
 <x>0</x>
 <y>0</y>
 <width>400</width>
 <height>25</height>
</rect>

<property name="title">
 <string>File</string>
</property>
<addaction name="actionOpen"/>
<addaction name="actionQuit"/>

<string>Open...</string>

<string>Quit</string>

media_player.pro

QT += core gui multimediawidgets multimedia

CONFIG += c++11

TARGET = media_player TEMPLATE = app

INCLUDEPATH += .

Source files

SOURCES += main.cpp

       mainwindow.cpp

Header files

HEADERS += mainwindow.h

UI files

FORMS += ui_mainwindow.h

Resource files

RESOURCES +=

win32:RC_ICONS += icon.ico

macx:ICON = icon.icns