基于qt的影音娱乐系统代码

以下是一个基于Qt的简单影音娱乐系统的代码示例，包含了播放器、视频列表和音频列表等功能：

mainwindow.h：

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMediaPlayer>
#include <QMediaPlaylist>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

private slots:
    void on_actionOpen_triggered();

    void on_playButton_clicked();

    void on_pauseButton_clicked();

    void on_stopButton_clicked();

    void on_previousButton_clicked();

    void on_nextButton_clicked();

    void on_videoList_doubleClicked(const QModelIndex &index);

    void on_audioList_doubleClicked(const QModelIndex &index);

private:
    Ui::MainWindow *ui;
    QMediaPlayer *player;
    QMediaPlaylist *playlist;
};

#endif // MAINWINDOW_H

mainwindow.cpp：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileDialog>
#include <QMessageBox>

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

    player = new QMediaPlayer(this);
    playlist = new QMediaPlaylist(player);

    //设置播放模式为循环播放
    playlist->setPlaybackMode(QMediaPlaylist::Loop);

    //将视频列表和音频列表设置为播放列表
    player->setPlaylist(playlist);

    //设置视频列表和音频列表为多选模式
    ui->videoList->setSelectionMode(QAbstractItemView::MultiSelection);
    ui->audioList->setSelectionMode(QAbstractItemView::MultiSelection);
}

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

void MainWindow::on_actionOpen_triggered()
{
    QStringList fileNames = QFileDialog::getOpenFileNames(this,
                                                          tr("Open File"), "",
                                                          tr("Video Files (*.mp4 *.avi);;Audio Files (*.mp3 *.wav)"));

    if(fileNames.isEmpty())
        return;

    //将选中的文件添加到播放列表中
    for(int i = 0; i < fileNames.size(); i++)
    {
        playlist->addMedia(QUrl::fromLocalFile(fileNames.at(i)));
    }

    //将选中的文件添加到视频列表或音频列表中
    for(int i = 0; i < fileNames.size(); i++)
    {
        QFileInfo fileInfo(fileNames.at(i));
        if(fileInfo.suffix() == "mp4" || fileInfo.suffix() == "avi")
        {
            ui->videoList->addItem(fileInfo.fileName());
        }
        else if(fileInfo.suffix() == "mp3" || fileInfo.suffix() == "wav")
        {
            ui->audioList->addItem(fileInfo.fileName());
        }
    }

    //如果没有正在播放，则播放第一个文件
    if(player->state() != QMediaPlayer::PlayingState)
    {
        player->play();
    }
}

void MainWindow::on_playButton_clicked()
{
    player->play();
}

void MainWindow::on_pauseButton_clicked()
{
    player->pause();
}

void MainWindow::on_stopButton_clicked()
{
    player->stop();
}

void MainWindow::on_previousButton_clicked()
{
    playlist->previous();
}

void MainWindow::on_nextButton_clicked()
{
    playlist->next();
}

void MainWindow::on_videoList_doubleClicked(const QModelIndex &index)
{
    //根据选中的视频文件索引，设置播放列表中的当前媒体
    playlist->setCurrentIndex(index.row());

    //开始播放
    player->play();
}

void MainWindow::on_audioList_doubleClicked(const QModelIndex &index)
{
    //根据选中的音频文件索引，设置播放列表中的当前媒体
    playlist->setCurrentIndex(ui->videoList->count() + index.row());

    //开始播放
    player->play();
}

此代码仅为示例，实际应用中可以根据需要进行修改和优化。