用C++实现一个简单的音乐播放器代码案例-QT开发中文网

以下是一个简单的音乐播放器代码案例，使用了C++和Qt框架：

#include <QApplication>
#include <QMediaPlayer>
#include <QMediaPlaylist>
#include <QFileDialog>

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

  QMediaPlayer player;
  QMediaPlaylist playlist;

  // 主窗口
  QWidget mainWindow;
  mainWindow.setWindowTitle("Music Player");
  mainWindow.show();

  // 播放列表
  QListView listView(&mainWindow);
  listView.setModel(playlist);
  listView.setSelectionMode(QAbstractItemView::SingleSelection);
  listView.setDragEnabled(true);
  listView.setAcceptDrops(true);
  listView.setDropIndicatorShown(true);
  listView.show();

  // 打开文件
  auto openFile = [&]() {
    QStringList files = QFileDialog::getOpenFileNames(
        &mainWindow, "Select Music Files", QDir::homePath(),
        "Music Files (*.mp3 *.wav *.ogg)");
    if (!files.empty()) {
      for (auto file : files) {
        playlist.addMedia(QUrl::fromLocalFile(file));
      }
      player.setPlaylist(&playlist);
      player.play();
    }
  };

  // 播放/暂停
  auto playPause = [&]() {
    if (player.state() == QMediaPlayer::PlayingState) {
      player.pause();
    } else {
      player.play();
    }
  };

  // 停止
  auto stop = [&]() { player.stop(); };

  // 上一曲
  auto previous = [&]() { playlist.previous(); };

  // 下一曲
  auto next = [&]() { playlist.next(); };

  // 添加控制按钮
  QPushButton openButton("Open", &mainWindow);
  QPushButton playPauseButton("Play/Pause", &mainWindow);
  QPushButton stopButton("Stop", &mainWindow);
  QPushButton previousButton("Previous", &mainWindow);
  QPushButton nextButton("Next", &mainWindow);

  openButton.move(10, 10);
  playPauseButton.move(100, 10);
  stopButton.move(210, 10);
  previousButton.move(310, 10);
  nextButton.move(410, 10);

  QObject::connect(&openButton, &QPushButton::clicked, openFile);
  QObject::connect(&playPauseButton, &QPushButton::clicked, playPause);
  QObject::connect(&stopButton, &QPushButton::clicked, stop);
  QObject::connect(&previousButton, &QPushButton::clicked, previous);
  QObject::connect(&nextButton, &QPushButton::clicked, next);

  return app.exec();
}

这个简单的音乐播放器实现了以下功能：