QT中实现音乐播放器的歌词显示代码？

以下是一个简单的示例代码，用于在QT中实现音乐播放器的歌词显示：

#include <QMainWindow>
#include <QMediaPlayer>
#include <QMediaPlaylist>
#include <QLabel>
#include <QTimer>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr)
        : QMainWindow(parent)
    {
        // 创建媒体播放器和播放列表
        player = new QMediaPlayer(this);
        playlist = new QMediaPlaylist(this);
        player->setPlaylist(playlist);

        // 创建标签用于显示歌词
        lyricsLabel = new QLabel(this);
        lyricsLabel->setAlignment(Qt::AlignCenter);
        lyricsLabel->setStyleSheet("font-size: 20px; color: white;");
        setCentralWidget(lyricsLabel);

        // 加载歌曲和歌词文件
        playlist->addMedia(QUrl::fromLocalFile("song.mp3"));
        loadLyrics("song.lrc");

        // 设置定时器用于更新歌词
        QTimer *timer = new QTimer(this);
        connect(timer, &QTimer::timeout, this, &MainWindow::updateLyrics);
        timer->start(100);

        // 播放歌曲
        player->play();
    }

private:
    QMediaPlayer *player;
    QMediaPlaylist *playlist;
    QLabel *lyricsLabel;
    QList<QPair<int, QString>> lyrics;

    void loadLyrics(const QString &fileName)
    {
        QFile file(fileName);
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
            return;

        lyrics.clear();

        QTextStream stream(&file);
        while (!stream.atEnd()) {
            QString line = stream.readLine();
            QStringList parts = line.split("]");
            for (int i = 0; i < parts.size() - 1; ++i) {
                QString timeStr = parts[i].mid(1);
                QTime time = QTime::fromString(timeStr, "mm:ss.zzz");
                int ms = time.minute() * 60000 + time.second() * 1000 + time.msec();
                QString text = parts.last();
                lyrics.append(qMakePair(ms, text));
            }
        }

        std::sort(lyrics.begin(), lyrics.end());
    }

    void updateLyrics()
    {
        int position = player->position();
        int index = -1;
        for (int i = 0; i < lyrics.size(); ++i) {
            if (lyrics[i].first > position) {
                break;
            }
            index = i;
        }
        QString text;
        if (index >= 0 && index < lyrics.size()) {
            text = lyrics[index].second;
        }
        lyricsLabel->setText(text);
    }
};

此代码假设歌词文件使用LRC格式，并且每行歌词都以时间戳为开头，格式为`[mm:ss.zzz]lyrics`。代码将歌词文件解析为一个包含时间和文本的QList，当播放器播放时，使用定时器更新当前播放位置的歌词。