QSettings -当用户删除文件时如何执行？

#include <QSettings>

QSettings settings("YourCompany", "YourApp");

QString fileName = "example.txt";
settings.setValue(fileName, QDateTime::currentDateTime());

#include <QTimer>

QTimer *timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, [=]() {
    checkDeletedFiles(settings);
});
timer->start(60000); // 每60秒检查一次

void checkDeletedFiles(QSettings &settings) {
    QStringList keys = settings.allKeys();
    for (const QString &key : keys) {
        QFileInfo fileInfo(key);
        if (!fileInfo.exists()) {
            // 文件已被删除，执行相应操作
            qDebug() << "文件已删除:" << key;
        }
    }
}