class CustomSysmodel : public QFileSystemModel { Q_OBJECT public: CustomSysmodel(QWidget *parent = nullptr) : QFileSystemModel(parent) , m_limit(100) , m_timer(new QTimer(this)) , m_threadPool(new QThreadPool(this)) { connect(m_timer, &QTimer::timeout, this, &CustomSysmodel::loadMoreFiles); m_timer->setInterval(2000); } public slots: void fetchFiles(const QString &path) { emit started(); FileSystemWorker *worker = new FileSystemWorker(path); connect(worker, &FileSystemWorker::fileFound, this, &CustomSysmodel::fileFound); connect(worker, &FileSystemWorker::finished, this, &CustomSysmodel::finished); m_threadPool->start(worker); } private slots: void loadMoreFiles() { int rowCount = this->rowCount(); int diff = m_filePaths.size() - rowCount; if (diff > 0) { beginInsertRows(QModelIndex(), rowCount, rowCount + diff - 1); for (int i = rowCount; i < rowCount + diff && i < m_limit; i++) { QFileInfo fileInfo(m_filePaths.at(i)); QFileSystemModel::fetchMore(QFileSystemModel::index(fileInfo.path())); } endInsertRows(); } } signals: void started(); void finished(); void fileFound(const QString &filePath); private: int m_limit; QTimer *m_timer; QThreadPool *m_threadPool; }; class FileSystemWorker : public QObject, public QRunnable { Q_OBJECT public: FileSystemWorker(const QString &path, QObject *parent = nullptr) : QObject(parent) , m_path(path) { } void run() override { QFileInfoList files = QDir(m_path).entryInfoList(QDir::Files); foreach (const QFileInfo &fileInfo, files) { emit fileFound(fileInfo.absoluteFilePath()); } emit finished(); } signals: void started(); void finished(); void fileFound(const QString &filePath); private: QString m_path; }; 文件加载页面只有等全部文件加载完才能运行，分析原因，给出修改方案

原因是在加载文件时，使用了阻塞操作，导致界面卡死。解决方案是使用异步加载方式，将文件加载放在后台线程中进行，避免阻塞主线程。

修改方案如下：

1. 将文件加载操作放在后台线程中进行，使用QThreadPool来管理线程池。

2. 在CustomSysmodel的构造函数中，创建定时器m_timer，并设置定时器间隔为2000毫秒。

3. 在CustomSysmodel的fetchFiles函数中，创建FileSystemWorker对象，并将其放入线程池中运行，同时连接FileSystemWorker对象的fileFound信号和CustomSysmodel的fileFound槽函数，以便在后台线程中加载完文件后通知主线程。

4. 在CustomSysmodel的loadMoreFiles槽函数中，检查是否有新文件加载，如果有，则使用beginInsertRows和endInsertRows函数插入新行。

5. 在CustomSysmodel的构造函数中，连接m_timer的timeout信号和CustomSysmodel的loadMoreFiles槽函数，以定时检查是否有新文件需要加载。

修改后的代码如下：

class CustomSysmodel : public QFileSystemModel
{
    Q_OBJECT
public:
    CustomSysmodel(QWidget *parent = nullptr)
        : QFileSystemModel(parent)
        , m_limit(100)
        , m_timer(new QTimer(this))
        , m_threadPool(new QThreadPool(this))
    {
        connect(m_timer, &QTimer::timeout, this, &CustomSysmodel::loadMoreFiles);
        m_timer->setInterval(2000);
    }

public slots:
    void fetchFiles(const QString &path)
    {
        emit started();
        FileSystemWorker *worker = new FileSystemWorker(path);
        connect(worker, &FileSystemWorker::fileFound, this, &CustomSysmodel::fileFound);
        connect(worker, &FileSystemWorker::finished, this, &CustomSysmodel::finished);
        m_threadPool->start(worker);
    }

private slots:
    void loadMoreFiles()
    {
        int rowCount = this->rowCount();
        int diff = m_filePaths.size() - rowCount;
        if (diff > 0) {
            beginInsertRows(QModelIndex(), rowCount, rowCount + diff - 1);
            for (int i = rowCount; i < rowCount + diff && i < m_limit; i++) {
                QFileInfo fileInfo(m_filePaths.at(i));
                QFileSystemModel::fetchMore(QFileSystemModel::index(fileInfo.path()));
            }
            endInsertRows();
        }
    }

signals:
    void started();
    void finished();
    void fileFound(const QString &filePath);

private:
    int m_limit;
    QTimer *m_timer;
    QThreadPool *m_threadPool;
};

class FileSystemWorker : public QObject, public QRunnable
{
    Q_OBJECT
public:
    FileSystemWorker(const QString &path, QObject *parent = nullptr)
        : QObject(parent)
        , m_path(path)
    {
    }

    void run() override
    {
        QFileInfoList files = QDir(m_path).entryInfoList(QDir::Files);
        foreach (const QFileInfo &fileInfo, files) {
            emit fileFound(fileInfo.absoluteFilePath());
        }
        emit finished();
    }

signals:
    void started();
    void finished();
    void fileFound(const QString &filePath);

private:
    QString m_path;
};