Question

我正在尝试在单独的线程上填充QTreeView对象。我想写入的信息是网络驱动器上的文件夹+文件列表。迭代子目录需要花费很多时间，因此我不想在此操作期间阻止Gui线程。

这是我的代码：

class Worker : public QObject
{
    Q_OBJECT

public slots:

    void doWork(QString &parameter){

        QString data;

        QDirIterator it(parameter, QStringList() << "*.xml", QDir::Files, QDirIterator::Subdirectories);
        while (it.hasNext()) {
            QString currentFile = it.next();
            emit resultReady(currentFile);
        }
    }

    signals:
        void resultReady(QString &result);
    };

class iUSMDatabaseComposerWindow:public QMainWindow{
        Q_OBJECT
        ...

        QThread workerThread;
        QEventLoop loop;
    public:
        iUSMDatabaseComposerWindow(){
        Worker *worker = new Worker;
        worker->moveToThread(&workerThread);

        bool success = connect(&workerThread, SIGNAL(finished()), worker, SLOT(deleteLater())); assert(success);
        success = connect(this, SIGNAL(getFilesInFolder(QString &)), worker, SLOT(doWork(QString &))); assert(success);
        success = connect(worker, SIGNAL(resultReady(QString &)), this, SLOT(appendToTree(QString &))); assert(success);

        //For Qt5 : connect( &workerThread, &QThread::started, &loop, &QEventLoop::quit );
        success = connect( &workerThread, SIGNAL( started() ), &loop, SLOT( quit() ), Qt::DirectConnection ); assert(success);
        workerThread.start();
        loop.exec(); // wait for thread initialization

        QString targetFolder (TARGETFOLDER);
        emit getFilesInFolder(targetFolder);
    }
    signals:
        void getFilesInFolder(QString &folderToProcess);
    private slots:
        void appendToTree(QString &file);

我遇到的是connect（）是成功的但是工作人员的插槽（doWork）永远不会被emit getFilesInFolder（targetFolder）调用。我注意到如果我在连接到doWork（）插槽时添加Qt :: DirectConnection，它会调用它。

这可能是什么问题？

在单独的线程上填充，填充QTreeView树

0 个答案: