c++ - 插槽在 QT 应用程序中未接收到信号

Question

我遇到了一个奇怪的情况，我有一个工作线程在做这件事，然后发出一个信号来回调 GUI 线程以关闭对话框。有人可以解释一下为什么会这样吗:

工作线程:

[Header]
signals:
    void writeComplete(void);

[Source]
void startWorkerThread()
{
    // do some stuff in boost::thread
    emit writeComplete();
}

主窗口子类:

burnDialog = new QProgressDialog("Writing to disc", "", 0, 0);
burnDialog ->setCancelButton(0);
QWidget::connect( discHandler.get(), SIGNAL(writeComplete()), burnDialog, SLOT(close()) );
QWidget::connect( discHandler.get(), SIGNAL(writeComplete()), this, SLOT(close()) );
burnDialog->open();
discHandler->startWorkerThread();

但这不是:

主窗口子类: [标题] 公共(public)插槽: void closeWithDialog(void);

[Source]
burnDialog = new QProgressDialog("Writing to disc", "", 0, 0);
QWidget::connect( discHandler.get(), SIGNAL(writeComplete()), this, SLOT(closeWithDialog()) );
burnDialog ->setCancelButton(0);
burnDialog->open();
discHandler->startWorkerThread();

void closeWithDialog()
{
    burnDialog->close();
    close();
}

Answer 1

感觉像... 我没有把Q_OBJECT放在头文件中。我假设子类继承 QMainWindow 的事实，Q_OBJECT 接口(interface)也将被隐式继承。但这不是...无论如何，谢谢你们的帮助!