你需要使用 QKeyEvent 类来获取键盘事件。

You need to use QKeyEvent class to get keyboard events. You can catch keyboard event as below

void yourClass :: keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_P)
        qDebug() << "Key P is Pressed";
}

如果您没有收到键盘事件，请选中此链接

If you are not getting keyboard events at all then you check this link