tableWidget->viewport()->installEventFilter(this);bool Widget::eventFilter(QObject *object, QEvent *event){ if (object == tableWidget->viewport()) { if(event->type() == QEvent::KeyPress) { qDebug()<<"THIS IS keypress"; QKeyEvent* pKeyEvent = static_cast<QKeyEvent *>(event); if(pKeyEvent->key() == Qt::Key_Space) { qDebug()<<"now it's key_space"; keyJudge = true; } } }}我这里怎么也不能再tablewidget里面获取从键盘输入的空格键,为什么呀