Qt QCombobox currentIndexChanged信号

Question

如何从一个ComboBox获取ItemIndex并发送到另一个ComboBox？两个Comb都是在QTableWidget中创建的

QComboBox *comboA = static_cast<QComboBox*>(ui->tableWidget->cellWidget(0,0));
QComboBox *comboB = static_cast<QComboBox*>(ui->tableWidget->cellWidget(0,1));
QObject::connect(comboA, SIGNAL(currentIndexChanged(int)),comboB, SLOT(setCurrentIndex(int)));

但是这段代码不起作用。相反，有必要为指针定义新的方法。