QComboBox currentIndexChanged 槽函数与connect写法

槽函数

    Q_OBJECT
public slots:
	void OnCombox1IndexChanged(const QString&);

槽函数定义

void Hydraulicslopedigitaltwin::OnCombox1IndexChanged(const QString& context)
{
	cout << "Hello Hydraulicslopedigitaltwin::" << std::endl;
}

connect写法：

	connect(ui.comboBox1, SIGNAL(currentIndexChanged(QString)),
		this, SLOT(OnCombox1IndexChanged(QString)));

插入数据的时候不发出信号：

	ui.comboBox1->blockSignals(true);
     //insert or delete items
	ui.comboBox1->blockSignals(false);