Qt::sender()

 

 

// 通过指针绑定槽函数
Button *createButton(const QString &text, const char *slotFunc)
{
    Button *button = new Button(text);
    connect(button, SIGNAL(clicked()), this, slotFunc);
    return button;
}

Button *pointButton = createButton(tr("."), SLOT(pointClicked()));

//多个控件绑定同一个槽函数，使用sender()获取发送者
Button *clickedButton = qobject_cast<Button *>(sender());
QString clickedOperator = clickedButton->text();