slot版
void(QListWidget::*itemClicked2)(QListWidgetItem*) = &QListWidget::itemClicked;
connect(ui.listWidget, itemClicked2, this, &MainWidget::YourFuntion);
void MainWidget::YourFuntion(QListWidgetItem *item)
{
YourCode
}
lamda版
connect(ui.listWidget, &QListWidget::itemClicked, this, [=](QListWidgetItem*) {
YourCode
});
Qt4版 未测试
connect(&subWin, SIGNAL(backSignal()), this, SLOT(backSlot()));
connect(&subWin, SIGNAL(backSignal(QString)), this, SLOT(logSlot(QString)));
更多细节参考
https://www.cnblogs.com/raina/p/11315108.html