error: macro "SIGNAL" passed 3 arguments, but takes just 1
connect(ui->Btnshowhello,SIGNAL(clicked(bool)),this,SLOT(BtnshowhelloSlot()));【QT】error: macro "SIGNAL" passed 3 arguments, but takes just 1
原文：https://www.cnblogs.com/wxl845235800/p/10751791.html