How to Use Signals and Slots in Two Classes in Qt Creator

How to Use Signals and Slots in Two Classes in Qt Creator signal and slot To use signals and slots for implementing loose coupling, it must be easy to connect signals and slots that only partially match signatures signal and slot qt connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(pushButton_Clicked())); With this syntax, the button clicked() signal will be received by MainWindow

signal and slot qt Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal Qt's signals and slots mechanism

signal and slot arguments are not compatible As for priority, the slot of the latter signal will be handled when the event loop is returned to the object However, it is impossible to connect two slots Slot Arguments Signals can propagate arguments to each of the slots they call For instance, a signal that propagates mouse motion