D05: Qt 信號槽signalslot

From io: QApplication Class: The QApplication class connect the custom signal to the custom slot Output: Python PyQt

Slots can have parameters that receive data from the emitting signal Connect: You can connect a signal to a slot using the QObject::connect

qt slot The activated() signal of each QSocketNotifier is connected to the appropriate slot function, which effectively converts the Unix signal to the

qt slot signal Since Qt uses a mechanism called signals and slots, it makes the callback function weakly coupled to the event Also, we usually use the terms signal and slot