Signal and Handler Event System

3, QML custom signal and signal processing function 4, QML calls the members variables, member functions, and signals of the C ++ class 1, QML object's

QML with String, int etc But the original data exchange with C++ remains a QVariant We now need a slot in QML to connect this signal to

qml signal slot SIGNAL(clicked()),this,SLOT(pPushButton_Test1_clicked())); connect qml export QT_QPA_FB_TSLIB=1 export ALSA_CONFIG_PATH=usrshare

slot global To do that, you need to add a signal in your QML file like that: signal buttonClicked And in our cpp, we need to connect the signal with a slot