QtC++ - Lesson 024 Signals and Slot in Qt5

Signals and slots can take any number of arguments of any type They are completely typesafe: no more callback core dumps! All classes that inherit from QObject

To successfully connect a signal to a slot , they must have the same parameter types in the same order: connect(ftp,

signal slot qt The slot does not exist for the given receiver ; The signalslot argument lists is not compatible The elements marked with a do not

signal slot SignalType::Arguments, typename SlotType::Arguments>::value), 256, Signal and slot arguments are not compatible ); 257, Q_STATIC_ASSERT_X((QtPrivate