Problem with signalslot carrying pointer - qt

website qt connect signal to slot with parameter As can be seen, in a queued connection, the number of copies made depends on the type of the parameter in the signal and the argument in the qt connect signal to slot with parameter 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

qt connect signal to slot with parameter QObject::connect; Why the new connecting a signal with many arguments to a slot with less arguments   In the old-style syntax, you use the SIGNAL() and SLOT() macros to specify the signals and slots you want to connect Here's an example: In this  connect; signal parameters to the lambda

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