Properly process QNetworkAccessManager response

[Swiftie]

Hello!
How properly pass callback or call user function while finish() emmited?
I can't pass like that:

typedef void(*ptr)(const void *);
...
public slots:
    void reply(QNetworkReply* reply, ptr);
...
connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*, ptr)));

typedef void(*ptr)(const void *);
...
public slots:
    void reply(QNetworkReply* reply, ptr);
...
connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*, ptr)));

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Due to incompatible sender/receiver arguments.

Please explain some response processing "technics".

Best regards.