Ich habe eine Klasse in Qt mit dem Creator erstellt. der Aufruf der Funktion "SetOnLCD128x64()" funktioniert problemlos. Beim Connect-Befehl klappt es leider nicht.

 

   cltf128x64* cl_lcd = new cltf128x64();  // cltf128x64 ist in separater Header und Sourcecode-Datei deklariert/definiert 

    cl_lcd->SetOnLCD128x64(); // funktioniert

    connect(ui->pBuLCD2SetOn, &QPushButton::clicked, &cl_lcd, &cltf128x64::SetOnLCD128x64); // verursacht Fehler

die Fehlermeldung:

uwMainWindow.cpp:40:5: No matching member function for call to 'connect'
qobject.h:200:36: candidate function not viable: no known conversion from 'void (QAbstractButton::*)(bool)' to 'const char *' for 2nd argument
qobject.h:203:36: candidate function not viable: no known conversion from 'void (QAbstractButton::*)(bool)' to 'const QMetaMethod' for 2nd argument
qobject.h:396:41: candidate function not viable: no known conversion from 'void (QAbstractButton::*)(bool)' to 'const char *' for 2nd argument
qobject.h:221:9: candidate template ignored: substitution failure [with Func1 = void (QAbstractButton::*)(bool), Func2 = void (cltf128x64::*)()]: no type named 'ContextType' in 'QtPrivate::ContextTypeForFunctor<void (cltf128x64::*)()>'
qobject.h:270:9: candidate function template not viable: requires 3 arguments, but 4 were provided

 

Hat jemand eine Idee woran's hängt.

Vielen Dank

Uwe

Hast du im Header die SetOnLCD128x64 Funktion in einem "public slots:" Anschnitt stehen?

Ja:

/*!
 * @file    cltf128x64.h
 * @brief    Declaration of the LCD128x64-class WIT QObject
 * @date    2024-11-03
 * @version    00
 */
#ifndef CLTF128X64_H
#define CLTF128X64_H

#include "ip_connection.h"
#include "bricklet_lcd_128x64.h"
#include <QObject>  //brauchen wir für "QT_BEGIN_NAMESPACE"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \defgroup cltf128x64 Klasse für TF-Steuerung
*/

/*!
* \ingroup cltf128x64
* @brief Nothing special.\n
*/
#define UID_LCD128X64 "R3t"

/*!
* \ingroup cltf128x64
* @brief Nothing special.\n
*/
#define HOST "localhost"

/*!
* \ingroup cltf128x64
* @brief Nothing special.\n
*/
#define PORT 4223

QT_BEGIN_NAMESPACE
namespace Ui {
class cltf128x64;
}
QT_END_NAMESPACE

class cltf128x64
{
    Q_OBJECT
/******************************************************************************/
public:

/*!
* \ingroup cltf128x64
* .h: Constructor of the class "cltf128x64"\n
* Nothing special.\n
* @brief Constructor of the class "cltf128x64"
*/
    cltf128x64();

/*!
* \ingroup cltf128x64
* Destructor of the class "cltf128x64"\n
* Nothing special.\n
* @brief Destructor of the class "cltf128x64"
*/
    ~cltf128x64();

public slots:
/*!
* \ingroup cltf128x64
* @brief function SetOnLCD128x64()
* Initializes the LCD128x64 and register the callbacks
*
*/
    void SetOnLCD128x64();

/******************************************************************************/
private:

connect(ui->pBuLCD2SetOn, &QPushButton::clicked, &cl_lcd, &cltf128x64::SetOnLCD128x64);

Entferne da mal das & vor cl_lcd, weil das schon ein Pointer ist.

Stattdessen brauchst du ggf. ein & vor ui->pBuLCD2SetOn, falls pBuLCD2SetOn kein Pointer ist.