c++ - 候选人期望 6 个参数，提供 0 个

Question

我正在创建一个由 6 列组成的 QTableView，它通过调用对话框插入特定值。当我编译项目时，我在文件“itemcameracalibrationdata.h”中收到以下错误:

注意:候选人需要 6 个参数，提供 0 个

注意:候选人需要 6 个参数，提供 1 个

为了完整起见，我在下面同时包含了 6 个变量和对话框文件: 在 itemcalibrationdata.h

下面

#ifndef ITEMCAMERACALIBRATIONDATA_H
#define ITEMCAMERACALIBRATIONDATA_H

#include <QObject>
#include <QString>

class itemCameraCalibrationData
{
public:
    itemCameraCalibrationData(const QString &cameraName, const double fovx, const double fovy,
                              int version, const double focalLenghth,
                              const double reprojectionerror);

    QString cameraName() const { return mCameraName;}
    int version() const { return mVersion; }
    double fovx() const { return mFovx; }
    double fovy() const { return mFovy; }
    double focalLenghth() const { return mFocalLenghth; }
    double reprojectionerror() const { return mReprojectionError; }

private:
    QString mCameraName;
    int mVersion;
    double mFovx;
    double mFovy;
    double mFocalLenghth;
    double mReprojectionError;

};

#endif // ITEMCAMERACALIBRATIONDATA_H

在itemcalibrationdata.cpp下

#include "itemcameracalibrationdata.h"

itemCameraCalibrationData::itemCameraCalibrationData(const QString &cameraName, const double fovx, const double fovy,
                                                     int version, const double focalLenghth,
                                                     const double reprojectionerror)
{
    mCameraName = cameraName;
    mFovx = fovx;
    mFovy = fovy;
    mVersion = version;
    mFocalLenghth = focalLenghth;
    mReprojectionError = reprojectionerror;
}

然后查看cameracaldialog.cpp，错误在该文件中的 ui(new Ui::cameraCalDialog)

行

#include "cameracaldialog.h"
#include "ui_cameracaldialog.h"
#include "itemcameracalibrationdata.h"

#include <QFile>
#include <QMessageBox>
#include <QFileDialog>
#include <QCompleter>
#include <QFileSystemModel>

cameraCalDialog::cameraCalDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::cameraCalDialog)
{

    ui->setupUi(this);
}

cameraCalDialog::~cameraCalDialog()
{
    delete ui;
}

void cameraCalDialog::on_buttonBox_accepted()
{
    mItemCamCal = itemCameraCalibrationData(ui->camName_lineEdit->text(),
                                            ui->ver_lineEdit->text().toInt(),
                                            ui->fovx_lineEdit->text().toDouble(),
                                            ui->fovy_lineEdit->text().toDouble(),
                                            ui->focal_lineEdit->text().toDouble(),
                                            ui->rep_lineEdit->text().toDouble());
    accept();
}

void cameraCalDialog::on_buttonBox_rejected()
{
    rejected();
}

作为最后一个文件 cameracaldialog.h

#ifndef CAMERACALDIALOG_H
#define CAMERACALDIALOG_H

#include <QDialog>
#include "itemcameracalibrationdata.h"


namespace Ui {
class cameraCalDialog;
}

class cameraCalDialog : public QDialog
{
    Q_OBJECT

public:
    explicit cameraCalDialog(QWidget *parent = nullptr);
    ~cameraCalDialog();
    itemCameraCalibrationData itemCamCal() const { return mItemCamCal; }


private slots:
    void on_buttonBox_accepted();
    void on_buttonBox_rejected();

private:
    Ui::cameraCalDialog *ui;
    itemCameraCalibrationData mItemCamCal;
};

#endif // CAMERACALDIALOG_H

非常感谢您就此事提供的任何见解

Answer 1

当您使用时:

itemCameraCalibrationData mItemCamCal; 

在 .h 中您正在创建一个新对象，但是类 itemCameraCalibrationData 需要参数，因此它会抛出错误。

在您的情况下，您不想在 .h 中创建它，而是在插槽 on_buttonBox_accepted 中创建它，因此解决方案是在 .h 中声明一个指针并使用 new 创建对象:

*.h

class cameraCalDialog : public QDialog
{
    ...

private:
    Ui::cameraCalDialog *ui;
    itemCameraCalibrationData *mItemCamCal;
};

*.cpp

cameraCalDialog::~cameraCalDialog()
{
    delete ui;
    delete mItemCamCal;
}


void cameraCalDialog::on_buttonBox_accepted()
{
    mItemCamCal = new itemCameraCalibrationData(ui->camName_lineEdit->text(),
                                            ui->ver_lineEdit->text().toInt(),
                                            ui->fovx_lineEdit->text().toDouble(),
                                            ui->fovy_lineEdit->text().toDouble(),
                                            ui->focal_lineEdit->text().toDouble(),
                                            ui->rep_lineEdit->text().toDouble());
    accept();
}