Question

我正在创建一个由6列组成的QTableView，它通过调用对话框来插入特定值。当我编译项目时，我在文件＆＃39; itemcameracalibrationdata.h＆＃39;中收到以下错误：

注意：候选人需要6个参数，0提供

注意：候选人需要6个参数，1个提供

为了完整性，我在6个变量和对话框文件中包括：在 itemcalibrationdata.h

下方

#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

itemcalibrationdata.cpp

下方

#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;
}

然后看 cameracaldialog.cpp ，错误在此文件的 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

使用时：

itemCameraCalibrationData mItemCamCal;

在.h中你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，您不希望在.h中创建它，但在插槽on_buttonBox_accepted中创建它，因此解决方案是在.h中声明指针并使用new创建对象：

<强> *的.h

class cameraCalDialog : public QDialog
{
    ...

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

<强> *。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();
}

Answer 2

您需要一个默认构造函数。
使用const值参数对接口进行污染是没有意义的。 const属于实现，是的，签名可以有不同的方式。该语言是按照目的设计的。
使用初始化列表。

// itemcameracalibrationdata.cpp
#pragma once
#include <QString>

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

// itemcameracalibrationdata.cpp
#include "itemcameracalibrationdata.h"

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

候选人需要6个参数，0提供

2 个答案: