当我在脚本中添加插槽时,它将不再构建。
inkpuppet.obj:-1: error: LNK2005: "private: void __cdecl InkPuppet::on_aboutButton_clicked(void)" (?on_aboutButton_clicked@InkPuppet@@AEAAXXZ) already defined in main.obj
和
debugInkPuppet.exe:-1: error: LNK1169: one or more multiply defined symbols found
这是代码:
h-注释掉void on_aboutButton_clicked();
,最后的函数将使其运行。
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QtCore>
namespace Ui {
class InkPuppet;
}
class InkPuppet : public QWidget
{
Q_OBJECT
public:
explicit InkPuppet(QWidget *parent = 0);
~InkPuppet();
private:
Ui::InkPuppet *ui;
private slots:
void on_aboutButton_clicked();
};
#endif // WIDGET_H
void InkPuppet::on_aboutButton_clicked()
{
}
inkpupt.cpp
#include "inkpuppet.h"
#include "ui_inkpuppet.h"
InkPuppet::InkPuppet(QWidget *parent) :
QWidget(parent),
ui(new Ui::InkPuppet)
{
ui->setupUi(this);
//connect(ui->lowerFrameBox, SIGNAL(valueChanged(int)), ui->timeSlider, SLOT(setRange(int,int)));
}
InkPuppet::~InkPuppet()
{
delete ui;
}
main.cpp
#include "inkpuppet.h"
#include "aboutdialog.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
InkPuppet w;
w.show();
return a.exec();
}
aboutdialog.h
#ifndef ABOUTDIALOG_H
#define ABOUTDIALOG_H
#include <QDialog>
namespace Ui {
class AboutDialog;
}
class AboutDialog : public QDialog
{
Q_OBJECT
public:
explicit AboutDialog(QWidget *parent = 0);
~AboutDialog();
private:
Ui::AboutDialog *ui;
};
#endif // ABOUTDIALOG_H
关于拨号.cpp
#include "aboutdialog.h"
#include "ui_aboutdialog.h"
AboutDialog::AboutDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::AboutDialog)
{
ui->setupUi(this);
}
AboutDialog::~AboutDialog()
{
delete ui;
}
您在inkpuppet.h中定义void InkPuppet::on_aboutButton_clicked()
,然后将其包含在inkpuppt.cpp中,并在main.cpp->中找到一个或多个多重定义符号。
放入
void InkPuppet::on_aboutButton_clicked()
{
}
在您的inkpupt.cpp文件中。
如果粘贴的第一个文件是一个整体,则include保护程序有问题。定义为在防护端之后。
#endif // WIDGET_H
void InkPuppet::on_aboutButton_clicked()
{
}
您的定义正好在#endif
之后,这意味着只要在同一翻译单元中,标头被包含两次,就会出现此错误。这种情况发生在您的代码中,因为inkpuppet.h
包含在main.cpp
和inkpuppet.cpp
中。您应该将on_aboutButton_clicked()
的实现代码放在inkpuppet.cpp
文件中。