c++ - C++/Qt-从MainWindow打开对话框-错误LNK2019-LNK2001:无法解析的外部符号

基本上，代码的目标是在单击botton之后打开一个包含QWebView(具有某些内容)的对话框。

这些是我所做的:

mainwindow.h:

class MainWindow : public QMainWindow, public Ui::MainWindowUi
{
    ...
    private slots:
    void on_ViewDatabase_clicked();
    ...
}

mainwindow.cpp:

#include "mainwindow.h"
#include "onlinedb.h"



void MainWindow::on_ViewDatabase_clicked()
{

    OnlineDB dlg(this);
    dlg.exec();
}

onlinedb.h:

#ifndef OnlineDB_H
#define OnlineDB_H


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


class MainWindow;

class OnlineDB : public QDialog, public Ui::OnlineDB
{
    Q_OBJECT

public:
    OnlineDB(LkMainWindow *parent);
    ~OnlineDB();

private:
    MainWindow  *MainWindow;

};


#endif

onlinedb.cpp:

#include "onlinedb.h"
#include "mainwindow.h"

///////////////////////////////////////////////////////////////////////////////
//
// OnlineDB class constructor
//
// Create a OnlineDB
//
OnlineDB::OnlineDB(MainWindow *parent) : QDialog(parent), MainWindow(parent)
{
    setupUi(this);
    QUrl url("http://google.com"); //whatever
    webView->load(url);
}



///////////////////////////////////////////////////////////////////////////////
//
// OnlineDB class destructor
//
// Clean up the OnlineDB
//
OnlineDB::~OnlineDB()
{

}

我有几个链接错误

请问有人可以帮忙吗？

3>Linking...
3>onlinedb.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebView::load(class QUrl const &)" (__imp_?load@QWebView@@QAEXABVQUrl@@@Z) referenced in function "public: __thiscall OnlineDB::OnlineDB(class LkMainWindow *)" (??0OnlineDB@@QAE@PAVLkMainWindow@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall OnlineDB::metaObject(void)const " (?metaObject@OnlineDB@@UBEPBUQMetaObject@@XZ)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual void * __thiscall OnlineDB::qt_metacast(char const *)" (?qt_metacast@OnlineDB@@UAEPAXPBD@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall OnlineDB::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@OnlineDB@@UAEHW4Call@QMetaObject@@HPAPAX@Z)
3>onlinedb.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebView::setUrl(class QUrl const &)" (__imp_?setUrl@QWebView@@QAEXABVQUrl@@@Z) referenced in function "public: void __thiscall Ui_OnlineDB::setupUi(class QDialog *)" (?setupUi@Ui_OnlineDB@@QAEXPAVQDialog@@@Z)
3>onlinedb.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QWebView::QWebView(class QWidget *)" (__imp_??0QWebView@@QAE@PAVQWidget@@@Z) referenced in function "public: void __thiscall Ui_OnlineDB::setupUi(class QDialog *)" (?setupUi@Ui_OnlineDB@@QAEXPAVQDialog@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall QWebView::metaObject(void)const " (?metaObject@QWebView@@UBEPBUQMetaObject@@XZ)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual void * __thiscall QWebView::qt_metacast(char const *)" (?qt_metacast@QWebView@@UAEPAXPBD@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall QWebView::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@QWebView@@UAEHW4Call@QMetaObject@@HPAPAX@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QWebView::event(class QEvent *)" (?event@QWebView@@UAE_NPAVQEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual class QSize __thiscall QWebView::sizeHint(void)const " (?sizeHint@QWebView@@UBE?AVQSize@@XZ)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::mousePressEvent(class QMouseEvent *)" (?mousePressEvent@QWebView@@MAEXPAVQMouseEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::mouseReleaseEvent(class QMouseEvent *)" (?mouseReleaseEvent@QWebView@@MAEXPAVQMouseEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::mouseDoubleClickEvent(class QMouseEvent *)" (?mouseDoubleClickEvent@QWebView@@MAEXPAVQMouseEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::mouseMoveEvent(class QMouseEvent *)" (?mouseMoveEvent@QWebView@@MAEXPAVQMouseEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::wheelEvent(class QWheelEvent *)" (?wheelEvent@QWebView@@MAEXPAVQWheelEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::keyPressEvent(class QKeyEvent *)" (?keyPressEvent@QWebView@@MAEXPAVQKeyEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::keyReleaseEvent(class QKeyEvent *)" (?keyReleaseEvent@QWebView@@MAEXPAVQKeyEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::focusInEvent(class QFocusEvent *)" (?focusInEvent@QWebView@@MAEXPAVQFocusEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::focusOutEvent(class QFocusEvent *)" (?focusOutEvent@QWebView@@MAEXPAVQFocusEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::paintEvent(class QPaintEvent *)" (?paintEvent@QWebView@@MAEXPAVQPaintEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::resizeEvent(class QResizeEvent *)" (?resizeEvent@QWebView@@MAEXPAVQResizeEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::contextMenuEvent(class QContextMenuEvent *)" (?contextMenuEvent@QWebView@@MAEXPAVQContextMenuEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::dragEnterEvent(class QDragEnterEvent *)" (?dragEnterEvent@QWebView@@MAEXPAVQDragEnterEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::dragMoveEvent(class QDragMoveEvent *)" (?dragMoveEvent@QWebView@@MAEXPAVQDragMoveEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::dragLeaveEvent(class QDragLeaveEvent *)" (?dragLeaveEvent@QWebView@@MAEXPAVQDragLeaveEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::dropEvent(class QDropEvent *)" (?dropEvent@QWebView@@MAEXPAVQDropEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::changeEvent(class QEvent *)" (?changeEvent@QWebView@@MAEXPAVQEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall QWebView::inputMethodEvent(class QInputMethodEvent *)" (?inputMethodEvent@QWebView@@MAEXPAVQInputMethodEvent@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "public: virtual class QVariant __thiscall QWebView::inputMethodQuery(enum Qt::InputMethodQuery)const " (?inputMethodQuery@QWebView@@UBE?AVQVariant@@W4InputMethodQuery@Qt@@@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual bool __thiscall QWebView::focusNextPrevChild(bool)" (?focusNextPrevChild@QWebView@@MAE_N_N@Z)
3>onlinedb.obj : error LNK2001: unresolved external symbol "protected: virtual class QWebView * __thiscall QWebView::createWindow(enum QWebPage::WebWindowType)" (?createWindow@QWebView@@MAEPAV1@W4WebWindowType@QWebPage@@@Z)
3>onlinedb.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QWebView::~QWebView(void)" (__imp_??1QWebView@@UAE@XZ) referenced in function "public: virtual void * __thiscall QWebView::`scalar deleting destructor'(unsigned int)" (??_GQWebView@@UAEPAXI@Z)

最佳答案

unresolved external symbol "public: virtual int __thiscall OnlineDB::qt_metacall(enum QMetaObject::Call,int,void * *)

您尚未移动OnlineDB或尚未链接目标文件。

error LNK2019: unresolved external symbol "__declspec(dllimport) public: void _thiscall QWebView::load(class QUrl const &)"

您尚未链接所有必需的Qt库。 QWebView在QtWebKit库中。