c++ - 使用Websocket的QT5.3.2的VS2013并出现 Unresolved external symbol 问题

我遇到了VS2013和QT5.3.2的问题。
当我使用Websocket时，它使用QWebSocket::sendTextMessage和其他websocket函数显示未解析的外部符号。

我已经#include <QtWebSockets/QWebSocket>并设置了QT项目设置，并检查了WebKit和网络模块。

这是我得到的完整错误消息:

1> mainwindow.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)public:虚拟__thiscall QWebSocket::〜QWebSocket(void)”(__ imp _ ?? 1QWebSocket @@ UAE @ XZ)，在函数“public:virtual __thiscall中引用” MWebSocket::〜MWebSocket(void)“(?? 1MWebSocket @@ UAE @ XZ)
1> MWebSocket.obj:错误LNK2001:未解析的外部符号“__declspec(dllimport)公共(public):虚拟__thiscall QWebSocket::〜QWebSocket(void)”(__ imp _ ?? 1QWebSocket @@ UAE @ XZ)
1> MWebSocket.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)公共(public):__thiscall QWebSocket::QWebSocket(class QString const＆，enum QWebSocketProtocol::Version，class QObject *)”(__imp _ ?? 0QWebSocket @@ QAE @ ABVQString @@ W4Version @ QWebSocketProtocol @@ PAVQObject @@@ Z)，在函数“public:__thiscall MWebSocket::MWebSocket(class QUrl const＆，class QObject *)”中引用(?? 0MWebSocket @@ QAE @ ABVQUrl @@ PAVQObject @ @@ Z)
1> MWebSocket.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)公共(public):__int64 __thiscall QWebSocket::sendTextMessage(class QString const＆)”(__imp_？sendTextMessage @ QWebSocket @@ QAE_JABVQString @@@ Z)，在函数中引用“私有(private):无效__thiscall MWebSocket::onConnected(void)”(？onConnected @ MWebSocket @@ AAEXXZ)
1> MWebSocket.obj:错误LNK2019:未解决的外部符号“__declspec(dllimport)公共(public):void __thiscall QWebSocket::close(枚举QWebSocketProtocol::CloseCode，类QString const＆)”(__imp_？close @ QWebSocket @@ QAEXW4CloseCode @ QWebSocketProtocol @ @ABVQString @@@@ Z)，在函数“私有(private):void __thiscall MWebSocket::onTextMessageReceived(class QString)”中引用(？onTextMessageReceived @ MWebSocket @@ AAEXVQString @@@ Z)
1> MWebSocket.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)public:void __thiscall QWebSocket::open(class QUrl const＆)”(__imp_？open @ QWebSocket @@ QAEXABVQUrl @@@@ Z，在函数中引用“public:__thiscall MWebSocket::MWebSocket(class QUrl const＆，class QObject *)”(?? 0MWebSocket @@ QAE @ ABVQUrl @@ PAVQObject @@@@ Z)
1> MWebSocket.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)public:void __thiscall QWebSocket::connected(void)”(__ imp_？connected @ QWebSocket @@ QAEXXZ)，在函数“public:__thiscall MWebSocket::”中引用MWebSocket(class QUrl const＆，class QObject *)“(?? 0MWebSocket @@ QAE @ ABVQUrl @@ PAVQObject @@@ Z)
1> MWebSocket.obj:错误LNK2019:未解决的外部符号“__declspec(dllimport)public:void __thiscall QWebSocket::disconnected(void)”(__ imp_？disconnected @ QWebSocket @@ QAEXXZ)，在函数“public:__thiscall MWebSocket::中引用” MWebSocket(class QUrl const＆，class QObject *)“(?? 0MWebSocket @@ QAE @ ABVQUrl @@ PAVQObject @@@ Z)
1> MWebSocket.obj:错误LNK2019:未解析的外部符号“__declspec(dllimport)公共(public):void __thiscall QWebSocket::textMessageReceived(class QString const＆)”(__imp_？textMessageReceived @ QWebSocket @@ QAEXABVQString @@@@ Z)，在函数中引用“私有(private):无效__thiscall MWebSocket::onConnected(void)”(？onConnected @ MWebSocket @@ AAEXXZ)
1> MWebSocket.obj:错误LNK2001:未解析的外部符号“__declspec(dllimport)公共(public):静态结构QMetaObject const QWebSocket::staticMetaObject”(__ imp_？staticMetaObject @ QWebSocket @@ 2UQMetaObject @@ B)
1> debug / \ MapleUI.exe:致命错误LNK1120:9个未解决的外部组件

这是Websocket的代码:

//HEADER
#pragma once
#include "global.h"


class MWebSocket : public QObject
{
    Q_OBJECT
public:
    explicit MWebSocket(const QUrl &url, QObject *parent = Q_NULLPTR);

Q_SIGNALS:
    void closed();

    private Q_SLOTS:
    void onConnected();
    void onTextMessageReceived(QString message);

private:
    QWebSocket m_webSocket;
    QUrl m_url;
};



//CPP

#include "global.h"
#include "MWebSocket.h"

QT_USE_NAMESPACE

//! [constructor]
MWebSocket::MWebSocket(const QUrl &url, QObject *parent) :
QObject(parent),
m_url(url)
{
    connect(&m_webSocket, &QWebSocket::connected, this, &MWebSocket::onConnected);
    connect(&m_webSocket, &QWebSocket::disconnected, this, &MWebSocket::closed);
    m_webSocket.open(QUrl(url));
}
//! [constructor]

//! [onConnected]
void MWebSocket::onConnected()
{
    qDebug() << "WebSocket connected";
    connect(&m_webSocket, &QWebSocket::textMessageReceived,
        this, &MWebSocket::onTextMessageReceived);
    m_webSocket.sendTextMessage(QStringLiteral("H2ello, world!"));
}
//! [onConnected]

//! [onTextMessageReceived]
void MWebSocket::onTextMessageReceived(QString message)
{
    qDebug() << "Message received:" << message;
    m_webSocket.close();
}
//! [onTextMessageReceived]

有谁知道如何解决这个问题？谢谢

最佳答案

只需发现将Qt5WebSocketsd.lib添加到项目即可解决此问题。我不知道为什么这需要手动操作，因为在我使用其他库QT5插件之前，它们会自动添加

关于c++ - 使用Websocket的QT5.3.2的VS2013并出现 Unresolved external symbol 问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28525250/