c++ - VS2013 with QT5.3.2 using Websocket and got a unresolved external symbol issue

I got a problem with VS2013 and QT5.3.2.
when I am using Websocket, it says unresolved external symbol with QWebSocket::sendTextMessage and other websocket functions.

I have already #include and set the QT Project Setting and checked WebKit and Network Module。

and this is the full error message I have got :

1>mainwindow.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QWebSocket::~QWebSocket(void)" (__imp_??1QWebSocket@@UAE@XZ)，referenced in function "public: virtual __thiscall MWebSocket::~MWebSocket(void)" (??1MWebSocket@@UAE@XZ)
1>MWebSocket.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QWebSocket::~QWebSocket(void)" (__imp_??1QWebSocket@@UAE@XZ)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QWebSocket::QWebSocket(class QString const &,enum QWebSocketProtocol::Version,class QObject *)" (__imp_??0QWebSocket@@QAE@ABVQString@@W4Version@QWebSocketProtocol@@PAVQObject@@@Z)，referenced in function "public: __thiscall MWebSocket::MWebSocket(class QUrl const &,class QObject *)" (??0MWebSocket@@QAE@ABVQUrl@@PAVQObject@@@Z)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __int64 __thiscall QWebSocket::sendTextMessage(class QString const &)" (__imp_?sendTextMessage@QWebSocket@@QAE_JABVQString@@@Z)，referenced in function "private: void __thiscall MWebSocket::onConnected(void)" (?onConnected@MWebSocket@@AAEXXZ)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebSocket::close(enum QWebSocketProtocol::CloseCode,class QString const &)" (__imp_?close@QWebSocket@@QAEXW4CloseCode@QWebSocketProtocol@@ABVQString@@@Z)，referenced in function "private: void __thiscall MWebSocket::onTextMessageReceived(class QString)" (?onTextMessageReceived@MWebSocket@@AAEXVQString@@@Z)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebSocket::open(class QUrl const &)" (__imp_?open@QWebSocket@@QAEXABVQUrl@@@Z)，referenced in function "public: __thiscall MWebSocket::MWebSocket(class QUrl const &,class QObject *)" (??0MWebSocket@@QAE@ABVQUrl@@PAVQObject@@@Z)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebSocket::connected(void)" (__imp_?connected@QWebSocket@@QAEXXZ)，referenced in function "public: __thiscall MWebSocket::MWebSocket(class QUrl const &,class QObject *)" (??0MWebSocket@@QAE@ABVQUrl@@PAVQObject@@@Z)
1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebSocket::disconnected(void)" (__imp_?disconnected@QWebSocket@@QAEXXZ)，referenced in function "public: __thiscall MWebSocket::MWebSocket(class QUrl const &,class QObject *)" (??0MWebSocket@@QAE@ABVQUrl@@PAVQObject@@@Z)

1>MWebSocket.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall QWebSocket::textMessageReceived(class QString const &)" (__imp_?textMessageReceived@QWebSocket@@QAEXABVQString@@@Z)，referenced in function "private: void __thiscall MWebSocket::onConnected(void)" (?onConnected@MWebSocket@@AAEXXZ)
1>MWebSocket.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static struct QMetaObject const QWebSocket::staticMetaObject" (__imp_?staticMetaObject@QWebSocket@@2UQMetaObject@@B)
1>debug/\MapleUI.exe : fatal error LNK1120: 9 unresolved externals

this is the code for Websocket:

//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]

anyone have idea about how to solve this problem? thanks