QT 编译动态DLL及使用

#ifndef UNTITLED8_GLOBAL_H

#define UNTITLED8_GLOBAL_H

#include <QtCore/qglobal.h>

#if defined(UNTITLED8_LIBRARY)

#  define UNTITLED8SHARED_EXPORT Q_DECL_EXPORT

#else

#  define UNTITLED8SHARED_EXPORT Q_DECL_IMPORT

#endif

#endif // UNTITLED8_GLOBAL_H

#ifndef UNTITLED8_H

#define UNTITLED8_H

#include "untitled8_global.h"

class UNTITLED8SHARED_EXPORT Untitled8

{

public:

Untitled8();

int add(const int a, const int b);

};

extern "C"{

UNTITLED8SHARED_EXPORTUntitled8 * GetObj();

}

#endif // UNTITLED8_H

#include "untitled8.h"

Untitled8::Untitled8()

{

}

int Untitled8::add(const int a, const int b)

{

return a+b;

}

Untitled8 * GetObj()

{

return new Untitled8();

}

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <qlibrary.h>

typedef Untitled8 *(*GetDll)();

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

QLibrary lib("untitled8.dll");

if(lib.load())

{

GetDll dll = (GetDll)lib.resolve("GetObj");

ti = dll();

int x = ti->add(5,3);

ui->pushButton->setText("xxx");

}

}

MainWindow::~MainWindow()

{

delete ui;

}

#-------------------------------------------------

#

# Project created by QtCreator 2016-06-30T12:50:30

#

#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = untitledtest

TEMPLATE = app

SOURCES += main.cpp\

mainwindow.cpp

HEADERS  += mainwindow.h \

untitled8.h \

untitled8_global.h

FORMS    += mainwindow.ui

LIBS += "C:\Users\Administrator\Documents\untitledtest\untitled8.dll"