Qt动态加载dll

VS2010~Qt封装带界面的纯虚类动态库

上一篇博客记录了纯虚函数动态库的封装，这篇博客记录一下Qt中加载动态库的方法，具体代码如下：

common.h和ibaseclass.h跟上一篇博客一样，这里就不写了，拷贝到工程目录下，然后将他们添加–》现有项，添加进来就可以了

test.ui只是一个继承QMainWindow的子类

test.h

#ifndef TEST_H
#define TEST_H

#include <QMainWindow>
#include <QWidget>
#include "ui_test.h"
#include "ibaseclass.h"
#include <QLibrary>

typedef void *(*createWidget)(QWidget *); //声明createInfoWidget函数指针
typedef IBaseClass *(*getWidget)(void *); //声明getInfoWidget函数指针
typedef void (*destroyWidget)(void *); //声明destroyInfoWidget函数指针

class Test : public QMainWindow
{
	Q_OBJECT

public:
	Test(QWidget *parent = 0);
	~Test();

private:
	Ui::Test ui;

	createWidget m_FunCreateInfoWidget; //定义createInfoWidget函数指针
	getWidget m_FunGetInfoWidget; //定义getInfoWidget函数指针
	destroyWidget m_FunDestroyInfoWidget; //定义destroyInfoWidget函数指针
	void *m_pVoidInfo; //接收createInfoWidget的返回值
	IBaseClass *m_pIBaseClass; //接收getInfoWidget的返回值
	QLibrary *m_pLibrary;
};

#endif // TEST_H

test.cpp

#include "test.h"
#include "common.h"

Test::Test(QWidget *parent)
	: QMainWindow(parent)
	, m_pLibrary(NULL)
{
	ui.setupUi(this);

	bool bflag = false;
	m_pLibrary = new QLibrary("MyDll.dll");
	if (!m_pLibrary->isLoaded())
	{
		bflag = m_pLibrary->load();
		if (bflag)
		{
			m_FunCreateInfoWidget = (createWidget)m_pLibrary->resolve("createInfoWidget"); //通过函数名createInfoWidget来查找函数
			m_FunGetInfoWidget = (getWidget)m_pLibrary->resolve("getInfoWidget");
			m_FunDestroyInfoWidget = (destroyWidget)m_pLibrary->resolve("destroyInfoWidget");
		}
	}

	if (m_FunCreateInfoWidget)
	{
		m_pVoidInfo = m_FunCreateInfoWidget(this);
		m_pIBaseClass = m_FunGetInfoWidget(m_pVoidInfo);
		if (m_pIBaseClass)
		{
			QList<Student> qlist;
			Student s;
			s.strClass = "grade 6";
			s.strName = "zhangsan";
			s.strSex = "man";
			s.strNo = "37";
			qlist.push_back(s);
			m_pIBaseClass->LoadStudentInfo(qlist); //调用虚基类接口，显示学生信息
		}
	}
}

Test::~Test()
{

}

运行结果：

源码：
https://github.com/BlairHao/MyTest