Qt4.8.6插件化编程例程--仅供参考

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工程结构：

工程源码：

-------------PluginAnimal.pro------------

TEMPLATE = subdirsSUBDIRS += \    dog \    animal

-------------animal.pro------------------

#-------------------------------------------------## Project created by QtCreator 2015-07-28T14:45:07##-------------------------------------------------QT       += coreQT       -= guiDESTDIR = ../../PluginAnimal/exeTARGET = animalCONFIG   += consoleCONFIG   -= app_bundleTEMPLATE = appSOURCES += main.cppHEADERS += \    animalinterface.h

-----------------animalinterface.h--------------------

#ifndef ANIMALINTERFACE_H#define ANIMALINTERFACE_H#include <QString>#include <QtPlugin>class AnimalInterface{public:    virtual QString type()=0;    virtual int age()=0;    virtual void voice()=0;};#define AnimalInterface_iid    "org.qt-proj.Qt.Animal"Q_DECLARE_INTERFACE(AnimalInterface, AnimalInterface_iid)#endif // ANIMALINTERFACE_H

--------------main.cpp---------------

#include <QCoreApplication>#include "animalinterface.h"#include <QDebug>#include <QPluginLoader>int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    qDebug()<<"animal ...";    QPluginLoader loader(QCoreApplication::applicationDirPath().append("/dog.dll"));    QObject *obj=qobject_cast<QObject *>(loader.instance());    if(obj){        qDebug()<<"load success!";        AnimalInterface *animal=qobject_cast<AnimalInterface *>(obj);        if(animal){            qDebug()<<"type:"<<animal->type()<<", age:"<<animal->age();            animal->voice();        }else{            qDebug()<<"animal error!";        }    }else{        qDebug()<<"object error!";    }    return 0;}

------------dog.pro-----------

#-------------------------------------------------## Project created by QtCreator 2015-07-28T14:47:04##-------------------------------------------------QT       -= guiTARGET = dogTEMPLATE = libDESTDIR = ../../PluginAnimal/exeSOURCES += dog.cppHEADERS += dog.hunix {    target.path = /usr/lib    INSTALLS += target}

--------------dog.h---------------

#ifndef DOG_H#define DOG_H#include "../animal/animalinterface.h"class Dog : public QObject, AnimalInterface{    Q_OBJECT    Q_INTERFACES(AnimalInterface)public:    QString type();    int age();    void voice();};#endif // DOG_H

---------------dog.cpp--------------

#include "dog.h"#include <QDebug>QString Dog::type(){    return "dog";}int Dog::age(){    return 9;}void Dog::voice(){    qDebug()<<"dog bark!";}Q_EXPORT_PLUGIN2(AnimalInterface_iid, Dog)

运行效果：

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