Qt和动态库示例代码

// 动态库头文件
// mylib.h
#ifndef MYLIB_H
#define MYLIB_H

#include <QString>

class MyLib
{
public:
    static QString getVersion();
};

#endif // MYLIB_H

// 动态库源文件
// mylib.cpp
#include "mylib.h"

QString MyLib::getVersion()
{
    return "1.0.0";
}

// 动态库的pro文件
// mylib.pro
QT -= gui

TARGET = mylib
TEMPLATE = lib

DEFINES += MYLIB_LIBRARY

SOURCES += mylib.cpp

HEADERS += mylib.h

// 主程序源文件
// main.cpp
#include <QCoreApplication>
#include <QDebug>
#include "mylib.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    qDebug() << "MyLib version:" << MyLib::getVersion();

    return a.exec();
}

// 主程序的pro文件
// main.pro
QT -= gui

TARGET = main
TEMPLATE = app

CONFIG += c++11

SOURCES += main.cpp

win32 {
    LIBS += -L$$PWD/../mylib/ -lmylib
    INCLUDEPATH += $$PWD/../mylib
    DEPENDPATH += $$PWD/../mylib
}

macx {
    LIBS += -L$$PWD/../mylib/ -lmylib
    INCLUDEPATH += $$PWD/../mylib
    DEPENDPATH += $$PWD/../mylib
}

linux {
    LIBS += -L$$PWD/../mylib/ -lmylib
    INCLUDEPATH += $$PWD/../mylib
    DEPENDPATH += $$PWD/../mylib
}