QtScript模块

在Qt中，可以使用Qt Script模块来将C++类和方法绑定到Qt脚本引擎中，从而使得可以在Qt脚本中调用这些C++类和方法。以下是一个简单的示例，演示了如何在Qt中将C++类暴露给Qt Script引擎：

假设有一个名为 MyClass 的C++类，其头文件 MyClass.h 如下所示：

#ifndef MYCLASS_H
#define MYCLASS_H

#include <QObject>

class MyClass : public QObject
{
    Q_OBJECT

public:
    MyClass(QObject *parent = nullptr);
    Q_INVOKABLE void doSomething();
};

#endif // MYCLASS_H

接着，在 MyClass.cpp 文件中实现 MyClass 类的方法：

#include "MyClass.h"
#include <QDebug>

MyClass::MyClass(QObject *parent) : QObject(parent)
{
}

void MyClass::doSomething()
{
    qDebug() << "Doing something in C++";
}

现在，我们将 MyClass 类暴露给Qt Script引擎。创建一个 ScriptManager 类，用来管理Qt Script引擎，将 MyClass 类注册到引擎中：

#include <QScriptEngine>
#include <QScriptValue>
#include "MyClass.h"

class ScriptManager
{
public:
    ScriptManager()
    {
        engine.globalObject().setProperty("MyClass", engine.newQObject(new MyClass()));
    }

    void evaluateScript(const QString &script)
    {
        engine.evaluate(script);
    }

private:
    QScriptEngine engine;
};

在主程序中，创建 ScriptManager 实例并执行脚本：

#include <QCoreApplication>
#include "ScriptManager.h"

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

    ScriptManager scriptManager;
    scriptManager.evaluateScript("MyClass.doSomething();");

    return app.exec();
}

通过这样的方式，可以在Qt脚本中调用C++类的方法，并实现C++和Qt脚本之间的交互。

注意工程文件创建中需要添加QT += script：

QT -= gui
QT += script

CONFIG += c++11 console
CONFIG -= app_bundle

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        main.cpp \
        myclass.cpp

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

HEADERS += \
    ScriptManager.h \
    myclass.h