QT中 C++与 js 交互 (下)：使用QJSEngine

1.主要代码：

C++:

void QJSEngineDemo::initCenterControl()
{
    QJSValue jsMetaObject = m_pJSEngin->newQMetaObject(&centerControl::staticMetaObject);
    m_pJSEngin->globalObject().setProperty("CenterControl", jsMetaObject);
}
void QJSEngineDemo::exeJsFun(QString& fun)
{
    QJSValue jsObj = m_pJSEngin->globalObject().property("objGlobal");
    QJSValue result = jsObj.property(fun).call(QJSValueList()<<"11"<<"22");
    printException(result);
}

void QJSEngineDemo::printException(QJSValue& result)
{
    if (result.isError())
      qDebug()<< "Uncaught exception at line"
              << result.property("lineNumber").toInt()
              << ":" << result.toString();
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    preLoadScreen(NULL,a);

    QJSEngineDemo jsEngine;
    jsEngine.initCenterControl();
    jsEngine.loadJSFiles();
    QString fun = "loadTools";
    jsEngine.exeJsFun(fun);

    return a.exec();
}

JS:

objGlobal.controlObject = null;

/* use QJSEngine */
objGlobal.loadTools = function() {

    if (!this.initialized) {
        this.controlObject = new CenterControl();
        this.controlObject.testSignal.connect(testSlot);
        this.controlObject.createMainWindow();

        this.initialized = true;
    }
};

function testSlot(){
    if(this.controlObject !== null)
        this.controlObject.printMsg("called testSlot");
}

2.完整工程代码：

https://github.com/SanSuiWanTong/QT_ToolBox