I got below error
"TypeError: cannot call sayHello(): argument 2 has unknown type `QString&'
(register the type with qScriptRegisterMetaType())"
when execute my Qt program test.exe to call a javascrip file haha.js. What I
was trying to do is to return a value ("result") from "void sayHello(const
QString &name, QString &result);" in javascript. Looks like QtScript
understands (const QString &) but can't understand (QString &). Any idea what I
did wrong?
haha.js
h = new Haha();
result = "";
h.sayHello("henry", result);
result;
the Qt program consists: haha.h, haha.cpp, main.cpp
haha.h
#ifndef HAHA_H
#define HAHA_H
#include <QObject>
class Haha : public QObject
{
Q_OBJECT
public:
explicit Haha(QObject *parent = 0);
public slots:
void sayHello(const QString &name, QString &result);
};
#endif // HAHA_H
haha.cpp
#include "haha.h"
Haha::Haha(QObject *parent) :
QObject(parent)
{
}
void Haha::sayHello(const QString &name, QString &result)
{
result = "Hello " + name;
}
main.cpp
#include <QtCore/QCoreApplication>
#include <QtDebug>
#include <QtScript>
#include "haha.h"
Q_SCRIPT_DECLARE_QMETAOBJECT(Haha, QObject*)
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QScriptEngine engine;
QScriptValue HahaClass = engine.scriptValueFromQMetaObject<Haha>();
engine.globalObject().setProperty("Haha", HahaClass);
QString fileName = "haha.js";
QFile scriptFile(fileName);
if (!scriptFile.open(QIODevice::ReadOnly)) {
return -1;
}
QTextStream b(&scriptFile);
QString contents = b.readAll();
scriptFile.close();
QScriptValue result = engine.evaluate(contents, fileName);
qDebug()<<result.toString();
return a.exec();
}
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