Q_INVOKABLE宏的简单用法

q_invokable.h

#include <QObject>
#include <QDebug>

class MyClass : public QObject
{
    Q_OBJECT
public:
    explicit MyClass(QObject *parent = nullptr):QObject(parent){}

    Q_INVOKABLE void printHello(const QString& text)
    {
            qDebug()<<"MyClass:"<<text;
    }
};


// ======== main.cpp ===========
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    auto myClass=new MyClass(&a);
    QString str("main:");
    QMetaObject::invokeMethod(myClass, "printHello", Qt::QueuedConnection, Q_ARG(QString,str));

    return a.exec();
}