How do I instantiate many object instance with QPluginLoader?

FloatFlower.Huang

In Qt documentation(http://doc.qt.io/qt-5/qpluginloader.html):

Returns the root component object of the plugin. The plugin is loaded if necessary. The function returns 0 if the plugin could not be loaded or if the root component object could not be instantiated.
If the root component object was destroyed, calling this function creates a new instance.

Is it means that each QPluginLoader can only instantiate one object? How do I create lots of instance from QPluginLoader?

In source code, implementation of instance() :

QObject *QPluginLoader::instance()
{
    if (!isLoaded() && !load())
        return 0;
    if (!d->inst && d->instance)
        d->inst = d->instance();
    return d->inst.data();
}

d is a pointer point to QLibraryPrivate, which keep a QPointer<QObject> inst; point to the object that create from instance(), so I think the object create from QPluginLoader is always singleton, how can I create many different objects from it?

The only solution I figure out:

class Foo : public QObject
{
    Object* creator() {
        return new Foo();
    }
}

and I can do this:

QPluginLoader loader("PATH/TO/LOADER");
QObject* object = loader.instance();
Foo* foo = qobject_cast<Foo*>(object);
Foo *foo1 = foo->creator();

I don't know whether the solution is a good solution or not.

jsulm

@FloatFlower.Huang Your root object (Foo in the example) should create the instances you need.
See here http://doc.qt.io/qt-5/plugins-howto.html

class MyStylePlugin : public QStylePlugin
{
    Q_OBJECT
    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QStyleFactoryInterface" FILE "mystyleplugin.json")
public:
    QStyle *create(const QString &key);
};

FloatFlower.Huang

@jsulm Thanks a lot!
Sorry, I didn't read the documentation carefully.