QPluginLoader not load plugin

[Thyago.celler]

Hello,

I have a problem, when I use QPluginLoader,the return is empty. But the path it is correct.

This is my code:

QDir dir( QCoreApplication::applicationDirPath());
        dir.cdUp();
        dir.cd("portal");
 
        qDebug() << dir.absoluteFilePath(fileName);
        QPluginLoader loader(" dir.absoluteFilePath(fileName)");
 
        qDebug() << loader.isLoaded();
        qDebug() << loader.errorString();
        QObject *plugin = loader.instance();

QDir dir( QCoreApplication::applicationDirPath());
        dir.cdUp();
        dir.cd("portal");

        qDebug() << dir.absoluteFilePath(fileName);
        QPluginLoader loader(" dir.absoluteFilePath(fileName)");

        qDebug() << loader.isLoaded();
        qDebug() << loader.errorString();
        QObject *plugin = loader.instance();

To copy to clipboard, switch view to plain text mode 

The result in line :

1. qDebug() << dir.absoluteFilePath(fileName); is "path this is right", including the name file.

2. qDebug() << loader.isLoaded(); is "false"

3. qDebug() << loader.errorString(); is "unknow error".

and line:

Please, help me. =)

Thanks.