本文主要是介绍some notice about slot funtions，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
when you want to use slot functions technique, you need to define classes like follows:
#include <QObject>
class Scene : public QObject
{Q_OBJECT</qobject>In order to let qt know those changes, it is very necessary to qmake the project again.
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