我是C++和Qt的新手。我的问题是，我创建了一个新类，但它没有被编译。所以编译器说:“...中未解析的对象”。这是标题:#ifndefTRANSITIOUSPLAYER_H#defineTRANSITIOUSPLAYER_H#includeclassTransitiousPlayer{public:TransitiousPlayer();TransitiousPlayer(constTransitiousPlayer&other);~TransitiousPlayer();voidplay();};Q_DECLARE_METATYPE(TransitiousPlayer)#endif/