error C2248: 'QObject::QObject' : cannot access private member declared in class 'QObject'

1.error C2471: cannot update program database vc90.pdb

解决方案：https://blog.csdn.net/shuixin536/article/details/8620684

2.提示不能访问QObject的私有成员的解决办法：

class PhotosData:public DataInterface
{
Q_OBJECT
public:
PhotosData(){};
~PhotosData(){};

QPixmap PixMap() { return m_PixMap;};
void SetPixMap(QPixmap pixmap) { m_PixMap = pixmap; };
private:
QPixmap m_PixMap;
QString m_Name;
QString m_Time;
QString m_Date;
};

PhotosData *node = new PhotosData(*mediaItem);  //引用了PhotosData基类的默认构造函数
group->Add(node);

继承的类要定义使用的构造函数的类型，否则会默认调用基类的构造函数，如果基类的构造函数是私有的。那就会引起报错