// Namespace
namespace ARB {

// Class definitions
class EnumClass : public QObject {

	Q_OBJECT

	public:

		enum class Status: int {

			Error = 0,
			Ok = 1,
			Existed = 2,
			NotExisted = 3
		};
		Q_ENUM(Status)
};

} // namespace ARB

Q_DECLARE_METATYPE(ARB::EnumClass::Status)

In *.cpp registering class:

qRegisterMetaType<ARB::EnumClass::Status>("Status");
qmlRegisterType<ARB::EnumClass::Status>("Enums", 1, 0, "Status");

In QML file:

import Enums 1.0

What is missing by me? For now there are error in passing enum from QML to C++:

("Status", QVariant(Invalid))

It's even marked in Qt Creator editor in QML (bold font). But not working in reality.