QMqttMessageStatusProperties Class

The QMqttMessageStatusProperties class represents additional information provided by the server during message delivery. 更多...

头：	#include <QMqttMessageStatusProperties>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Mqtt) target_link_libraries(mytarget PRIVATE Qt6::Mqtt)
qmake:	QT += mqtt

所有成员列表，包括继承成员

公共函数

QString	reason () const
QMqtt::ReasonCode	reasonCode () const
QMqttUserProperties	userProperties () const

详细描述

Depending on the QoS level of a message being sent by QMqttClient::publish (), a server reports the state of delivery. Additionally to the QMqtt::MessageStatus , complementary information might be included by the server. These are exposed to users via QMqttMessageStatusProperties.

注意： Message status properties are part of the MQTT 5.0 specification and cannot be used when connecting with a lower protocol level. See QMqttClient::ProtocolVersion 了解更多信息。

成员函数文档编制

QString QMqttMessageStatusProperties:: reason () const

Returns the reason string of a failed message delivery.

QMqtt::ReasonCode QMqttMessageStatusProperties:: reasonCode () const

Returns the reason code of a failed message delivery.

QMqttUserProperties QMqttMessageStatusProperties:: userProperties () const

Returns properties specified in conjunction with a message.