QRemoteObjectAbstractPersistedStore 类

提供用于将复制 PROP 值设为最后一次使用复制时的值的方法的类。更多...

头：	#include <QRemoteObjectAbstractPersistedStore>
qmake:	QT += remoteobjects
继承：	QObject

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公共函数

	QRemoteObjectAbstractPersistedStore (QObject * parent = nullptr)
virtual QVariantList	restoreProperties (const QString & repName , const QByteArray & repSig ) = 0
virtual void	saveProperties (const QString & repName , const QByteArray & repSig , const QVariantList & 值 ) = 0

详细描述

This can be used to provide a "reasonable" value to be displayed until the connection to the source is established and current values are available.

This class must be overridden to provide an implementation for saving ( QRemoteObjectAbstractPersistedStore::saveProperties ) and restoring ( QRemoteObjectAbstractPersistedStore::restoreProperties ) PROP values. The derived type can then be set for a node, and any replica acquired from that node will then automatically store PERSISTED properties when the replica destructor is called, and retrieve the values when the replica is instantiated.

成员函数文档编制

QRemoteObjectAbstractPersistedStore:: QRemoteObjectAbstractPersistedStore ( QObject * parent = nullptr)

构造 QRemoteObjectAbstractPersistedStore 采用给定 parent 。默认值对于 parent is nullptr .

`[pure virtual]` QVariantList QRemoteObjectAbstractPersistedStore:: restoreProperties (const QString & repName , const QByteArray & repSig )

This method will be provided the replica class's repName and repSig when the replica is being initialized. It is the responsibility of the inheriting class to get the last values persisted by QRemoteObjectAbstractPersistedStore::saveProperties and return them. An empty QVariantList should be returned if no values are available.

另请参阅 QRemoteObjectAbstractPersistedStore::saveProperties .

`[pure virtual]` void QRemoteObjectAbstractPersistedStore:: saveProperties (const QString & repName , const QByteArray & repSig , const QVariantList & 值 )

This method will be provided the replica class's repName , repSig and the list of 值 that PERSISTED properties have when the replica destructor was called. It is the responsibility of the inheriting class to store the information in a manner consistent for QRemoteObjectAbstractPersistedStore::restoreProperties to retrieve.

另请参阅 QRemoteObjectAbstractPersistedStore::restoreProperties .