QObjectCleanupHandler Class

The QObjectCleanupHandler class watches the lifetime of multiple QObjects. 更多...

头文件:	#include <QObjectCleanupHandler>
qmake:	QT += core
基类:	QObject

所有的成员列表, 包括继承的成员

公有函数

	QObjectCleanupHandler()
	~QObjectCleanupHandler()
QObject *	add(QObject *object)
void	clear()
bool	isEmpty() const
void	remove(QObject *object)

32 个公有函数继承自 QObject

其他继承的成员

1 个属性继承自 QObject
1 个公有槽函数继承自 QObject
2 个信号继承自 QObject
11 个静态公有成员继承自 QObject
9 个受保护的函数继承自 QObject

详细描述

The QObjectCleanupHandler class watches the lifetime of multiple QObjects.

A QObjectCleanupHandler is useful whenever you need to know when a number of QObjects that are owned by someone else have been deleted. This is important, for example, when referencing memory in an application that has been allocated in a shared library.

To keep track of some QObjects, create a QObjectCleanupHandler, and add() the objects you are interested in. If you are no longer interested in tracking a particular object, use remove() to remove it from the cleanup handler. If an object being tracked by the cleanup handler gets deleted by someone else it will automatically be removed from the cleanup handler. You can delete all the objects in the cleanup handler with clear(), or by destroying the cleanup handler. isEmpty() returns true if the QObjectCleanupHandler has no objects to keep track of.

参见 QPointer.

成员函数

QObjectCleanupHandler::QObjectCleanupHandler()

Constructs an empty QObjectCleanupHandler.

QObjectCleanupHandler::~QObjectCleanupHandler()

Destroys the cleanup handler. All objects in this cleanup handler will be deleted.

参见 clear().

QObject *QObjectCleanupHandler::add(QObject **object*)

Adds object to this cleanup handler and returns the pointer to the object.

参见 remove().

void QObjectCleanupHandler::clear()

Deletes all objects in this cleanup handler. The cleanup handler becomes empty.

参见 isEmpty().

bool QObjectCleanupHandler::isEmpty() const

Returns true if this cleanup handler is empty or if all objects in this cleanup handler have been destroyed; otherwise return false.

参见 add(), remove(), and clear().

void QObjectCleanupHandler::remove(QObject **object*)

Removes the object from this cleanup handler. The object will not be destroyed.

参见 add().

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