QObjectCleanupHandler 类

QObjectCleanupHandler 类看守多个 QObject 的寿命。更多...

头：	#include <QObjectCleanupHandler>
qmake:	QT += core
继承：	QObject

所有成员列表，包括继承成员

公共函数

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

详细描述

A QObjectCleanupHandler is useful whenever you need to know when a number of QObject s 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 QObject s, 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 () 返回 true if the QObjectCleanupHandler has no objects to keep track of.

另请参阅 QPointer .

成员函数文档编制

QObjectCleanupHandler:: QObjectCleanupHandler ()

构造空的 QObjectCleanupHandler。

`[虚拟]` QObjectCleanupHandler:: ~QObjectCleanupHandler ()

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

另请参阅 clear ().

QObject QObjectCleanupHandler:: add ( QObject object )

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

另请参阅 remove ().

void QObjectCleanupHandler:: clear ()

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

另请参阅 isEmpty ().

bool QObjectCleanupHandler:: isEmpty () const

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

另请参阅 add (), remove ()，和 clear ().

void QObjectCleanupHandler:: remove ( QObject * object )

移除 object from this cleanup handler. The object will not be destroyed.

另请参阅 add ().