QDomNodeList 类

QDomNodeList 类是列表在 QDomNode 对象。 更多...

头：	#include <QDomNodeList>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Xml) target_link_libraries(mytarget PRIVATE Qt6::Xml)
qmake:	QT += xml

• 所有成员列表，包括继承成员
• QDomNodeList is part of XML 类 .

注意： 此类的所有函数 可重入 .

公共类型

(从 6.9 起)	const_iterator
(从 6.9 起)	const_pointer
(从 6.9 起)	const_reference
(从 6.9 起)	const_reverse_iterator
(从 6.9 起)	difference_type
(从 6.9 起)	pointer
(从 6.9 起)	reference
(从 6.9 起)	value_type

公共函数

	QDomNodeList ()
	QDomNodeList (const QDomNodeList & nodeList )
	~QDomNodeList ()
QDomNode	at (int index ) const
(从 6.9 起) QDomNodeList::const_iterator	begin () const
(从 6.9 起) QDomNodeList::const_iterator	cbegin () const
(从 6.9 起) QDomNodeList::const_iterator	cend () const
(从 6.9 起) QDomNodeList::const_iterator	constBegin () const
(从 6.9 起) QDomNodeList::const_iterator	constEnd () const
int	count () const
(从 6.9 起) QDomNodeList::const_reverse_iterator	crbegin () const
(从 6.9 起) QDomNodeList::const_reverse_iterator	crend () const
(从 6.9 起) QDomNodeList::const_iterator	end () const
bool	isEmpty () const
QDomNode	item (int index ) const
int	length () const
(从 6.9 起) QDomNodeList::const_reverse_iterator	rbegin () const
(从 6.9 起) QDomNodeList::const_reverse_iterator	rend () const
int	size () const
QDomNodeList &	operator= (const QDomNodeList & other )

相关非成员

bool	operator!= (const QDomNodeList & lhs , const QDomNodeList & rhs )
bool	operator== (const QDomNodeList & lhs , const QDomNodeList & rhs )

详细描述

列表的获得可以通过 QDomDocument::elementsByTagName () 和 QDomNode::childNodes ()。DOM (文档对象模型) 要求这些列表是 "实时" 的：每当改变底层文档时，会更新列表内容。

可以从列表获取特定节点采用 item ()。列表项数的返回是通过 length ().

有关文档对象模型的进一步信息，见 级别 1 and 级别 2 核心 。有关 DOM 实现的更一般介绍，见 QDomDocument 文档编制。

另请参阅 QDomNode::childNodes () 和 QDomDocument::elementsByTagName ().

成员类型文档编制

[alias, since 6.9] QDomNodeList:: const_iterator

[alias, since 6.9] QDomNodeList:: const_reverse_iterator

Typedefs for an opaque class that implements a bidirectional iterator over a QDomNodeList .

注意： QDomNodeList does not support modifying nodes in-place, so there is no mutable iterator.

These typedefs were introduced in Qt 6.9.

[alias, since 6.9] QDomNodeList:: const_pointer

[alias, since 6.9] QDomNodeList:: const_reference

[alias, since 6.9] QDomNodeList:: difference_type

[alias, since 6.9] QDomNodeList:: pointer

[alias, since 6.9] QDomNodeList:: reference

[alias, since 6.9] QDomNodeList:: value_type

Provided for STL-compatibility.

注意： QDomNodeList does not support modifying nodes in-place, so reference and const_reference are the same type, as are pointer and const_pointer .

These typedefs were introduced in Qt 6.9.

成员函数文档编制

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: begin () const

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: cbegin () const

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: cend () const

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: constBegin () const

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: constEnd () const

[noexcept, since 6.9] QDomNodeList::const_iterator QDomNodeList:: end () const

[noexcept, since 6.9] QDomNodeList::const_reverse_iterator QDomNodeList:: crbegin () const

[noexcept, since 6.9] QDomNodeList::const_reverse_iterator QDomNodeList:: crend () const

[noexcept, since 6.9] QDomNodeList::const_reverse_iterator QDomNodeList:: rbegin () const

[noexcept, since 6.9] QDomNodeList::const_reverse_iterator QDomNodeList:: rend () const

返回 const_iterator or const_reverse_iterator , respectively, pointing to the first or one past the last item in the list.

注意： QDomNodeList does not support modifying nodes in-place, so there is no mutable iterator.

这些函数在 Qt 6.9 引入。

QDomNodeList:: QDomNodeList ()

创建空节点列表。

QDomNodeList:: QDomNodeList (const QDomNodeList & nodeList )

构造副本为 nodeList .

[noexcept] QDomNodeList:: ~QDomNodeList ()

销毁对象并释放其资源。

QDomNode QDomNodeList:: at ( int index ) const

提供此函数是为 Qt API 一致性。它相当于 item ().

若 index 为负或者若 index >= length () 则返回 null 节点 (即：节点的 QDomNode::isNull () 返回 true)。

int QDomNodeList:: count () const

提供此函数是为 Qt API 一致性。它相当于 length ().

bool QDomNodeList:: isEmpty () const

返回 true 若列表不包含项；否则返回 false 。此函数是为 Qt API 一致性提供的。

QDomNode QDomNodeList:: item ( int index ) const

返回节点在位置 index .

若 index 为负或者若 index >= length () 则返回 null 节点 (即：节点的 QDomNode::isNull () 返回 true)。

另请参阅 length ().

int QDomNodeList:: length () const

返回列表节点数。

int QDomNodeList:: size () const

提供此函数是为 Qt API 一致性。它相当于 length ().

QDomNodeList &QDomNodeList:: operator= (const QDomNodeList & other )

赋值 other 到此节点列表。

相关非成员

[noexcept] bool operator!= (const QDomNodeList & lhs , const QDomNodeList & rhs )

返回 true if the node lists lhs and rhs 不相等；则返回 false .

[noexcept] bool operator== (const QDomNodeList & lhs , const QDomNodeList & rhs )

返回 true if the node lists lhs and rhs 相等；否则返回 false .

内容

1. 公共类型

2. 公共函数

3. 相关非成员

4. 详细描述