# QXmlSchemaValidator Class Reference
## [[QtXmlPatterns](index.htm) module]
该QXmlSchemaValidator类验证XML实例文档对W3C XML架构。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, QXmlSchema schema)`
* `QAbstractMessageHandler messageHandler (self)`
* `QXmlNamePool namePool (self)`
* `QNetworkAccessManager networkAccessManager (self)`
* `QXmlSchema schema (self)`
* `setMessageHandler (self, QAbstractMessageHandler handler)`
* `setNetworkAccessManager (self, QNetworkAccessManager networkmanager)`
* `setSchema (self, QXmlSchema schema)`
* `setUriResolver (self, QAbstractUriResolver resolver)`
* `QAbstractUriResolver uriResolver (self)`
* `bool validate (self, QUrl source)`
* `bool validate (self, QIODevice source, QUrl documentUri = QUrl())`
* `bool validate (self, QByteArray data, QUrl documentUri = QUrl())`
* * *
## Detailed Description
该QXmlSchemaValidator类验证XML实例文档对W3C XML架构。
该QXmlSchemaValidator类加载，解析一个XML实例文档，并对其进行验证已编译与W3C XML模式[QXmlSchema](qxmlschema.html)。
下面的示例演示如何从本地文件中加载XML架构，检查它是否是一个有效的模式文档，并将其用于XML实例文档的验证：
```
[QUrl](qurl.html) schemaUrl("file:///home/user/schema.xsd");
[QXmlSchema](qxmlschema.html) schema;
schema.load(schemaUrl);
if (schema.isValid()) {
[QFile](qfile.html) file("test.xml");
file.open([QIODevice](qiodevice.html).ReadOnly);
QXmlSchemaValidator validator(schema);
if (validator.validate(&file, [QUrl](qurl.html).fromLocalFile(file.fileName())))
qDebug() << "instance document is valid";
else
qDebug() << "instance document is invalid";
}
```
### XML Schema Version
根据这个类实现模式验证[XML Schema](http://www.w3.org/XML/Schema)1.0规范。
* * *
## Method Documentation
```
QXmlSchemaValidator.__init__ (self)
```
构造一个模式验证。用于验证的架构必须在XML实例文档中通过引用`xsi:schemaLocation` or `xsi:noNamespaceSchemaLocation`属性。
```
QXmlSchemaValidator.__init__ (self, QXmlSchema schema)
```
构建将使用模式验证_schema_进行验证。如果空[QXmlSchema](qxmlschema.html)模式被传递给验证器，用于验证的架构，必须在XML实例文档中通过引用`xsi:schemaLocation` or `xsi:noNamespaceSchemaLocation`属性。
```
QAbstractMessageHandler QXmlSchemaValidator.messageHandler (self)
```
[](qabstractmessagehandler.html)
[返回处理这个解析和验证消息的消息处理程序](qabstractmessagehandler.html)[QXmlSchemaValidator](qxmlschemavalidator.html)。
**See also** [setMessageHandler](qxmlschemavalidator.html#setMessageHandler)（ ） 。
```
QXmlNamePool QXmlSchemaValidator.namePool (self)
```
[](qxmlnamepool.html)
[返回此名称池](qxmlnamepool.html)[QXmlSchemaValidator](qxmlschemavalidator.html)构建[names](qxmlname.html)。有没有setter的名字池，因为混合池的名称会导致错误，由于名称的混乱。
```
QNetworkAccessManager QXmlSchemaValidator.networkAccessManager (self)
```
[
返回该网络管理器，或0 ，如果它没有被设置。
](qnetworkaccessmanager.html)
[**See also**](qnetworkaccessmanager.html) [setNetworkAccessManager](qxmlschemavalidator.html#setNetworkAccessManager)（ ） 。
```
QXmlSchema QXmlSchemaValidator.schema (self)
```
[
返回一个用于验证的架构。
](qxmlschema.html)
[**See also**](qxmlschema.html) [setSchema](qxmlschemavalidator.html#setSchema)（ ） 。
```
QXmlSchemaValidator.setMessageHandler (self, QAbstractMessageHandler handler)
```
更改[message handler](qabstractmessagehandler.html)这[QXmlSchemaValidator](qxmlschemavalidator.html)至_handler_。模式验证器将所有解析和验证消息，此消息处理程序。[QXmlSchemaValidator](qxmlschemavalidator.html)不采取所有权_handler_。
通常情况下，默认的消息处理就足够了。它写的编译和验证消息的_stderr_。默认的消息处理程序，包括颜色代码，如果_stderr_可以使色彩。
When [QXmlSchemaValidator](qxmlschemavalidator.html)电话[QAbstractMessageHandler.message](qabstractmessagehandler.html#message)（ ） ，参数如下：
| message() argument | Semantics |
| --- | --- |
| [QtMsgType](index.htm#QtMsgType-enum) type | Only [QtWarningMsg](index.htm#QtMsgType-enum) and [QtFatalMsg](index.htm#QtMsgType-enum) are used. The former identifies a warning, while the latter identifies an error. |
| const [QString](qstring.html) & description | An XHTML document which is the actual message. It is translated into the current language. |
| const [QUrl](qurl.html) &identifier | Identifies the error with a URI, where the fragment is the error code, and the rest of the URI is the error namespace. |
| const [QSourceLocation](qsourcelocation.html) & sourceLocation | Identifies where the error occurred. |
**See also** [messageHandler](qxmlschemavalidator.html#messageHandler)（ ） 。
```
QXmlSchemaValidator.setNetworkAccessManager (self, QNetworkAccessManager networkmanager)
```
设置网络管理员_manager_。[QXmlSchemaValidator](qxmlschemavalidator.html)不采取所有权_manager_。
**See also** [networkAccessManager](qxmlschemavalidator.html#networkAccessManager)（ ） 。
```
QXmlSchemaValidator.setSchema (self, QXmlSchema schema)
```
设置_schema_这将用于进一步的验证。如果架构是空的，用于验证的架构，必须在XML实例文档中通过引用`xsi:schemaLocation` or `xsi:noNamespaceSchemaLocation`属性。
**See also** [schema](qxmlschemavalidator.html#schema)（ ） 。
```
QXmlSchemaValidator.setUriResolver (self, QAbstractUriResolver resolver)
```
设置的URI解析器_resolver_。[QXmlSchemaValidator](qxmlschemavalidator.html)不采取所有权_resolver_。
**See also** [uriResolver](qxmlschemavalidator.html#uriResolver)（ ） 。
```
QAbstractUriResolver QXmlSchemaValidator.uriResolver (self)
```
[](qabstracturiresolver.html)
[返回架构的URI解析器。如果没有的URI解析器已定，](qabstracturiresolver.html)[QtXmlPatterns](index.htm)将使用的URI的实例文档，因为它们。
这个URI解析器提供了一个抽象层，或_polymorphic URIs_。解析器可以重写_logical_URI与物理的，或者它可以翻译过时的或无效的URI来有效的。
When [QtXmlPatterns](index.htm)电话[QAbstractUriResolver.resolve](qabstracturiresolver.html#resolve)（ ）的绝对URI是由架构规范规定的URI和相对URI是由用户指定的URI。
**See also** [setUriResolver](qxmlschemavalidator.html#setUriResolver)（ ） 。
```
bool QXmlSchemaValidator.validate (self, QUrl source)
```
验证读取XML实例文档_source_针对架构。
Returns `true`如果根据模式的XML实例文档是有效的，`false`否则。
例如：
```
const [QXmlSchema](qxmlschema.html) schema = getSchema();
const [QUrl](qurl.html) url("http://www.schema-example.org/test.xml");
[QXmlSchemaValidator](qxmlschemavalidator.html) validator(schema);
if (validator.validate(url))
qDebug() << "instance document is valid";
else
qDebug() << "instance document is invalid";
```
```
bool QXmlSchemaValidator.validate (self, QIODevice source, QUrl documentUri = QUrl())
```
验证读取XML实例文档_source_用给定的_documentUri_针对架构。
Returns `true`如果根据模式的XML实例文档是有效的，`false`否则。
例如：
```
const [QXmlSchema](qxmlschema.html) schema = getSchema();
[QFile](qfile.html) file("test.xml");
file.open([QIODevice](qiodevice.html).ReadOnly);
[QXmlSchemaValidator](qxmlschemavalidator.html) validator(schema);
if (validator.validate(&file, [QUrl](qurl.html).fromLocalFile(file.fileName())))
qDebug() << "instance document is valid";
else
qDebug() << "instance document is invalid";
```
```
bool QXmlSchemaValidator.validate (self, QByteArray data, QUrl documentUri = QUrl())
```
验证读取XML实例文档_data_用给定的_documentUri_针对架构。
Returns `true`如果根据模式的XML实例文档是有效的，`false`否则。
例如：
```
const [QXmlSchema](qxmlschema.html) schema = getSchema();
[QByteArray](qbytearray.html) data("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
"<test></test>");
[QBuffer](qbuffer.html) buffer(&data);
buffer.open([QIODevice](qiodevice.html).ReadOnly);
[QXmlSchemaValidator](qxmlschemavalidator.html) validator(schema);
if (validator.validate(&buffer))
qDebug() << "instance document is valid";
else
qDebug() << "instance document is invalid";
```
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- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference