# QTextDocumentWriter Class Reference
## [[QtGui](index.htm) module]
该QTextDocumentWriter类提供与格式无关的接口，用于编写[QTextDocument](qtextdocument.html)对文件或其他装置。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, QIODevice device, QByteArray format)`
* `__init__ (self, QString fileName, QByteArray format = QByteArray())`
* `QTextCodec codec (self)`
* `QIODevice device (self)`
* `QString fileName (self)`
* `QByteArray format (self)`
* `setCodec (self, QTextCodec codec)`
* `setDevice (self, QIODevice device)`
* `setFileName (self, QString fileName)`
* `setFormat (self, QByteArray format)`
* `bool write (self, QTextDocument document)`
* `bool write (self, QTextDocumentFragment fragment)`
### Static Methods
* `list-of-QByteArray supportedDocumentFormats ()`
* * *
## Detailed Description
该QTextDocumentWriter类提供与格式无关的接口，用于编写[QTextDocument](qtextdocument.html)对文件或其他装置。
写一个文件，构造一个QTextDocumentWriter对象可以是文件名或一个设备对象，并指定要写入的文件格式。你可以构造一个作家，并使用设定的格式[setFormat](qtextdocumentwriter.html#setFormat)（ ）以后。
Call [write](qtextdocumentwriter.html#write)（）写的文件到该设备。如果文档被成功写入，这个函数返回True。但是，如果写文件时发生错误，将返回False 。
Call [supportedDocumentFormats](qtextdocumentwriter.html#supportedDocumentFormats)（ ）对于格式QTextDocumentWriter可以写一个清单。
由于所支持的输出格式的能力有很大的不同，笔者简单地输出各种格式对象的适当子集。这通常包括格式化的文本和文档中包含的图像。
* * *
## Method Documentation
```
QTextDocumentWriter.__init__ (self)
```
构造一个空[QTextDocumentWriter](qtextdocumentwriter.html)对象。写作之前，你必须调用[setFormat](qtextdocumentwriter.html#setFormat)（ ）来设置文档的格式，然后[setDevice](qtextdocumentwriter.html#setDevice)（）或[setFileName](qtextdocumentwriter.html#setFileName)（ ） 。
```
QTextDocumentWriter.__init__ (self, QIODevice device, QByteArray format)
```
构造一个[QTextDocumentWriter](qtextdocumentwriter.html)对象写入给定的_device_在由指定的文档格式_format_。
```
QTextDocumentWriter.__init__ (self, QString fileName, QByteArray format = QByteArray())
```
构造一个[QTextDocumentWriter](qtextdocumentwriter.html)对象将写入一个文件名为_fileName_使用由指定的文件格式_format_。如果_format_不设置，[QTextDocumentWriter](qtextdocumentwriter.html)将检测到的文件格式通过检查的延伸_fileName_。
```
QTextCodec QTextDocumentWriter.codec (self)
```
[
返回当前分配给该作家的编解码器。
](qtextcodec.html)
[**See also**](qtextcodec.html) [setCodec](qtextdocumentwriter.html#setCodec)（ ） 。
```
QIODevice QTextDocumentWriter.device (self)
```
[
返回当前分配的设备，或者0，如果没有设备已经被分配。
](qiodevice.html)
[**See also**](qiodevice.html) [setDevice](qtextdocumentwriter.html#setDevice)（ ） 。
```
QString QTextDocumentWriter.fileName (self)
```
如果当前分配装置是[QFile](qfile.html)，或者如果[setFileName](qtextdocumentwriter.html#setFileName)（）被调用时，该函数返回到被写入到该文件的名称。在所有其他情况下，它返回一个空字符串。
**See also** [setFileName](qtextdocumentwriter.html#setFileName)（）和[setDevice](qtextdocumentwriter.html#setDevice)（ ） 。
```
QByteArray QTextDocumentWriter.format (self)
```
[
返回用于书写文档的格式。
](qbytearray.html)
[**See also**](qbytearray.html) [setFormat](qtextdocumentwriter.html#setFormat)（ ） 。
```
QTextDocumentWriter.setCodec (self, QTextCodec codec)
```
设置编解码器，该流_codec_。编解码器是用于编码被写入任何数据。默认情况下，[QTextDocumentWriter](qtextdocumentwriter.html)使用UTF-8 。
**See also** [codec](qtextdocumentwriter.html#codec)（ ） 。
```
QTextDocumentWriter.setDevice (self, QIODevice device)
```
集作家的设备到_device_规定。如果设备已经设置，老设备被移除，但在其他方面保持不变。
如果该设备尚未打开，[QTextDocumentWriter](qtextdocumentwriter.html)将尝试在打开设备[QIODevice.WriteOnly](qiodevice.html#OpenModeFlag-enum)模式通过调用open （ ） 。
**Note:**这不会对某些设备，如工作[QProcess](qprocess.html)，[QTcpSocket](qtcpsocket.html)和[QUdpSocket](qudpsocket.html)，其中该装置之前，需要一些配置可以被打开。
**See also** [device](qtextdocumentwriter.html#device)（）和[setFileName](qtextdocumentwriter.html#setFileName)（ ） 。
```
QTextDocumentWriter.setFileName (self, QString fileName)
```
设置文件的要写入的名称_fileName_。在内部，[QTextDocumentWriter](qtextdocumentwriter.html)将创建一个[QFile](qfile.html)并在打开它[QIODevice.WriteOnly](qiodevice.html#OpenModeFlag-enum)模式，并编写文档时使用这个文件。
**See also** [fileName](qtextdocumentwriter.html#fileName)（）和[setDevice](qtextdocumentwriter.html#setDevice)（ ） 。
```
QTextDocumentWriter.setFormat (self, QByteArray format)
```
设置用于写文件的格式_format_规定。_format_是不区分大小写的文本字符串。例如：
```
[QTextDocumentWriter](qtextdocumentwriter.html) writer;
writer.setFormat("odf"); // same as writer.setFormat("ODF");
```
您可以致电[supportedDocumentFormats](qtextdocumentwriter.html#supportedDocumentFormats)（ ）对于格式的完整列表[QTextDocumentWriter](qtextdocumentwriter.html)支持。
**See also** [format](qtextdocumentwriter.html#format)（ ） 。
```
list-of-QByteArray QTextDocumentWriter.supportedDocumentFormats ()
```
返回的文档格式所支持的列表[QTextDocumentWriter](qtextdocumentwriter.html)。
默认情况下， Qt可以编写以下格式：
| Format | Description |
| --- | --- |
| plaintext | Plain text |
| HTML | HyperText Markup Language |
| ODF | OpenDocument Format |
**See also** [setFormat](qtextdocumentwriter.html#setFormat)（ ） 。
```
bool QTextDocumentWriter.write (self, QTextDocument document)
```
将给定_document_到指定的装置或档案，并成功返回True ，否则返回False 。
```
bool QTextDocumentWriter.write (self, QTextDocumentFragment fragment)
```
通过写入指定的文件片段_fragment_到指定的装置或档案，并成功返回True ，否则返回False 。
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- 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