# QTcpServer Class Reference
## [[QtNetwork](index.htm) module]
該QTcpServer既可類提供了一個基于TCP的服務器。[More...](#details)
繼承[QObject](qobject.html)。
### Methods
* `__init__ (self, QObject?parent?=?None)`
* `addPendingConnection (self, QTcpSocket?socket)`
* `close (self)`
* `QString errorString (self)`
* `bool hasPendingConnections (self)`
* `incomingConnection (self, int?handle)`
* `bool isListening (self)`
* `bool listen (self, QHostAddress?address?=?QHostAddress.Any, int?port?=?0)`
* `int maxPendingConnections (self)`
* `QTcpSocket nextPendingConnection (self)`
* `QNetworkProxy proxy (self)`
* `QHostAddress serverAddress (self)`
* `QAbstractSocket.SocketError serverError (self)`
* `int serverPort (self)`
* `setMaxPendingConnections (self, int?numConnections)`
* `setProxy (self, QNetworkProxy?networkProxy)`
* `bool setSocketDescriptor (self, int?socketDescriptor)`
* `int socketDescriptor (self)`
* `(bool, bool?timedOut) waitForNewConnection (self, int?msecs?=?0)`
### Qt Signals
* `void newConnection ()`
* * *
## Detailed Description
該QTcpServer既可類提供了一個基于TCP的服務器。
這個類使得它可以接受傳入的TCP連接。您可以指定端口或有QTcpServer既可選擇一個自動。你可以監聽一個特定的地址或所有機器的地址。
Call [listen](qtcpserver.html#listen)( )使服務器偵聽傳入的連接。該[newConnection](qtcpserver.html#newConnection)( )信號,然后每個客戶端連接到服務器時發出的。
Call [nextPendingConnection](qtcpserver.html#nextPendingConnection)( )接受掛起的連接作為一個連接[QTcpSocket](qtcpsocket.html)。該函數返回一個指針,指向一個[QTcpSocket](qtcpsocket.html)在[QAbstractSocket.ConnectedState](qabstractsocket.html#SocketState-enum)您可以使用與客戶端通信。
如果發生錯誤,[serverError](qtcpserver.html#serverError)()返回的錯誤的類型,并且[errorString](qtcpserver.html#errorString)( )可以被調用來獲取發生了什么可讀的描述。
當偵聽連接的地址和端口的服務器正在監聽可作為[serverAddress](qtcpserver.html#serverAddress)()和[serverPort](qtcpserver.html#serverPort)( ) 。
調用[close](qtcpserver.html#close)( )使得QTcpServer既可停止偵聽傳入的連接。
雖然QTcpServer既可主要是設計用于與一個事件循環使用,它可以使用它沒有之一。在這種情況下,您必須使用[waitForNewConnection](qtcpserver.html#waitForNewConnection)( ) ,這阻止,直到一個連接可用或者超時。
### Symbian Platform Security Requirements
在Symbian ,它使用這個類的進程必須有`NetworkServices`平臺的安全能力。如果客戶端程序缺乏這種能力,它會導致恐慌。
平臺的安全功能是通過添加[TARGET.CAPABILITY](index.htm#target-capability)qmake的變量。
* * *
## Method Documentation
```
QTcpServer.__init__ (self, QObject?parent?=?None)
```
該_parent_的說法,如果不是沒有,原因_self_通過Qt的,而不是PyQt的擁有。
構造一個[QTcpServer](qtcpserver.html)對象。
_parent_被傳遞到[QObject](qobject.html)構造函數。
**See also** [listen](qtcpserver.html#listen)()和[setSocketDescriptor](qtcpserver.html#setSocketDescriptor)( ) 。
```
QTcpServer.addPendingConnection (self, QTcpSocket?socket)
```
調用此函數由[QTcpServer.incomingConnection](qtcpserver.html#incomingConnection)( )來添加_socket_要掛起傳入連接的列表。
**Note:**不要忘了從重新實現調用這個成員[incomingConnection](qtcpserver.html#incomingConnection)()如果你不想打破掛起連接機制。
此功能被引入Qt的4.7 。
**See also** [incomingConnection](qtcpserver.html#incomingConnection)( ) 。
```
QTcpServer.close (self)
```
關閉服務器。該服務器將不再偵聽傳入的連接。
**See also** [listen](qtcpserver.html#listen)( ) 。
```
QString QTcpServer.errorString (self)
```
返回上次發生錯誤的可讀描述。
**See also** [serverError](qtcpserver.html#serverError)( ) 。
```
bool QTcpServer.hasPendingConnections (self)
```
返回True ,如果服務器有一個掛起的連接,否則返回False 。
**See also** [nextPendingConnection](qtcpserver.html#nextPendingConnection)()和[setMaxPendingConnections](qtcpserver.html#setMaxPendingConnections)( ) 。
```
QTcpServer.incomingConnection (self, int?handle)
```
這個虛函數被調用[QTcpServer](qtcpserver.html)當一個新的連接可用。該_socketDescriptor_參數是為接受的連接的本地套接字描述符。
該基地實現創建一個[QTcpSocket](qtcpsocket.html),設置套接字描述符,然后存儲[QTcpSocket](qtcpsocket.html)在掛起連接的內部清單。最后[newConnection](qtcpserver.html#newConnection)()被發射。
重新實現這個函數來改變服務器的行為,當一個連接可用。
如果該服務器使用[QNetworkProxy](qnetworkproxy.html)那么_socketDescriptor_可能與原生socket函數使用,并且只應使用[QTcpSocket.setSocketDescriptor](qabstractsocket.html#setSocketDescriptor)( ) 。
**Note:**如果你想處理的新傳入的連接[QTcpSocket](qtcpsocket.html)在另一個線程對象,你必須將socketDescriptor傳遞給其他線程,并創建[QTcpSocket](qtcpsocket.html)有對象并使用其[setSocketDescriptor](qtcpserver.html#setSocketDescriptor)()方法。
**See also** [newConnection](qtcpserver.html#newConnection)( )[nextPendingConnection](qtcpserver.html#nextPendingConnection)()和[addPendingConnection](qtcpserver.html#addPendingConnection)( ) 。
```
bool QTcpServer.isListening (self)
```
返回True如果服務器當前正在偵聽傳入連接,否則返回False 。
**See also** [listen](qtcpserver.html#listen)( ) 。
```
bool QTcpServer.listen (self, QHostAddress?address?=?QHostAddress.Any, int?port?=?0)
```
告訴服務器監聽的地址傳入的連接_address_和端口_port_。如果_port_為0 ,端口會自動選擇。如果_address_ is [QHostAddress.Any](qhostaddress.html#SpecialAddress-enum),服務器將監聽所有網絡接口。
成功時返回TRUE ,否則返回False 。
**See also** [isListening](qtcpserver.html#isListening)( ) 。
```
int QTcpServer.maxPendingConnections (self)
```
返回未決接受的連接的最大數目。默認值是30 。
**See also** [setMaxPendingConnections](qtcpserver.html#setMaxPendingConnections)()和[hasPendingConnections](qtcpserver.html#hasPendingConnections)( ) 。
```
QTcpSocket QTcpServer.nextPendingConnection (self)
```
[](qtcpsocket.html)
[返回的連接下一個待連接](qtcpsocket.html)[QTcpSocket](qtcpsocket.html)對象。
套接字被作為服務器的一個子創建的,這意味著它被自動刪除時[QTcpServer](qtcpserver.html)對象被銷毀。它仍然是一個好主意,明確地刪除的對象,當你用它做,以避免浪費內存。
如果這個函數被調用時,有沒有掛起的連接則返回0 。
**Note:**返回[QTcpSocket](qtcpsocket.html)對象不能被用于從另一個線程。如果你想使用從另一個線程傳入的連接,你需要重寫[incomingConnection](qtcpserver.html#incomingConnection)( ) 。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)( ) 。
```
QNetworkProxy QTcpServer.proxy (self)
```
[](qnetworkproxy.html)
[返回此套接字的網絡代理。默認情況下,](qnetworkproxy.html)[QNetworkProxy.DefaultProxy](qnetworkproxy.html#ProxyType-enum)被使用。
這個函數是Qt 4.1中引入。
**See also** [setProxy](qtcpserver.html#setProxy)()和[QNetworkProxy](qnetworkproxy.html)。
```
QHostAddress QTcpServer.serverAddress (self)
```
[](qhostaddress.html)
[返回如果服務器正在監聽等待連接的服務器的地址,否則返回](qhostaddress.html)[QHostAddress.Null](qhostaddress.html#SpecialAddress-enum)。
**See also** [serverPort](qtcpserver.html#serverPort)()和[listen](qtcpserver.html#listen)( ) 。
```
QAbstractSocket.SocketError QTcpServer.serverError (self)
```
[
所發生的最后一個錯誤返回一個錯誤代碼。
](qabstractsocket.html#SocketError-enum)
[**See also**](qabstractsocket.html#SocketError-enum) [errorString](qtcpserver.html#errorString)( ) 。
```
int QTcpServer.serverPort (self)
```
返回如果服務器偵聽連接服務器的端口,否則返回0 。
**See also** [serverAddress](qtcpserver.html#serverAddress)()和[listen](qtcpserver.html#listen)( ) 。
```
QTcpServer.setMaxPendingConnections (self, int?numConnections)
```
設置掛起接受的最大連接數_numConnections_。[QTcpServer](qtcpserver.html)將接受不超過_numConnections_前傳入的連接[nextPendingConnection](qtcpserver.html#nextPendingConnection)()被調用。默認情況下,該限制是30未決的連接。
客戶可能仍然能夠服務器后連接已經達到了掛起連接的最大數目(即,[QTcpSocket](qtcpsocket.html)依然能發出連接( )信號) 。[QTcpServer](qtcpserver.html)將停止接受新的連接,但操作系統仍可能保持他們在隊列中。
**See also** [maxPendingConnections](qtcpserver.html#maxPendingConnections)()和[hasPendingConnections](qtcpserver.html#hasPendingConnections)( ) 。
```
QTcpServer.setProxy (self, QNetworkProxy?networkProxy)
```
設置此套接字明確網絡代理_networkProxy_。
要禁用使用代理的這個插座,使用[QNetworkProxy.NoProxy](qnetworkproxy.html#ProxyType-enum)代理類型:
```
server->setProxy([QNetworkProxy](qnetworkproxy.html).NoProxy);
```
這個函數是Qt 4.1中引入。
**See also** [proxy](qtcpserver.html#proxy)()和[QNetworkProxy](qnetworkproxy.html)。
```
bool QTcpServer.setSocketDescriptor (self, int?socketDescriptor)
```
設置套接字描述符偵聽傳入的連接時,該服務器應該使用_socketDescriptor_。返回True如果套接字設置成功,否則返回False 。
該插座被假定為處于監聽狀態。
**See also** [socketDescriptor](qtcpserver.html#socketDescriptor)()和[isListening](qtcpserver.html#isListening)( ) 。
```
int QTcpServer.socketDescriptor (self)
```
返回服務器用來偵聽傳入的指令,或-1,如果服務器沒有監聽本地套接字描述符。
如果服務器使用[QNetworkProxy](qnetworkproxy.html),返回的描述符可能無法與原生socket函數使用。
**See also** [setSocketDescriptor](qtcpserver.html#setSocketDescriptor)()和[isListening](qtcpserver.html#isListening)( ) 。
```
(bool, bool?timedOut) QTcpServer.waitForNewConnection (self, int?msecs?=?0)
```
最多等待_msec_毫秒或直到傳入的連接是可用的。返回True如果連接可用,否則返回False 。如果操作超時,_timedOut_不為0, *_timedOut_將被設置為True。
這是一個阻塞函數調用。它的使用disadvised在一個單線程的GUI應用程序,因為整個應用程序將停止響應,直到函數返回。當沒有事件循環可用waitForNewConnection ( )是最有用。
非阻塞的替代方法是連接到[newConnection](qtcpserver.html#newConnection)()信號。
如果毫秒為-1 ,此功能將不會超時。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)()和[nextPendingConnection](qtcpserver.html#nextPendingConnection)( ) 。
* * *
## Qt Signal Documentation
```
void newConnection ()
```
這是該信號的默認超載。
每當一個新的連接是可用的,這個信號被發射。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)()和[nextPendingConnection](qtcpserver.html#nextPendingConnection)( ) 。
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- QPyDesignerMemberSheetExtension Class Reference
- QPyDesignerPropertySheetExtension Class Reference
- QPyDesignerTaskMenuExtension Class Reference
- QPyNullVariant Class Reference
- QPyTextObject Class Reference
- QQuaternion Class Reference
- QRadialGradient Class Reference
- QRadioButton Class Reference
- QRawFont Class Reference
- QReadLocker Class Reference
- QReadWriteLock Class Reference
- QRect Class Reference
- QRectF Class Reference
- QRegExp Class Reference
- QRegExpValidator Class Reference
- QRegion Class Reference
- QResizeEvent Class Reference
- QResource Class Reference
- QRubberBand Class Reference
- QRunnable Class Reference
- QScriptClass Class Reference
- QScriptClassPropertyIterator Class Reference
- QScriptContext Class Reference
- QScriptContextInfo Class Reference
- QScriptEngine Class Reference
- QScriptEngineAgent Class Reference
- QScriptEngineDebugger Class Reference
- QScriptString Class Reference
- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文檔翻譯:Qt樣式單參考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- 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