# QTcpServer Class Reference
## [[QtNetwork](index.htm) module]
该QTcpServer既可类提供了一个基于TCP的服务器。[More...](#details)
继承[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
该QTcpServer既可类提供了一个基于TCP的服务器。
这个类使得它可以接受传入的TCP连接。您可以指定端口或有QTcpServer既可选择一个自动。你可以监听一个特定的地址或所有机器的地址。
Call [listen](qtcpserver.html#listen)（ ）使服务器侦听传入的连接。该[newConnection](qtcpserver.html#newConnection)（ ）信号，然后每个客户端连接到服务器时发出的。
Call [nextPendingConnection](qtcpserver.html#nextPendingConnection)（ ）接受挂起的连接作为一个连接[QTcpSocket](qtcpsocket.html)。该函数返回一个指针，指向一个[QTcpSocket](qtcpsocket.html)在[QAbstractSocket.ConnectedState](qabstractsocket.html#SocketState-enum)您可以使用与客户端通信。
如果发生错误，[serverError](qtcpserver.html#serverError)（）返回的错误的类型，并且[errorString](qtcpserver.html#errorString)（ ）可以被调用来获取发生了什么可读的描述。
当侦听连接的地址和端口的服务器正在监听可作为[serverAddress](qtcpserver.html#serverAddress)（）和[serverPort](qtcpserver.html#serverPort)（ ） 。
调用[close](qtcpserver.html#close)（ ）使得QTcpServer既可停止侦听传入的连接。
虽然QTcpServer既可主要是设计用于与一个事件循环使用，它可以使用它没有之一。在这种情况下，您必须使用[waitForNewConnection](qtcpserver.html#waitForNewConnection)（ ） ，这阻止，直到一个连接可用或者超时。
### Symbian Platform Security Requirements
在Symbian ，它使用这个类的进程必须有`NetworkServices`平台的安全能力。如果客户端程序缺乏这种能力，它会导致恐慌。
平台的安全功能是通过添加[TARGET.CAPABILITY](index.htm#target-capability)qmake的变量。
* * *
## Method Documentation
```
QTcpServer.__init__ (self, QObject parent = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QTcpServer](qtcpserver.html)对象。
_parent_被传递到[QObject](qobject.html)构造函数。
**See also** [listen](qtcpserver.html#listen)（）和[setSocketDescriptor](qtcpserver.html#setSocketDescriptor)（ ） 。
```
QTcpServer.addPendingConnection (self, QTcpSocket socket)
```
调用此函数由[QTcpServer.incomingConnection](qtcpserver.html#incomingConnection)（ ）来添加_socket_要挂起传入连接的列表。
**Note:**不要忘了从重新实现调用这个成员[incomingConnection](qtcpserver.html#incomingConnection)（）如果你不想打破挂起连接机制。
此功能被引入Qt的4.7 。
**See also** [incomingConnection](qtcpserver.html#incomingConnection)（ ） 。
```
QTcpServer.close (self)
```
关闭服务器。该服务器将不再侦听传入的连接。
**See also** [listen](qtcpserver.html#listen)（ ） 。
```
QString QTcpServer.errorString (self)
```
返回上次发生错误的可读描述。
**See also** [serverError](qtcpserver.html#serverError)（ ） 。
```
bool QTcpServer.hasPendingConnections (self)
```
返回True ，如果服务器有一个挂起的连接，否则返回False 。
**See also** [nextPendingConnection](qtcpserver.html#nextPendingConnection)（）和[setMaxPendingConnections](qtcpserver.html#setMaxPendingConnections)（ ） 。
```
QTcpServer.incomingConnection (self, int handle)
```
这个虚函数被调用[QTcpServer](qtcpserver.html)当一个新的连接可用。该_socketDescriptor_参数是为接受的连接的本地套接字描述符。
该基地实现创建一个[QTcpSocket](qtcpsocket.html)，设置套接字描述符，然后存储[QTcpSocket](qtcpsocket.html)在挂起连接的内部清单。最后[newConnection](qtcpserver.html#newConnection)（）被发射。
重新实现这个函数来改变服务器的行为，当一个连接可用。
如果该服务器使用[QNetworkProxy](qnetworkproxy.html)那么_socketDescriptor_可能与原生socket函数使用，并且只应使用[QTcpSocket.setSocketDescriptor](qabstractsocket.html#setSocketDescriptor)（ ） 。
**Note:**如果你想处理的新传入的连接[QTcpSocket](qtcpsocket.html)在另一个线程对象，你必须将socketDescriptor传递给其他线程，并创建[QTcpSocket](qtcpsocket.html)有对象并使用其[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如果服务器当前正在侦听传入连接，否则返回False 。
**See also** [listen](qtcpserver.html#listen)（ ） 。
```
bool QTcpServer.listen (self, QHostAddress address = QHostAddress.Any, int port = 0)
```
告诉服务器监听的地址传入的连接_address_和端口_port_。如果_port_为0 ，端口会自动选择。如果_address_ is [QHostAddress.Any](qhostaddress.html#SpecialAddress-enum)，服务器将监听所有网络接口。
成功时返回TRUE ，否则返回False 。
**See also** [isListening](qtcpserver.html#isListening)（ ） 。
```
int QTcpServer.maxPendingConnections (self)
```
返回未决接受的连接的最大数目。默认值是30 。
**See also** [setMaxPendingConnections](qtcpserver.html#setMaxPendingConnections)（）和[hasPendingConnections](qtcpserver.html#hasPendingConnections)（ ） 。
```
QTcpSocket QTcpServer.nextPendingConnection (self)
```
[](qtcpsocket.html)
[返回的连接下一个待连接](qtcpsocket.html)[QTcpSocket](qtcpsocket.html)对象。
套接字被作为服务器的一个子创建的，这意味着它被自动删除时[QTcpServer](qtcpserver.html)对象被销毁。它仍然是一个好主意，明确地删除的对象，当你用它做，以避免浪费内存。
如果这个函数被调用时，有没有挂起的连接则返回0 。
**Note:**返回[QTcpSocket](qtcpsocket.html)对象不能被用于从另一个线程。如果你想使用从另一个线程传入的连接，你需要重写[incomingConnection](qtcpserver.html#incomingConnection)（ ） 。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)（ ） 。
```
QNetworkProxy QTcpServer.proxy (self)
```
[](qnetworkproxy.html)
[返回此套接字的网络代理。默认情况下，](qnetworkproxy.html)[QNetworkProxy.DefaultProxy](qnetworkproxy.html#ProxyType-enum)被使用。
这个函数是Qt 4.1中引入。
**See also** [setProxy](qtcpserver.html#setProxy)（）和[QNetworkProxy](qnetworkproxy.html)。
```
QHostAddress QTcpServer.serverAddress (self)
```
[](qhostaddress.html)
[返回如果服务器正在监听等待连接的服务器的地址，否则返回](qhostaddress.html)[QHostAddress.Null](qhostaddress.html#SpecialAddress-enum)。
**See also** [serverPort](qtcpserver.html#serverPort)（）和[listen](qtcpserver.html#listen)（ ） 。
```
QAbstractSocket.SocketError QTcpServer.serverError (self)
```
[
所发生的最后一个错误返回一个错误代码。
](qabstractsocket.html#SocketError-enum)
[**See also**](qabstractsocket.html#SocketError-enum) [errorString](qtcpserver.html#errorString)（ ） 。
```
int QTcpServer.serverPort (self)
```
返回如果服务器侦听连接服务器的端口，否则返回0 。
**See also** [serverAddress](qtcpserver.html#serverAddress)（）和[listen](qtcpserver.html#listen)（ ） 。
```
QTcpServer.setMaxPendingConnections (self, int numConnections)
```
设置挂起接受的最大连接数_numConnections_。[QTcpServer](qtcpserver.html)将接受不超过_numConnections_前传入的连接[nextPendingConnection](qtcpserver.html#nextPendingConnection)（）被调用。默认情况下，该限制是30未决的连接。
客户可能仍然能够服务器后连接已经达到了挂起连接的最大数目（即，[QTcpSocket](qtcpsocket.html)依然能发出连接（ ）信号） 。[QTcpServer](qtcpserver.html)将停止接受新的连接，但操作系统仍可能保持他们在队列中。
**See also** [maxPendingConnections](qtcpserver.html#maxPendingConnections)（）和[hasPendingConnections](qtcpserver.html#hasPendingConnections)（ ） 。
```
QTcpServer.setProxy (self, QNetworkProxy networkProxy)
```
设置此套接字明确网络代理_networkProxy_。
要禁用使用代理的这个插座，使用[QNetworkProxy.NoProxy](qnetworkproxy.html#ProxyType-enum)代理类型：
```
server->setProxy([QNetworkProxy](qnetworkproxy.html).NoProxy);
```
这个函数是Qt 4.1中引入。
**See also** [proxy](qtcpserver.html#proxy)（）和[QNetworkProxy](qnetworkproxy.html)。
```
bool QTcpServer.setSocketDescriptor (self, int socketDescriptor)
```
设置套接字描述符侦听传入的连接时，该服务器应该使用_socketDescriptor_。返回True如果套接字设置成功，否则返回False 。
该插座被假定为处于监听状态。
**See also** [socketDescriptor](qtcpserver.html#socketDescriptor)（）和[isListening](qtcpserver.html#isListening)（ ） 。
```
int QTcpServer.socketDescriptor (self)
```
返回服务器用来侦听传入的指令，或-1，如果服务器没有监听本地套接字描述符。
如果服务器使用[QNetworkProxy](qnetworkproxy.html)，返回的描述符可能无法与原生socket函数使用。
**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_毫秒或直到传入的连接是可用的。返回True如果连接可用，否则返回False 。如果操作超时，_timedOut_不为0， *_timedOut_将被设置为True。
这是一个阻塞函数调用。它的使用disadvised在一个单线程的GUI应用程序，因为整个应用程序将停止响应，直到函数返回。当没有事件循环可用waitForNewConnection （ ）是最有用。
非阻塞的替代方法是连接到[newConnection](qtcpserver.html#newConnection)（）信号。
如果毫秒为-1 ，此功能将不会超时。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)（）和[nextPendingConnection](qtcpserver.html#nextPendingConnection)（ ） 。
* * *
## Qt Signal Documentation
```
void newConnection ()
```
这是该信号的默认超载。
每当一个新的连接是可用的，这个信号被发射。
**See also** [hasPendingConnections](qtcpserver.html#hasPendingConnections)（）和[nextPendingConnection](qtcpserver.html#nextPendingConnection)（ ） 。
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- 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文档翻译：Qt样式单参考,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