# QDBusConnection Class Reference
## [[QtDBus](index.htm) module]
该QDBusConnection类代表到D - Bus总线守护进程的连接。[More...](#details)
### Types
* `enum BusType { SessionBus, SystemBus, ActivationBus }`
* `class **[ConnectionCapabilities](index.htm)**`
* `enum ConnectionCapability { UnixFileDescriptorPassing }`
* `enum RegisterOption { ExportAdaptors, ExportScriptableSlots, ExportScriptableSignals, ExportScriptableProperties, ..., ExportChildObjects }`
* `class **[RegisterOptions](index.htm)**`
* `enum UnregisterMode { UnregisterNode, UnregisterTree }`
### Methods
* `__init__ (self, QString name)`
* `__init__ (self, QDBusConnection other)`
* `QDBusPendingCall asyncCall (self, QDBusMessage message, int timeout = -1)`
* `QString baseService (self)`
* `QDBusMessage call (self, QDBusMessage message, QDBus.CallMode mode = QDBus.Block, int timeout = -1)`
* `bool callWithCallback (self, QDBusMessage message, QObject receiver, SLOT() returnMethod, SLOT() errorMethod, int timeout = -1)`
* `object callWithCallback (self, QDBusMessage message, callable returnMethod, callable errorMethod, int timeout = -1)`
* `bool callWithCallback (self, QDBusMessage message, QObject receiver, SLOT() slot, int timeout = -1)`
* `object callWithCallback (self, QDBusMessage message, callable slot, int timeout = -1)`
* `bool connect (self, QString service, QString path, QString interface, QString name, QObject receiver, SLOT() slot)`
* `object connect (self, QString service, QString path, QString interface, QString name, callable slot)`
* `bool connect (self, QString service, QString path, QString interface, QString name, QString signature, QObject receiver, SLOT() slot)`
* `object connect (self, QString service, QString path, QString interface, QString name, QString signature, callable slot)`
* `bool connect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, QObject receiver, SLOT() slot)`
* `object connect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, callable slot)`
* `ConnectionCapabilities connectionCapabilities (self)`
* `bool disconnect (self, QString service, QString path, QString interface, QString name, QObject receiver, SLOT() slot)`
* `object disconnect (self, QString service, QString path, QString interface, QString name, callable slot)`
* `bool disconnect (self, QString service, QString path, QString interface, QString name, QString signature, QObject receiver, SLOT() slot)`
* `object disconnect (self, QString service, QString path, QString interface, QString name, QString signature, callable slot)`
* `bool disconnect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, QObject receiver, SLOT() slot)`
* `object disconnect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, callable slot)`
* `QDBusConnectionInterface interface (self)`
* `bool isConnected (self)`
* `QDBusError lastError (self)`
* `QString name (self)`
* `QObject objectRegisteredAt (self, QString path)`
* `bool registerObject (self, QString path, QObject object, RegisterOptions options = QDBusConnection.ExportAdaptors)`
* `bool registerService (self, QString serviceName)`
* `bool send (self, QDBusMessage message)`
* `unregisterObject (self, QString path, UnregisterMode mode = QDBusConnection.UnregisterNode)`
* `bool unregisterService (self, QString serviceName)`
### Static Methods
* `QDBusConnection connectToBus (BusType type, QString name)`
* `QDBusConnection connectToBus (QString address, QString name)`
* `QDBusConnection connectToPeer (QString address, QString name)`
* `disconnectFromBus (QString name)`
* `disconnectFromPeer (QString name)`
* `QByteArray localMachineId ()`
* `QDBusConnection sender ()`
* `QDBusConnection sessionBus ()`
* `QDBusConnection systemBus ()`
* * *
## Detailed Description
该QDBusConnection类代表到D - Bus总线守护进程的连接。
这个类是在一个D-Bus的会话初始点。使用它,你可以访问远程对象,接口,连接远程信号传送到对象的插槽;注册对象,等等。
使用创建的D-Bus连接的[connectToBus](qdbusconnection.html#connectToBus)( )函数,该函数打开一个到服务器守护程序的连接,并执行初始握手,与相关联的名称连接。进一步尝试使用相同的名称来连接将返回相同的连接。
的连接,然后扯下使用[disconnectFromBus](qdbusconnection.html#disconnectFromBus)()函数。
一旦断开连接,调用[connectToBus](qdbusconnection.html#connectToBus)( )将不会重新建立连接,必须创建一个新的QDBusConnection实例。
为了方便的两个最常见的连接类型,[sessionBus](qdbusconnection.html#sessionBus)()和[systemBus](qdbusconnection.html#systemBus)( )函数返回打开连接到会话服务器守护程序和系统服务器守护程序,分别。这些连接被打开第一次使用时和关闭时的[QCoreApplication](qcoreapplication.html)析构函数被执行。
D-Bus的还支持对等网络连接,而不需要一个总线服务器守护程序。使用这种设备,两个应用程序可以相互交谈并交换信息。这可以通过传递一个地址来实现[connectToBus](qdbusconnection.html#connectToBus)( )函数,它是由另一个D-Bus的应用程序中使用QDBusServer打开。
* * *
## Type Documentation
```
QDBusConnection.BusType
```
指定的总线连接的类型。有效的总线类型包括:
| Constant | Value | Description |
| --- | --- | --- |
| `QDBusConnection.SessionBus` | `0` | 会话总线,与正在运行的桌面会话相关联 |
| `QDBusConnection.SystemBus` | `1` | 系统总线,搭配全系统进程进行通信 |
| `QDBusConnection.ActivationBus` | `2` | 激活总线, “别名”为启动该服务总线 |
在会话总线,可以由共享同一桌面会话(因此得名)同一用户找到其他应用程序。在系统总线,但是,对于整个系统共享流程通常发现。
```
QDBusConnection.ConnectionCapability
```
这个枚举变量描述了一个D-Bus的连接可用的功能。
| Constant | Value | Description |
| --- | --- | --- |
| `QDBusConnection.UnixFileDescriptorPassing` | `0x0001` | 能够通过Unix的文件描述符给其他进程(见[QDBusUnixFileDescriptor](qdbusunixfiledescriptor.html)) |
这个枚举被引入或修改的Qt 4.8 。
该ConnectionCapabilities类型是一个typedef为[QFlags](index.htm)\u003cConnectionCapability\u003e 。它存储ConnectionCapability值的或组合。
**See also** [connectionCapabilities](qdbusconnection.html#connectionCapabilities)( ) 。
```
QDBusConnection.RegisterOption
```
指定与连接对象注册的选项。可能的值有:
| Constant | Value | Description |
| --- | --- | --- |
| `QDBusConnection.ExportAdaptors` | `0x01` | 导出适配器在这个对象中找到的内容 |
| `QDBusConnection.ExportScriptableSlots` | `0x10` | 导出此对象的可编写脚本的插槽 |
| `QDBusConnection.ExportScriptableSignals` | `0x20` | 导出此对象的脚本化的信号 |
| `QDBusConnection.ExportScriptableProperties` | `0x40` | 导出此对象的脚本属性 |
| `QDBusConnection.ExportScriptableInvokables` | `0x80` | 导出此对象的可编写脚本invokables |
| `QDBusConnection.ExportScriptableContents` | `0xf0` | 简写形式ExportScriptableSlots | ExportScriptableSignals | ExportScriptableProperties |
| `QDBusConnection.ExportNonScriptableSlots` | `0x100` | 导出此对象的非脚本化的插槽 |
| `QDBusConnection.ExportNonScriptableSignals` | `0x200` | 导出此对象的非脚本化的信号 |
| `QDBusConnection.ExportNonScriptableProperties` | `0x400` | 导出此对象的非脚本化的属性 |
| `QDBusConnection.ExportNonScriptableInvokables` | `0x800` | 导出此对象的非脚本化的invokables |
| `QDBusConnection.ExportNonScriptableContents` | `0xf00` | 简写形式ExportNonScriptableSlots | ExportNonScriptableSignals | ExportNonScriptableProperties |
| `QDBusConnection.ExportAllSlots` | `ExportScriptableSlots | ExportNonScriptableSlots` | 导出所有该对象的插槽 |
| `QDBusConnection.ExportAllSignals` | `ExportScriptableSignals | ExportNonScriptableSignals` | 导出所有该对象的信号 |
| `QDBusConnection.ExportAllProperties` | `ExportScriptableProperties | ExportNonScriptableProperties` | 导出所有的此对象的属性 |
| `QDBusConnection.ExportAllInvokables` | `ExportScriptableInvokables | ExportNonScriptableInvokables` | 导出所有该对象的invokables |
| `QDBusConnection.ExportAllContents` | `ExportScriptableContents | ExportNonScriptableContents` | 导出所有该对象的内容 |
| `QDBusConnection.ExportChildObjects` | `0x1000` | 导出此对象的子对象 |
该RegisterOptions类型是一个typedef为[QFlags](index.htm)\u003cRegisterOption\u003e 。它存储使用registerOption值的或组合。
**See also** [registerObject](qdbusconnection.html#registerObject)( )[QDBusAbstractAdaptor](qdbusabstractadaptor.html)和[Using adaptors](index.htm)。
```
QDBusConnection.UnregisterMode
```
该模式用于注销一个对象路径:
| Constant | Value | Description |
| --- | --- | --- |
| `QDBusConnection.UnregisterNode` | `0` | 注销这个节点只有:不取消注册子对象 |
| `QDBusConnection.UnregisterTree` | `1` | 注销此节点及其所有子树 |
但是请注意,如果该对象被注册了[ExportChildObjects](qdbusconnection.html#RegisterOption-enum)选项, UnregisterNode将注销子对象了。
* * *
## Method Documentation
```
QDBusConnection.__init__ (self, QString name)
```
创建[QDBusConnection](qdbusconnection.html)附加到名称与连接对象_name_。
这不打开连接。你必须调用[connectToBus](qdbusconnection.html#connectToBus)()将其打开。
```
QDBusConnection.__init__ (self, QDBusConnection other)
```
创建的副本_other_连接。
```
QDBusPendingCall QDBusConnection.asyncCall (self, QDBusMessage message, int timeout = -1)
```
[](qdbuspendingcall.html)
[发送_message_在紧接该连接并返回。此功能适用于方法只调用。它返回类型的对象](qdbuspendingcall.html)[QDBusPendingCall](qdbuspendingcall.html)它可以被用来跟踪应答的状态。
如果没有答复内收到_timeout_毫秒为单位,自动误差将交付指示呼叫期满。默认_timeout_是-1,这将被替换为一个实现定义的值,是适合进程间通信(通常25秒) 。此超时也是在等待QDBusPendingCall.waitForFinished ( )的上限。
请参阅[QDBusInterface.asyncCall](qdbusabstractinterface.html#asyncCall)( )函数用于发出呼叫的一个更友好的方式。
此功能被引入Qt的4.5 。
```
QString QDBusConnection.baseService (self)
```
返回此连接的唯一连接的名称,如果这[QDBusConnection](qdbusconnection.html)对象连接,或空[QString](qstring.html)否则。
唯一的连接名称是一个字符串形式“ : x.xxx ” (其中x是十进制数字) ,是由D-Bus的服务器守护程序在连接时分配。它唯一标识此客户端的总线。
这个函数返回一个空的[QString](qstring.html)为对等连接。
```
QDBusMessage QDBusConnection.call (self, QDBusMessage message, QDBus.CallMode mode = QDBus.Block, int timeout = -1)
```
[](qdbusmessage.html)
[发送_message_在这方面,板块,等待答复,顶多_timeout_毫秒。此功能适用于方法只调用。它返回的应答消息作为它的返回值,这将是两种类型的](qdbusmessage.html)[QDBusMessage.ReplyMessage](qdbusmessage.html#MessageType-enum) or [QDBusMessage.ErrorMessage](qdbusmessage.html#MessageType-enum)。
如果没有答复内收到_timeout_毫秒为单位,自动误差将交付指示呼叫期满。默认_timeout_是-1,这将被替换为一个实现定义的值,是适合进程间通信(通常25秒) 。
请参阅[QDBusInterface.call](qdbusabstractinterface.html#call)( )函数用于发出呼叫的一个更友好的方式。
**Warning:** If _mode_ is [QDBus.BlockWithGui](qdbus.html#CallMode-enum),此功能将重新进入,以等待答复Qt的事件循环。在等待期间,它可能会带来信号和其他方法调用您的应用程序。因此,它必须准备处理重入每当一个呼叫被置于与()的调用。
```
bool QDBusConnection.callWithCallback (self, QDBusMessage message, QObject receiver, SLOT() returnMethod, SLOT() errorMethod, int timeout = -1)
```
发送_message_在紧接该连接并返回。当应答被接收时,该方法_returnMethod_被称为在_receiver_对象。如果发生错误,则该方法_errorMethod_将被调用来代替。
如果没有答复内收到_timeout_毫秒为单位,自动误差将交付指示呼叫期满。默认_timeout_是-1,这将被替换为一个实现定义的值,是适合进程间通信(通常25秒) 。
此功能适用于方法只调用。这是保证的时隙将被调用一次的答复,只要在参数类型匹配,并且不会发生错误。
返回True如果消息被发送,或假,如果无法发送邮件。
```
object QDBusConnection.callWithCallback (self, QDBusMessage message, callable returnMethod, callable errorMethod, int timeout = -1)
```
此功能已被弃用。
这是一个重载函数。
发送_message_在紧接该连接并返回。当应答被接收时,该方法_returnMethod_被称为在_receiver_对象。
此功能适用于方法只调用。这是保证的时隙将被调用一次的答复,只要在参数类型匹配,并且不会发生错误。
这个函数是危险的,因为它不能报告错误,包括超时期满。
返回True如果消息被发送,或假,如果无法发送邮件。
```
bool QDBusConnection.callWithCallback (self, QDBusMessage message, QObject receiver, SLOT() slot, int timeout = -1)
```
```
object QDBusConnection.callWithCallback (self, QDBusMessage message, callable slot, int timeout = -1)
```
```
bool QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, QObject receiver, SLOT() slot)
```
连接由指定的信号_service_,_path_,_interface_和_name_参数到槽_slot_在对象_receiver_。该参数_service_和_path_可以为空,表示到的(任何信号的连接_interface_,_name_)对,从任何远程应用程序。
返回True如果连接成功。
**Warning:**该信号将只被传递到时隙,如果参数匹配。该验证可以做到在接收到信号,只有当,而不是在连接时间。
```
object QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, callable slot)
```
这是一个重载函数。
该信号连接到槽_slot_在对象_receiver_。不同于以往的[connect](qdbusconnection.html#connect)()过载时,此功能允许一个使用指定参数签名要连接的_signature_变量。该函数将验证这个签名可以传送到指定的插槽由_slot_并返回,否则返回False 。
返回True如果连接成功。
**Note:**此功能验证信号的签名相匹配的插槽的参数,但它不会验证与远程服务给定的签名存在的实际信号。
```
bool QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, QString signature, QObject receiver, SLOT() slot)
```
这是一个重载函数。
该信号连接到槽_slot_在对象_receiver_。不同于以往的[connect](qdbusconnection.html#connect)()过载时,此功能允许一个使用指定参数签名要连接的_signature_变量。该函数将验证这个签名可以传送到指定的插槽由_slot_并返回,否则返回False 。
该_argumentMatch_参数列出了要匹配的字符串参数,按顺序。需要注意的是,要匹配一个空字符串,你需要传递一个[QString](qstring.html)那是空的,但不为空(即,[QString](qstring.html)(“” ))。空[QString](qstring.html)跳过该位置匹配。
返回True如果连接成功。
**Note:**此功能验证信号的签名相匹配的插槽的参数,但它不会验证与远程服务给定的签名存在的实际信号。
此功能被引入Qt的4.6 。
```
object QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, QString signature, callable slot)
```
```
bool QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, QObject receiver, SLOT() slot)
```
```
object QDBusConnection.connect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, callable slot)
```
```
ConnectionCapabilities QDBusConnection.connectionCapabilities (self)
```
[](index.htm)
[返回此连接的能力,谈判与总线的服务器或对等。如果这](index.htm)[QDBusConnection](qdbusconnection.html)没有连接,这个函数没有返回的能力。
此功能被引入Qt的4.8 。
```
QDBusConnection QDBusConnection.connectToBus (BusType type, QString name)
```
[](qdbusconnection.html)
[打开型的连接_type_对已知的总线和联营公司与它的连接名称中的一个_name_。返回](qdbusconnection.html)[QDBusConnection](qdbusconnection.html)与该连接相关联的对象。
```
QDBusConnection QDBusConnection.connectToBus (QString address, QString name)
```
[](qdbusconnection.html)
[打开上的地址到私有总线的连接_address_和与它相关联的连接名称_name_。返回](qdbusconnection.html)[QDBusConnection](qdbusconnection.html)与该连接相关联的对象。
```
QDBusConnection QDBusConnection.connectToPeer (QString address, QString name)
```
[](qdbusconnection.html)
[打开上地址的对等连接_address_和与它相关联的连接名称_name_。返回](qdbusconnection.html)[QDBusConnection](qdbusconnection.html)与该连接相关联的对象。
此功能被引入Qt的4.8 。
```
bool QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, QObject receiver, SLOT() slot)
```
断开由指定的信号_service_,_path_,_interface_和_name_从槽参数_slot_在对象_receiver_。作为传递给该参数必须相同[connect](qdbusconnection.html#connect)()函数。
返回True如果断开成功。
```
object QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, callable slot)
```
这是一个重载函数。
断开由指定的信号_service_,_path_,_interface_,_name_和_signature_从槽参数_slot_在对象_receiver_。作为传递给该参数必须相同[connect](qdbusconnection.html#connect)()函数。
返回True如果断开成功。
```
bool QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, QString signature, QObject receiver, SLOT() slot)
```
这是一个重载函数。
断开由指定的信号_service_,_path_,_interface_,_name_,_argumentMatch_和_signature_从槽参数_slot_在对象_receiver_。作为传递给该参数必须相同[connect](qdbusconnection.html#connect)()函数。
返回True如果断开成功。
此功能被引入Qt的4.6 。
```
object QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, QString signature, callable slot)
```
```
bool QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, QObject receiver, SLOT() slot)
```
```
object QDBusConnection.disconnect (self, QString service, QString path, QString interface, QString name, QStringList argumentMatch, QString signature, callable slot)
```
```
QDBusConnection.disconnectFromBus (QString name)
```
关闭的名字总线连接_name_。
需要注意的是,如果仍有[QDBusConnection](qdbusconnection.html)使用相同的连接相关联的对象,该连接不会被关闭,直到所有引用都将被丢弃。但是,可以使用创建没有进一步的引用[QDBusConnection](qdbusconnection.html)构造函数。
```
QDBusConnection.disconnectFromPeer (QString name)
```
关闭的名义对等连接_name_。
需要注意的是,如果仍有[QDBusConnection](qdbusconnection.html)使用相同的连接相关联的对象,该连接不会被关闭,直到所有引用都将被丢弃。但是,可以使用创建没有进一步的引用[QDBusConnection](qdbusconnection.html)构造函数。
此功能被引入Qt的4.8 。
```
QDBusConnectionInterface QDBusConnection.interface (self)
```
[](qdbusconnectioninterface.html)
[返回](qdbusconnectioninterface.html)[QDBusConnectionInterface](qdbusconnectioninterface.html)对象,表示该连接的D-Bus的服务器接口。
```
bool QDBusConnection.isConnected (self)
```
返回True如果[QDBusConnection](qdbusconnection.html)对象连接。
```
QDBusError QDBusConnection.lastError (self)
```
[
返回所发生的这方面的最后一个错误。
](qdbuserror.html)
[该功能提供了低级别的代码。如果你使用](qdbuserror.html)[QDBusInterface.call](qdbusabstractinterface.html#call)( ) ,错误代码是报告它的返回值。
**See also** [QDBusInterface](qdbusinterface.html)和[QDBusMessage](qdbusmessage.html)。
```
QByteArray QDBusConnection.localMachineId ()
```
[
返回已知的D -Bus系统在本地机器的ID 。运行的D-总线的每个节点或主机具有一个唯一的标识符,该标识符可用于从其它主机相区别,如果它们共享资源,如文件系统。
注意,在本地机器ID不保证是整个系统的靴子持久的,所以该标识符不应该被存储在持久性存储器(例如文件系统) 。它是保证只有在此引导会话的生命周期保持不变。
此功能被引入Qt的4.8 。
```
QString QDBusConnection.name (self)
```
](qbytearray.html)
[返回连接名称为这个连接,给出name参数来](qbytearray.html)[connectToBus](qdbusconnection.html#connectToBus)( ) 。
连接名称可以用来唯一标识实际的底层连接到总线。从一个单一的连接制作的复制品总是隐含共享底层的连接,从而将具有相同的连接名称。
相反,两种连接方式具有不同的连接名称将永远既可以连接到不同的总线,或有不同的唯一的名称(如返回的[baseService](qdbusconnection.html#baseService)( ) )的总线上。
此功能被引入Qt的4.5 。
**See also** [connectToBus](qdbusconnection.html#connectToBus)()和[disconnectFromBus](qdbusconnection.html#disconnectFromBus)( ) 。
```
QObject QDBusConnection.objectRegisteredAt (self, QString path)
```
[](qobject.html)
[返回注册到该对象](qobject.html)[registerObject](qdbusconnection.html#registerObject)( )由给定的对象路径_path_。
```
bool QDBusConnection.registerObject (self, QString path, QObject object, RegisterOptions options = QDBusConnection.ExportAdaptors)
```
登记对象_object_在路径_path_如果注册成功则返回True。该_options_参数指定了对象_object_将通过D-Bus的暴露。
此功能不会取代现有的对象:如果有已经在路径注册的对象_path_,这个函数将返回False 。使用[unregisterObject](qdbusconnection.html#unregisterObject)( )先注销它。
你不能注册的对象为已注册的对象的子对象[QDBusConnection.ExportChildObjects](qdbusconnection.html#RegisterOption-enum)。
```
bool QDBusConnection.registerService (self, QString serviceName)
```
尝试注册_serviceName_在D-Bus的服务器上,如果注册成功则返回True 。如果该名称已被其他应用程序的注册将失败。
**See also** [unregisterService](qdbusconnection.html#unregisterService)()和[QDBusConnectionInterface.registerService](qdbusconnectioninterface.html#registerService)( ) 。
```
bool QDBusConnection.send (self, QDBusMessage message)
```
发送_message_在这方面,没有等待答复。本品适用于错误,信号和返回值,以及调用的返回值是没有必要的。
返回True如果消息被排队成功,否则返回False。
```
QDBusConnection QDBusConnection.sender ()
```
[](qdbusconnection.html)
[返回发送的信号的连接,如果在调用通过激活一个时隙](qdbusconnection.html)[QDBus](qdbus.html),否则返回0 。
**Note:**请避免此功能。这个函数不是线程安全的,所以如果有任何其他线程提供一个D-Bus的调用,此函数可能返回错误的连接。在新的代码,请用[QDBusContext.connection](index.htm#connection)( ) (请参阅类关于如何使用它的描述) 。
**Warning:**此功能不[reentrant](index.htm#reentrant)。
```
QDBusConnection QDBusConnection.sessionBus ()
```
[](qdbusconnection.html)
[返回](qdbusconnection.html)[QDBusConnection](qdbusconnection.html)对象打开与会话总线。这个函数返回的对象引用是有效的,直到应用程序终止,在这一点上的连接将被关闭和删除对象。
```
QDBusConnection QDBusConnection.systemBus ()
```
[](qdbusconnection.html)
[返回](qdbusconnection.html)[QDBusConnection](qdbusconnection.html)打开对象与系统总线。这个函数返回的对象引用是有效的,直到[QCoreApplication](qcoreapplication.html)的析构函数被执行,当连接将被关闭和对象,删除。
```
QDBusConnection.unregisterObject (self, QString path, UnregisterMode mode = QDBusConnection.UnregisterNode)
```
注销注册到一个对象[registerObject](qdbusconnection.html#registerObject)( )由给定的对象路径_path_并且,如果_mode_ is [QDBusConnection.UnregisterTree](qdbusconnection.html#UnregisterMode-enum),它的所有子对象了。
请注意,您不能注销了未与登记对象[registerObject](qdbusconnection.html#registerObject)( ) 。
```
bool QDBusConnection.unregisterService (self, QString serviceName)
```
注销服务_serviceName_先前与注册[registerService](qdbusconnection.html#registerService)( ),如果成功则返回True。
**See also** [registerService](qdbusconnection.html#registerService)()和[QDBusConnectionInterface.unregisterService](qdbusconnectioninterface.html#unregisterService)( ) 。
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