Connection 类

class QMetaObject ::Connection

所有成员列表，包括继承成员

公共函数

	Connection ()
	Connection (const QMetaObject::Connection & other )
	Connection (QMetaObject::Connection && o )
	~Connection ()
void	swap (QMetaObject::Connection & other )
bool	operator bool () const
QMetaObject::Connection &	operator= (QMetaObject::Connection && other )
QMetaObject::Connection &	operator= (const QMetaObject::Connection & other )

详细描述

表示信号-槽 (或信号函子) 连接的句柄。

它可以用于校验连接是否有效，并断开连接使用 QObject::disconnect (). For a signal-functor connection without a context object, it is the only way to selectively disconnect that connection.

As Connection is just a handle, the underlying signal-slot connection is unaffected when Connection is destroyed or reassigned.

成员函数文档编制

Connection:: Connection ()

创建连接实例。

Connection:: Connection (const QMetaObject::Connection & other )

Create a copy of the handle to the other connection

`[noexcept]` Connection:: Connection ( QMetaObject::Connection && o )

Move-constructs a Connection instance, making it point to the same object that o 所指向的。

`[noexcept]` Connection:: ~Connection ()

析构函数为 QMetaObject::Connection .

`[noexcept]` void Connection:: swap ( QMetaObject::Connection & other )

交换此连接实例与 other 。此操作非常快且从不失败。

bool Connection:: operator bool () const

返回 true 若连接有效。

连接有效若调用 QObject::connect 成功。连接无效若 QObject::connect was not able to find the signal or the slot, or if the arguments do not match.

`[noexcept]` QMetaObject::Connection &Connection:: operator= ( QMetaObject::Connection && other )

移动赋值 other 到此对象，并返回引用。

QMetaObject::Connection &Connection:: operator= (const QMetaObject::Connection & other )

赋值 other to this connection and returns a reference to this connection.