Connection 类

class QMetaObject ::Connection

所有成员列表，包括继承成员

公共函数

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

详细描述

Represents a handle to a signal-slot (or signal-functor) connection.

It can be used to check if the connection is valid and to disconnect it using 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 ( Connection && o )

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

Connection:: Connection (const Connection & other )

Create a copy of the handle to the other connection

Connection:: Connection ()

创建连接实例。

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

移动赋值 other to this object, and returns a reference.

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

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

Connection:: ~Connection ()

析构函数为 QMetaObject::Connection .

`[since 5.15]` void Connection:: swap ( Connection & other )

Swaps this Connection instance with other 。此操作非常快且从不失败。

该函数在 Qt 5.15 引入。

bool Connection:: operator bool () const

返回 true 若连接有效。

The connection is valid if the call to QObject::connect succeeded. The connection is invalid if QObject::connect was not able to find the signal or the slot, or if the arguments do not match.

内容