Connection 類

class QMetaObject ::Connection

所有成員列錶，包括繼承成員

公共函數

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

詳細描述

錶示信號-槽 (或信號函子) 連接的句柄。

它可以用於校驗連接是否有效，並斷開連接使用 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.

成員函數文檔編製

Connection:: Connection ( Connection && o )

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

Connection:: Connection (const Connection & other )

Create a copy of the handle to the other connection

Connection:: Connection ()

創建連接實例。

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

移動賦值 other 到此對象，並返迴引用。

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

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

Connection:: ~Connection ()

析構函數為 QMetaObject::Connection .

bool Connection:: operator bool () const

返迴 true 若連接有效。

連接有效若調用 QObject::connect 成功。連接無效若 QObject::connect was not able to find the signal or the slot, or if the arguments do not match.