Connection () | |
Connection (const QMetaObject::Connection & other ) | |
Connection (QMetaObject::Connection && o ) | |
~Connection () | |
void | swap (QMetaObject::Connection & other ) |
bool | operator bool () const |
QMetaObject::Connection & | operator= (const QMetaObject::Connection & other ) |
QMetaObject::Connection & | operator= (QMetaObject::Connection && other ) |
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.
创建连接实例。
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
)
Swaps this Connection instance with other 。此操作非常快且从不失败。
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.
赋值 other to this connection and returns a reference to this connection.
[noexcept]
QMetaObject::Connection
&Connection::
operator=
(
QMetaObject::Connection
&&
other
)
移动赋值 other to this object, and returns a reference.