Connection (Connection && o ) | |
Connection (const Connection & other ) | |
Connection () | |
Connection & | operator= (Connection && other ) |
Connection & | operator= (const Connection & other ) |
~Connection () | |
bool | operator bool () const |
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.
Move-constructs a Connection instance, making it point to the same object that o 所指向的。
Create a copy of the handle to the other connection
创建连接实例。
移动赋值 other to this object, and returns a reference.
赋值 other to this connection and returns a reference to this connection.
析构函数为 QMetaObject::Connection .
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.