valid
A Boolean value that indicates whether the receiver is known to be valid.
Declaration
@property (readonly, getter=isValid) BOOL valid;Discussion
true if the receiver is known to be valid, otherwise false.
An NSConnection object becomes invalid when either of its ports becomes invalid, but only notes that it has become invalid when it tries to send or receive a message. When this happens it posts an NSConnectionDidDieNotification to the default notification center.