A cancelable object that refers to the lifetime of processing a given request.
Citizens in FoundationNetworking
A type with a customized textual representation suitable for debugging purposes.
A type with a customized textual representation.
A type that can be compared for value equality.
A type that can be hashed into a
Hasherto produce an integer hash value.
NSCopyingprotocol declares a method for providing functional copies of an object. The exact meaning of “copy” can vary from class to class, but a copy must be a functionally independent object with values identical to the original at the time the copy was made.
NSObjectProtocolgroups methods that are fundamental to all Foundation objects.
If your class supports reporting progress, then you can adopt the ProgressReporting protocol.