ProtocolFoundation5.9.0
ProgressReporting
If your class supports reporting progress, then you can adopt the ProgressReporting protocol.
protocol ProgressReporting : NSObjectProtocolObjects that adopt this protocol should typically be “one-shot” – that is, the progress is setup at initialization of the object and is updated when work is done. The value of the property should not be set to another progress object. Instead, the user of the ProgressReporting class should create a new instance to represent a new set of work.
Supertypes
protocol NSObjectProtocolThe
NSObjectProtocolgroups methods that are fundamental to all Foundation objects.