ios - Add deprecation to a Core Data object or attributes -

we making big change our core data model. there couple of attributes don't want use anymore. example, following values someobject.

however, don't want remove values our core data yet because using everywhere in our project.

i wondering whether possible add deprecation tag of attributes in core data, warning whenever use them.

@interface someobject : _someobject // ...  @end  @interface _someobject : nsmanagedobject {} @property (nonatomic, strong) nsnumber* values; // , massive amount of auto-generated code core data @end 

and saw post how flag method deprecated in objective c. , tried adding deprecation tag inside _someobject.h such as:

@interface _someobject : nsmanagedobject {} @property (nonatomic, strong) nsnumber* values __attribute__((deprecated)); // , massive amount of auto-generated code core data @end 

and works way want have 'values' deprecated warnings on place. able focus on these warnings , fix of them before our next ship. 1 thing don't feel quite comfortable modifying auto generated code core data.

so finally, question is:

is possible add deprecation methods without touching _someobject.h file?

not directly generate compiler warnings; manually modifying interface file correct way that. you're not introducing problems beyond potentially regenerating file , losing attribute.

a possibly preferable rounabout alternative rename properties, e.g. valuesdeprecated. keep canonical name values appropriate migration. write category on _someobject deprecated property values , implement use valuesdeprecated storage.

then existing code should warnings , new code can avoid warnings using property word 'deprecated' in it. author need deliberately careless.