ios - How to relate objects which are subclassed from PFObject? -

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i have 2 classes person , address. these 2 classes subclassed pfobject. how can make relation between these classes? below code:

person: @interface person : pfobject<pfsubclassing> @property(strong,nonatomic)nsstring *lastname;  address: @interface address : pfobject<pfsubclassing> @property(strong,nonatomic)person *person; @property(strong,nonatomic)nsstring *lastname;

in address file, have done make relation shows me null value: both of them created singleton because wanted make relations.

address.person.lastname= person.lastname;

please me how make relation. appreciated. thanks.


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