Adding properties to an objective-C category-Revisted

Http://www.davidhamrick.com/2012/05/28/Adding-Properties-to-an-Objective-C-Category-Revisted.html

In my last post I wrote about adding properties to a category
In objective-C. I have ended up using this feature quite a bit recently so I wrote a macro that will add the appropriate methods.

Before, when I wanted to add a Category I wocould have to manually add the setter and getter.

 Static   Char   Kdhstylekey  ;  @ Interface  Uiview   (Dhstylemanager)  @ Property   (  Nonatomic  ,   Copy  )   Nsstring  *   Stylename  ;  @ End  @ Implementation   Uiview   (Dhstylemanager) @ Dynamic   Stylename  ;  -   (  Void  )  Setstylename:  (  Nsstring   *  )  Stylename  {  Objc_setassociatedobject  (  Self  ,  &  Kdhstylekey  ,   Stylename  ,   Objc_association_copy  );  }  -   (  Nsstring  *  )  Stylename  {  Return   Objc_getassociatedobject  (  Self ,   &  Kdhstylekey  );  }  @ End 

Now, all I need to do is use the macro to create the getters and setters.

 @ Interface   Uiview   (Dhstylemanager)  @ Property   (  Nonatomic  ,  Copy  )   Nsstring  *   Stylename  ;  @ End  @ Implementation   Uiview   (Dhstylemanager)  Add_dynamic_property  (  Nsstring  *  ,  Stylename  , Setstylename  );  @ End 

All you need to do to use this macro is put this in a header file.

 # Define add_dynamic_property (property_type, property_name, setter_name )\  @ Dynamic property_name ;\  Static char kproperty # property_name ;\  -(Property_type) property_name \  {\ Return (property_type) objc_getassociatedobject (self, & (kproperty # property_name ));\  }\  \  -(Void) setter_name property_type) property_name \  {\  Objc_setassociatedobject (self, & kproperty # property_name, property_name, objc_association_retain );\  }\