objective c - How to set value of a property that's a custom object -


i'm trying keep track of sprite user has dragged/dropped on top of "rectangle" objects. thought easiest thing add property of same type "mysprite" "rectangle" objects , set it's value equal "mysprite" that's been dropped on top of it. thought using property "mysprite *sprite" in "rectangle.h" file along synthesizing in "retangle.m" file have automatically created "setsprite" method. i'm not understanding something....

the "target.sprite = selsprite;" line of code below in cocosscene.m causes following error:

2013-05-14 20:32:51.953 dragdrop[461:c07] * terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[ccsprite setsprite:]: **unrecognized selector sent instance 0x8d5c280'

rectangle.h

#import "ccnode.h" #import "cocos2d.h" #import "mysprite.h"  @interface rectangle : ccnode {     mysprite *sprite; }  @property(nonatomic,readwrite,copy) mysprite *sprite;  @end

rectangle.m

@implementation rectangle  @synthesize sprite = _sprite;  @end

cocosscene.m

for(rectangle *target in wordcirclerectangles)             {                  if(cgrectintersectsrect(selsprite.boundingbox, target.boundingbox))                 {                     target.sprite = selsprite;                 }             }


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