UIButton+IndexPath

UIButton+IndexPath.h

#import <UIKit/UIKit.h>

@interface UIButton (IndexPath)

@property (strong, nonatomic) NSIndexPath * indexPath;

@end

UIButton+IndexPath.m

#import "UIButton+IndexPath.h"
#import <objc/runtime.h>

static char MyCustomPropertyKey = 0;

@implementation UIButton (IndexPath)

@dynamic indexPath;

- (NSIndexPath *)indexPath
{
    return objc_getAssociatedObject(self, &MyCustomPropertyKey);
}

- (void)setIndexPath:(NSIndexPath *)indexPath
{
    objc_setAssociatedObject(self, &MyCustomPropertyKey, indexPath, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

@end