category 给IOS原生类添加属性

UIButton+kuozhanButton.h

#import <UIKit/UIKit.h>

@interface UIButton (kuozhanButton)

@property (nonatomic, retain) id objInfo;

@end

UIButton+kuozhanButton.m

#import "UIButton+kuozhanButton.h"

#import <objc/runtime.h>

@implementation UIButton (kuozhanButton)

- (void)setObjInfo:(id)newObj

{

    objc_setAssociatedObject(self, @"objInfo", newObj, OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

- (id)objInfo

{

    return objc_getAssociatedObject(self, @"objInfo");

}

@end