UIButton+HN.m

//
//  UIButton+HN.m
//  HNCategories
//
// This is under The MIT License
//
// Copyright © 2013 Josh Ha-Nyung Chung <minorblend@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//

#import "UIButton+HN.h"

#import <objc/runtime.h>

static char buttonActionBlockKey;

@implementation UIButton (HN)

- (void)runBlock {
  void (^block)(void) = objc_getAssociatedObject(self, &buttonActionBlockKey);
  if (block)
    block();
}

- (void)addBlock:(void (^)(void))block forControlEvents:(UIControlEvents)controlEvents {
  objc_setAssociatedObject(self, &buttonActionBlockKey, block, OBJC_ASSOCIATION_COPY);
  [self addTarget:self action:@selector(runBlock) forControlEvents:controlEvents];
}

@end