1 #import <UIKit/UIKit.h> 2 #import <objc/runtime.h> 3  4 typedef void (^ActionBlock)(); 5  6 @interface UIButton (Block) 7  8 /** 9  *  UIButton添加UIControlEvents事件的block10  *11  *  @param event 事件12  *  @param action block代碼13  */14 - (void) handleControlEvent:(UIControlEvents)event withBlock:(ActionBlock)action;15 16 @end

 1 #import "UIButton+Block.h" 2  3 @implementation UIButton (Block) 4  5 static char eventKey; 6  7 /** 8  *  UIButton添加UIControlEvents事件的block 9  *10  *  @param controlEvent 事件11  *  @param action block代碼12  */13 - (void) handleControlEvent:(UIControlEvents)event withBlock:(void (^)())action {14     objc_setAssociatedObject(self, &eventKey, action, OBJC_ASSOCIATION_COPY_NONATOMIC);15     [self addTarget:self action:@selector(callActionBlock:) forControlEvents:event];16 }17 18 - (void)callActionBlock:(id)sender {19     ActionBlock block = (ActionBlock)objc_getAssociatedObject(self, &eventKey);20     if (block) {21         block();22     }23 }24 25 @end

1 - (void)viewDidLoad {2     [super viewDidLoad];3     // Do any additional setup after loading the view, typically from a nib.4     5     [self.button handleControlEvent:UIControlEventTouchUpInside withBlock:^{6        7         NSLog(@"button touched!");8     }];9 }