Respond to button events with blocks

UIBarButtonItem+ETBlockActions.h

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (ETBlockActions)

- (id) initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style eventHandler:(void(^)(void))handler;

@end

UIBarButtonItem+ETBlockActions.m

#import "UIBarButtonItem+ETBlockActions.h"
#import <objc/runtime.h>

@implementation UIBarButtonItem (ETBlockActions)

- (id) initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style eventHandler:(void(^)(void))handler {
    class_addMethod([self class], @selector(eventHandler), imp_implementationWithBlock((__bridge void *)(handler)), "v@:");
    
    return [self initWithTitle:title style:style target:self action:@selector(eventHandler)];
}

@end

UIBarButtonItemETBlockActions.h

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (ETBlockActions)

- (id) initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style eventHandler:(void(^)(void))handler;

@end

UIBarButtonItemETBlockActions.m

#import "UIBarButtonItem+ETBlockActions.h"
#import <objc/runtime.h>

@implementation UIBarButtonItem (ETBlockActions)

- (id) initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style eventHandler:(void(^)(void))handler {
    class_addMethod([self class], @selector(eventHandler), imp_implementationWithBlock(handler), "v@:");
    
    return [self initWithTitle:title style:style target:self action:@selector(eventHandler)];
}

@end

UIControl+ETBlockActions.h

#import <UIKit/UIKit.h>

@interface UIControl (ETBlockActions)

- (void) addEventHandler:(void(^)(void))handler forControlEvents:(UIControlEvents)controlEvents;

@end

UIControl+ETBlockActions.m

#import "UIControl+ETBlockActions.h"
#import <objc/runtime.h>

@implementation UIControl (ETBlockActions)

- (void) addEventHandler:(void(^)(void))handler forControlEvents:(UIControlEvents)controlEvents {
    class_addMethod([self class], @selector(eventHandler), imp_implementationWithBlock((__bridge void *)(handler)), "v@:");
    
    [self addTarget:self action:@selector(eventHandler) forControlEvents:controlEvents];
}

@end

UIControlETBlockActions.h

#import <UIKit/UIKit.h>

@interface UIControl (ETBlockActions)

- (void) addEventHandler:(void(^)(void))handler forControlEvents:(UIControlEvents)controlEvents;

@end

UIControlETBlockActions.m

#import "UIControl+ETBlockActions.h"
#import <objc/runtime.h>

@implementation UIControl (ETBlockActions)

- (void) addEventHandler:(void(^)(void))handler forControlEvents:(UIControlEvents)controlEvents {
    class_addMethod([self class], @selector(eventHandler), imp_implementationWithBlock(handler), "v@:");
    
    [self addTarget:self action:@selector(eventHandler) forControlEvents:controlEvents];
}

@end