HJ_MWCaption.h

#import <MWPhotoBrowser/MWCaptionView.h>
#import "MWCaptionView.h"

@interface HJ_MWCaption : MWCaptionView {
    MWPhoto *_photo;
}
@property(nonatomic, strong) UIButton * like_button;

HJ_MWCaption.m

@implementation HJ_MWCaption
-(id)initWithPhoto:(MWPhoto *)photo {
    _photo = photo;
    return [super initWithPhoto:photo];
}
- (CGSize)sizeThatFits:(CGSize)size {
    return CGSizeMake(self.bounds.size.width,  100);
}

- (void) likeClicked: (id) sender {
 NSLog(@"LIKE CLICKED");
}

- (void)setupCaption {
    
    
//    self.backgroundColor=[UIColor colorWithRed:255 green:255 blue:255 alpha:0.3];
    
    self.userInteractionEnabled=YES;
    
    
    
}

- (void) layoutSubviews {
    if(_like_button != nil) {
        return;
    }
    _like_button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    _like_button.backgroundColor = [UIColor clearColor];
    [_like_button setTitle:@"btn" forState:UIControlStateNormal];
    _like_button.tag=3;
    
    [self addSubview:_like_button];
    [_like_button addTarget:self action:@selector(likeClicked:) forControlEvents:UIControlEventTouchUpInside];
   
    
}