Build a Photo Browser iPhone App - Double taps

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.imageView = [[UIImageView alloc] init];

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(like)];
        tap.numberOfTapsRequired = 2;
        [self addGestureRecognizer:tap];


        [self.contentView addSubview:self.imageView];
    }
    return self;
}


//and


-(void)like {

    NSLog(@"Like: %@",self.photo[@"link"]);

    NSURLSession *session = [NSURLSession sharedSession];
    NSString *accessToken = [[NSUserDefaults standardUserDefaults] objectForKey:@"accessToken"];
    NSString *urlstring = [[NSString alloc] initWithFormat:@"https://api.instagram.com/v1/media/%@/likes?access_token=%@",self.photo[@"id"], accessToken];

    NSURL *url = [[NSURL alloc]initWithString:urlstring];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
    request.HTTPMethod = @"POST";
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {

        dispatch_async(dispatch_get_main_queue(), ^{
            [self showLikeCompeletion];
        });

    }];
    [task resume];

}

-(void)showLikeCompeletion {

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Liked!" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil, nil];
    [alert show];

    double delayInSecounds = 1.0;
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSecounds * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [alert dismissWithClickedButtonIndex:0 animated:YES];
    });
}