Array of Images display in UIScrollview and zooming successfully but cannot go next image

#define IMAGE_WIDTH 320
#define IMAGE_HEIGHT 540

- (void)viewDidLoad
{
    
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    
    NSArray *photos = [[NSArray arrayWithObjects:
                        [UIImage imageNamed:@"1.png"],
                        [UIImage imageNamed:@"2.png"],
                        [UIImage imageNamed:@"3.png"],
                        [UIImage imageNamed:@"4.png"],
                        nil] retain];
    // note that the view contains a UIScrollView in aScrollView
    int i = 0;
    //UIScrollView *scrollView = nil;
    for ( NSString *image in photos )
    {
        NSLog(@"image: %@",image);
        UIImage *images = [photos objectAtIndex:i];
        imageView = [[UIImageView alloc] initWithImage:images];
        imageView.contentMode = UIViewContentModeScaleAspectFit;
        imageView.clipsToBounds = YES;
        imageView.tag = 1;

        UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake( IMAGE_WIDTH * i++, 0, IMAGE_WIDTH, IMAGE_HEIGHT)];
        scrollView.delegate = self;
        scrollView.maximumZoomScale = 3.0f;
        imageView.frame = scrollView.bounds;
        [scrollView addSubview:imageView];
        [imageView release];
        NSLog(@"imageview: %@",imageView);
        [self.scrollViewimages addSubview:scrollView];
    }

}


- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    return [scrollView viewWithTag:1];
}