UIScrollView category to add images using auto layout (visual format) to handle contentSize automatically

UIScrollView+Images.m

#import "UIScrollView+Images.h"

@implementation UIScrollView (Images)

- (void)addImages:(NSArray *)images
{
    NSMutableDictionary *viewsDictionary = [NSMutableDictionary dictionary];
    NSMutableString *visualFormatString = [NSMutableString stringWithString:@"|"];
    NSUInteger index = 0;
    for (UIImage *anImage in images) {
        UIImageView *imageView = [[UIImageView alloc] initWithImage:anImage];
        [self addSubview:imageView];
        imageView.translatesAutoresizingMaskIntoConstraints = NO;

        NSString *key = [NSString stringWithFormat:@"imageView%d", index];
        [visualFormatString appendFormat:@"[%@]", key];
        
        [viewsDictionary setObject:imageView forKey:key];
        index++;
    }
    [visualFormatString appendString:@"|"];
    [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:visualFormatString options:0 metrics:nil views:viewsDictionary]];
}

@end