NSArray *urls = @[@"http://ww4.sinaimg.cn/bmiddle/a15bd3a5jw1f12r9ku6wjj20u00mhn22.jpg",
                  @"http://ww2.sinaimg.cn/bmiddle/a15bd3a5jw1f01hkxyjhej20u00jzacj.jpg"];
NSMutableArray *items = @[].mutableCopy;
for (int i = 0; i < urls.count; i++) {
    // Get the large image url
    NSString *url = [urls[i] stringByReplacingOccurrencesOfString:@"bmiddle" withString:@"large"];
    UIImageView *imageView = _imageViews[i];
    KSPhotoItem *item = [KSPhotoItem itemWithSourceView:imageView imageUrl:[NSURL URLWithString:url]];
    [items addObject:item];
}
KSPhotoBrowser *browser = [KSPhotoBrowser browserWithPhotoItems:items selectedIndex:0];
[browser showFromViewController:self];

NSArray *names = @[@"a.jpg", @"b.jpg"];
NSMutableArray *items = @[].mutableCopy;
for (int i = 0; i < names.count; i++) {
    UIImageView *imageView = _imageViews[i];
    KSPhotoItem *item = [KSPhotoItem itemWithSourceView:imageView image:[UIImage imageNamed:names[i]]];
    [items addObject:item];
}
KSPhotoBrowser *browser = [KSPhotoBrowser browserWithPhotoItems:items selectedIndex:0];
[browser showFromViewController:self];