Вы можете попробовать этот метод обратного вызова
self.moviePosterImageView.sd_setImage(with:Url,
placeholderImage: #imageLiteral(resourceName: "PImage"),
options: [],
completed: { (image, error,cacheType, url) in
// here image is the UIImage
self.moviePosterImageView.image = image?.roundedWithBorder(width: 2, color: .red)
})