title: UIImageView aspect fill and zoom to top
body: <p>I have a UIScrollView which has width>height aspect ratio. However when I use aspect fill as the content mode it fills to the image center, and if the image shown has a portrait aspect ratio(for example if its a profile photo a person) the heads of people are not shown, and thats bad UX. </p>
  
  <p>I wonder if there is a way to aspect fill into the top of the image. UIImage also has a face detection mechanism as far as I know but I don't know how to use it.</p>
  
  <p>Thanks</p>