ios - Swift: How can I change the location of Views programmatically? -

i want have views in exact places, , constraints aren't working me. how can place, say, collectionview in lower 80% of screen, , imageview in top 20%?

in case matters, planning app work ipads in landscape view.

you can use nslayoutconstraints, not take long familiar system. way can customize views ease. bigger applications made without storyboards. tutorial http://makeapppie.com/2014/07/26/the-swift-swift-tutorial-how-to-use-uiviews-with-auto-layout-programmatically/