I have one
Is my constraint correct for 35:65 screen.
Instead of giving Aspect ratio you could also give it a multiplier for 35%.
RedView from 3 sides,
RedView and ViewController's main view to Equal height.
RedView's equal height constraint and go to it's attribute inspector. (4th right tab)
Multiplier value to
Now RedView will be always
35% of your main screen in both Orientations.