What is the correct way to stop this error?
For now I'm merely unchecking "Use Safe Area Layout Guides" which allows me to compile the app without error.
Apple told us in WWDC 2017 Session 412 that Safe Area Layout Guide
is Backwards deployable. But it seems to be not supporting iOS 8.0. I've got the same error on Xcode 9 GM too.
In my case, I stopped using the Safe Area Layout Guide
, but use Top Layout Guide
and Bottom Layout Guide
, even though they are deprecated on iOS 11.