@toohotz Thank your for Gread PR!
I will merge it if PureLayout#203 discussion is closed.

No problem 👍🏾, you might want the changes for yourself as well as it fixes the things with the trailing and bottom to superview along with the inequalities and other methods as well. The maintainer of the repo seems like he is going to reach out for some others to help keep things alive but I'll drop a note there referring to this PR as well.

Hey there, are you going to integrate these changes into your fork?

@toohotz
Hey, I'm back. I will merge your PR in day or two. Thanks!

Thanks!

Hey guys, I found your approach using NSLayoutAnchor is great, some how I found that there is some compatibility problem if targeting iOS 8.0, the NSLayoutAnchor is only available in iOS 9.0, so if I run the app in iOS 8 (pretty old system), it will cause crash. Although PureLayout do claim that fully compatible with iOS 9.0 but at least it won't crash even if it target the iOS 8.0.
Should we use the primitive API instead of higher level API until the project should no longer support such low version system ? Or whenever higher API available, we can make use of the higher level API.

@jjksam Agreed, NSLayoutAnchor was introduced in iOS 9 so we should restrict this API to target iOS 9 and forward. Since the iPhone X is the first device that utilizes safe area insets and it started life on iOS 11, it should pose no issues. This will be done on the PR on the PureLayout project.