iOS 11 safe area layout guide backwards compatibility

Question

Is enabling Safe Area Layout Guides compatible to iOS below 11?

Answer 1

Swift 5

I just do this. It is simple and very close to the real thing (just added an 'r').

extension UIView {
    var saferAreaLayoutGuide: UILayoutGuide {
        get {
            if #available(iOS 11.0, *) {
                return self.safeAreaLayoutGuide
            } else {
                return self.layoutMarginsGuide
            }
        }
    }
}

Use like this:

button.topAnchor.constraint(equalTo: view.saferAreaLayoutGuide.topAnchor, constant: 16)