TransformIgnoringSafeAreaInsetsView.swift

// This view overrides safeAreaInsets in order to work around
// (possibly erroneous) behavior of UIKit where safe area insets change
// when a view is transformed. (see http://www.openradar.me/35532074)
//
// Use this view as the direct subview of the view that has the transform applied.
// This view's frame should be equal to the superview's bounds for this to work.
@objc public class TransformIgnoringSafeAreaInsetsView: UIView {
    @available(iOS 11.0, *)
    override public var safeAreaInsets: UIEdgeInsets {
        guard let superview = self.superview, superview.transform != .identity else {
            return super.safeAreaInsets
        }
        
        // we make a lot of assumptions and test one of them here
        assert(self.frame == superview.bounds)
        
        return superview.safeAreaInsets
    }
}