SafeArea Question about pinlayout

[lucdion]

Interesting case @Michael-Davies, I will investigate that.

[antoinelamy]

One thing is for sure, UIViewController is not designed for it's managing view to be swapped at runtime like that. Internally, UIViewController register as a private delegate to it's view shortly after loadView to receive callbacks about it's lifecycle events such as viewDidLayoutSubviews. By swapping the view itself, the view controller do not get called anymore when it's view layout is performed. Safe areas for older iOS versions than iOS 11 get computed in viewDidLayoutSubviews so I assume it is normal that you don't get the correct safeArea for your newly created view.

The way to go would be to replace a subview of your view controller's view instead of the root view itself and calling view.setNeedsLayout() when that occur, that should fix your problem.

[lucdion]

Thanks @antoinelamy for the answer, there is no real overhead of adding subviews and its much cleaner and respect the purpose of the UIViewController.loadView() method.