So this looks a lot like XAML[1] for WPF (Windows Presentation Foundation)[2] to me. and I&#x27;m actually quite surprised that this was not the case for iOS development from the beginning! 
(declaimer: I never touched native iOS development before as a 100% Microsoft technologies professional)<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Extensible_Application_Markup_Language" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Extensible_Application_Markup_...</a>
[2] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Windows_Presentation_Foundation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Windows_Presentation_Foundatio...</a>