iOS has always been able to do fluid layouts. It was possible with Springs and Struts (though a PITA), and from iOS 6 onwards has Auto Layout, which I personally find better (more declarative) than Android's box model.
I can open up an Android layout file and almost instantly understand how it works and what I have to do to change it.
Since discovering it I've fallen in love with Autolayout and its abilities — where I used to dislike it before.
It's a bit like imperative vs. functional programming. In the former model, I have an idea in my head and I need to nest containers step by step to get to the final form. In the latter I'm simply building up a ruleset.
But like I said, that was my personal preference. I guess we'll have to differ on opinions ;)