How to programmatically resize elements for landscape vs portrait in your iphone interface

In a view controller, it's a bit harder to programmatically resize your UI elements, so that eg in landscape things are radically rearranged, and anything that can't be handled by the normal anchoring configurations.

If you subclass your view, it's easy: simply put the code in your 'layoutSubviews' method. But usually you don't have that, rather you've got your view controller class. Well the answer is to make a single method that does your resizing, and call it from three places, to ensure that it always gets called, otherwise you'll get strange edge cases where it doesn't get called. So put code like the following in your view controller: