ios - Is there a code only version of "Size Classes"? -

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I'm writing my iOS 8 constraints in the code instead of IO Oh, for a number of reasons, There is no way to write the constraints of the "sections", as you can do in the IB.

I think I can look for changes in the screen aspect ratio and then reset the obstacles, but is there a more documented way?

Thank you! Henry

check UITraitCollection and UITraitEnvironment . Contains UITviewController to UITraitEnvironment which means that you can hold it at UITraitCollection and when it changes through code, the response is also

> TraitcollectionDidChange:

In the UITraitCollection displayScale and userInterfaceIdiom with horizontal and vertical sizes.

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