ricky c0be871812 [ASViewController] Propagate the traits on willTransitionToTraitCollection (#2115) ...

Previously we were only propagating the trait collection on `viewWillTransitionToSize` since it is called shortly after `willTransitionToTraitCollection`. However, some important things can happen in that time “shortly after” (like collection view layout). As long as nothing changes from `willTransitionToTraitCollection` to `viewWillTransitionToSize` (which it shouldn’t) the traits will not be re-propagated anyhow.

Also make sure to use the `ASEnvironmentTraitCollectionMakeDefault` method when creating new envTraitCollection so the struct isn’t filled with junk.

2016-08-22 10:06:53 -07:00

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