Q:

Does Xcode 6 now give views a margin of 16 points?

For some reason in Xcode 6 when pin a view to 0 top, bottom, left, and right it gives it a left and right margin of 16 points. 
Is this a new Feature?
I cannot figure out how to fix it without setting the margins to -16
Here are some screenshots.

A:

When you add an Auto Layout constraint in Interface Builder, there's a check box under the box model at the top that says "Relative to Margin" (or something similar). It's checked by default, but if you uncheck it while adding the constraints, the constraints will be relative to the Superview bounds instead of it's margins, as you expect.
I'd give you a screen shot, but I'm not at my Mac right now. :)

A:

You need to uncheck the following on interface builder:
 

