UIButton Origin and Device Orientation

I have a view controller that is set to auto rotate to orientation. Inside I've got two subviews. One is a uibutton. All I want is for my button's origin to stay locked to the bottom-left in portrait and bottom-right in landscape (so it basically stays in the same place).

It should also stay in place for portrait upsi开发者_如何学Gode down and landscape right.

Any ideas?

Use autoresizing.