Can I use autolayout to provide different constraints for landscape and portrait orientations?

Question

Is it possible to change the constraints when the device is rotated? How might this be achieved?

A simple example might be two images which, in portrait, are stacked

Answer 1

You can save your constraints, to a property or variable as portrait and landscape versions then set and remove them on rotate.

I have done this making my constraints in xib for initial view, assigning them to outlets in the view controller. On rotate I create the alternate restraints, remove the outlets but retain them, insert the alternates.

Reverse the process on rotate back.