Autolayout and Device Orientation

Question

I am developing an application which supports portrait and landscape modes. I am using auto layout to arrange my views. As i have been reading many

Answer 1

for ios8+

From the documentation for:

- (void)willTransitionToTraitCollection:(UITraitCollection *)newCollection
          withTransitionCoordinator:(id)coordinator

A standard view controller might use this method to change the constraints on the views it manages.