Changing interfaceOrientation based on image dimensions

Question

I'm looking to change the phone's rotation based on the size of an image. is there a way to detect if the image has 480px x 300px dimensions then use landscape rotation and vice versa?

I have many photos some of which are best view landscape and other best viewed in portrait mode.

thanks for any help.

Answer 1

Think hard about whether you want to rotate the whole UIView that the image is on, versus just doing a rotation transform on the image, so it's turned 90 degrees inside a view that's still portrait mode. When I came up against this issue myself recently, I chose the latter. The whole rest of my app is locked in portrait mode, and to have this one view re-orient its whole thing to be landscape was just weird. Instead I float the image out in a UIView up on top of everything else, and rotate it if that's the best-fit orientation of the image.