title: Should the dimensions (height/width) of the retina images (@2X) always be multiples of two?
body: <p>I've gotten some graphics files for buttons etc. from the designer. Most of the retina files have one or both dimensions odd, like 29 x 30 or 79 x 61, and then the dimensions of the corresponding non-retina files will be 15 x 15 or 39 x 31, for example. The dimensions of the <code>UIImageView</code> s that hold each image exactly match the size of the non-retina files they hold, so on a non-retina phone there is no distortion and everything looks fine.</p>
  
  <p>On a retina phone, these images (icons and such) only look fine when the images happen to be even dimensions (like 30 x 30 or 46 x 80); when there's an odd dimension to the image, it gets distorted slightly.</p>
  
  <p>Should the pixel dimensions of a retina image always be twice the size of the non-retina dimensions, and of the dimensions of the frame that displays it?</p>