By default, UIImageView displays his image as 1px of image = 1pt in UIImageView, but I'd like to display as 2px of image = 1pt.

Version of saving image with name "..@2x.." is not suitable, images are not saving in file system.

For example, image size is 400x100, I want to display the image on center of display, and it should be 120 pt on the left and 120 pt on the right of the image(640-400) / 2