I'd like to have a callback when the user has taken a screenshot from my game. After reading posts on the web, it seems that it is not possible with iOs 5. (as mentioned here)
So basically I thought I could check every second if an image has been aded to the photo album, then calculate something like its average tone (+ highest color, + lowest color), and then compare it to the screen view of my game.
DO you think it is the best way to do ? Will Apple block my game if they find out I use this ?