When programming and looking at all different apps I have realized that some apps in the app store don't have the lit highlight on the top, making it look more 3D. I have an app idea but I need to take the highlight off. The app have been programmed in Xcode, so if anyone answers, that would be great. Thanks!
If you choose, you can prevent iPhone OS from adding the shine to your icon. To do this, you need to add the UIPrerenderedIcon key to your application’s Info.plist file (read “The Information Property List” in iPhone Application Programming Guide to learn about this file). Your icon should still measure 57 x 57 pixels, regardless of whether you take advantage of the added shine.
来源：https://stackoverflow.com/questions/1215637/taking-the-highlight-off-of-icons