title: margins for ios app icons
body: <p>I have an icon for my iOS app that seems to be missing some margins that other icons have. This creates an irregular, unwanted border around the icon when it is selected in Springboard (as the darkened selection overlay is smaller than the actual icon), as visible in this image:</p>
  
  <p><img src="https://i.stack.imgur.com/qhmPu.png" alt="When selected, missing margins create a irregular, unwanted border around the icon"></p>
  
  <p>When another app is selected (Safari, for example), there is no extra border:
  <img src="https://i.stack.imgur.com/tkMDL.png" alt="When another icon is selected, there is no extra border"></p>
  
  <p>I've tried this out with "Prerendered" setting (in the Xcode Target Summary page) on and off with no visible difference. I've also noticed other apps icons that have this issue. When I look at the icon for an app that doesn't have this issue, I do notice margins of a few pixels on every side.</p>
  
  <p>I couldn't find any values listed online for the margins of different icon sizes. Does someone happen to know the values for the margins, or a program that can create the images with the correct margins? Or is there something else I may be missing?</p>
  
  <p>(Note that the icons are not parallel due to the wiggling icons do in the app-deletion mode of Springboard. The 72@2x visible on the icon is--I assume--a <a href="https://stackoverflow.com/q/17703916/381233">separate issue</a>.)</p>
  
  <p>UPDATE: I myself have verified this on both a iPod Touch 4 (iOS 5) and iPhone 4 (iOS 6). (If it matters, both devices are jailbroken.) The project contains the following icons: Icon (57x57), Icon@2x (114x114), Icon-72 (72x72) and Icon-72@2x (144x144).</p>
  
  <p>UPDATE 2: Since I'm developing an app for Cydia, the automatic icon rounding done by Springboard for regular App Store apps doesn't seem to be a possibility (see comments in <a href="https://stackoverflow.com/a/17730137/381233">@Vojtech Vrbka's answer</a>).</p>
  
  <p>UPDATE 3: Posted my solution to this problem (also removed the linked question in the last paragraph before the updates).</p>