app icon for retina device

My app's icon is named:

appicon57x57.png

This works great on simulat开发者_StackOverflow社区or and device. I don't have a retina device to test on. But if I make a 114x114 version of my app icon and call it:

appicon57x57@2x.png

and put in in the same place as the other icon, will it show on the retina devices?

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As long as your Info.plist lists the app icon name as appicon57x57 (as it should since you say it works), and you make sure to add the appicon57x57@2x version to your project (and its build target), then yes, Retina Display devices should detect the appicon57x57@2x version and load that one.