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I am designing an icon for use with an Xcode template and need to know what display-resolution and pixel-density settings I need to use for each of the PNG files I'm exporting from GIMP into my .iconset folder. Specifically, what display resolutions and pixel densities should I use for the [email protected], icon_512x512.png, [email protected], icon_256x256.png, [email protected], icon_128x128.png, [email protected], icon_64x64.png, icon_32x32@2x, icon_32x32.png, [email protected], and icon_16x16.png images in my icon set?

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Use the resolution given in the name of the image. For @2x images, double the resolution in both directions. PPI does not matter—Apple uses 72 PPI. Do not use any transparency or interlacing.

For example: [email protected] is a 1024x1024 image.

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  • OK, thanks! I thought that the resolution given in the name that you're supposed to use for each of your icon resources might be significant, but I wasn't sure if the @2x part meant double the resolution or double the pixel density.
    – RandomDSdevel
    Commented Nov 16, 2014 at 16:12

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