Commands Acorn to export an iOS app icon in all useful sizes for iOS 6 and iOS 7. As written, this script assumes there is a square image named icon.acorn on my desktop, and writes the output files to the desktop. Flattening is performed inside the loop because it did not work when I put it outside. No changes are made to the original file, alth…

App icons.jstalk

var sizes = [29, 40, 50, 57, 58, 72, 76, 80, 100, 114, 120, 144, 152, 1024];

var acorn = JSTalk.application("Acorn");
var doc = acorn.open("/Users/Douglas/Desktop/icon.acorn");

for (idx = 0; idx < sizes.length; idx++) {
    doc.flattenImage();
    doc.scaleImageToWidth(sizes[idx]);
    doc.dataRepresentationOfType("public.png").writeToFile("/Users/Douglas/Desktop/icon-" + sizes[idx] + ".png");
    doc.undo();
}

doc.close();

pst:
doc.flattenImage(nil);
that should be more reliable, even though it's a private api.