one-off Adobe Illustrator script to export a document with one artboard to iOS app icons

icons.jsx

var originalDocumentSize = 1024

var folder = Folder.selectDialog();

var document = app.activeDocument;
document.artboards.setActiveArtboardIndex(0);

if (document && document.artboards[0]) {	
    // Icons for Universal Apps; https://developer.apple.com/library/content/qa/qa1686/_index.html
    scaleArtboardAndSave((512 / originalDocumentSize) * 100);
    scaleArtboardAndSave((1024 / originalDocumentSize) * 100);
    scaleArtboardAndSave((120 / originalDocumentSize) * 100);
    scaleArtboardAndSave((180 / originalDocumentSize) * 100);
    scaleArtboardAndSave((76 / originalDocumentSize) * 100);
    scaleArtboardAndSave((152 / originalDocumentSize) * 100);
    scaleArtboardAndSave((167 / originalDocumentSize) * 100);
    scaleArtboardAndSave((20 / originalDocumentSize) * 100);
    scaleArtboardAndSave((40 / originalDocumentSize) * 100);
    scaleArtboardAndSave((60 / originalDocumentSize) * 100);
    scaleArtboardAndSave((80 / originalDocumentSize) * 100);
    scaleArtboardAndSave((120 / originalDocumentSize) * 100);
    scaleArtboardAndSave((29 / originalDocumentSize) * 100);
    scaleArtboardAndSave((58 / originalDocumentSize) * 100);
    scaleArtboardAndSave((87 / originalDocumentSize) * 100);
}

function scaleArtboardAndSave(scaleTo) {
    var cwd = new Folder(folder.absoluteURI + "/");
    var sizeInPixels = scaleTo / 100 * originalDocumentSize;
    var fileName = "icon-" + sizeInPixels + ".png";
    var file = new File(cwd.fsName + "/" + "icon-" + sizeInPixels + ".png");

    // http://cssdk.s3-website-us-east-1.amazonaws.com/sdk/1.0/docs/WebHelp/references/csawlib/com/adobe/illustrator/ColorDitherMethod.html
    var options = new ExportOptionsPNG24();
    options.antiAliasing = true;
    options.artBoardClipping = true;
    options.verticalScale = scaleTo;
    options.horizontalScale = scaleTo;

    document.exportFile(file, ExportType.PNG24, options);
}