Adobe Illustrator script to generate PNG icons for apps.

iconizer.jsx

/***
Adobe Illustrator script to generate PNG icons for apps.
Current for Xcode 9 and iOS 11 as far as icon sizes go, but set icon sizes in the pixelSizes array to get what you neeed.
Will generate images for each storyboard in a document, in the format {docName}{artboardName}_{pixelSize}, e.g.
"myDocAB1_120.png"

Tested with Adobe Illustrator CC 22.0.0 and Xcode 9
***/

function saveFile(destFolder, fileName, pixelSize) {

	file = new File(destFolder.fsName + "/" + fileName + ".png");

	// Scale the image based on the pixel size (assuming square, but maybe not, so pick larger value of width and height)
	const scale = 100 * Math.max(pixelSize / document.width, pixelSize / document.height);

	options = new ExportOptionsPNG24();
	options.antiAliasing = true;
	options.transparency = true;
	options.artBoardClipping = true;
	options.includeProfile = false;
	options.verticalScale = scale;
	options.horizontalScale = scale;

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

function createIcons(pixelSizes, srcFileName, folderName) {

	const destinationFolder = new Folder(destFolder.absoluteURI + "/" + folderName);
	if (!destinationFolder.exists) destinationFolder.create();

	// Process each artboard
	for (abIndex = 0; abIndex < document.artboards.length; abIndex++) {

		document.artboards.setActiveArtboardIndex(abIndex);

		var ab = document.artboards[abIndex];

		// Define a file name for each size and create the icon file
		for (sizeIndex = 0; sizeIndex < pixelSizes.length; sizeIndex++) {

			var fileName = srcFileName + ab.name + "_" + pixelSizes[sizeIndex];

			saveFile(destinationFolder, fileName, pixelSizes[sizeIndex]);
		}
	}
}

// Select the destination folder and switch to active document
var destFolder = Folder.selectDialog();
var document = app.activeDocument;


if (document && destFolder) {

	// Remove the doc extension
	var documentName = document.name.substring(0, document.name.lastIndexOf("."));

	// Define sorted sizes for icons in pixels/points
	var pixelSizes = [40, 60, 58, 87, 20, 29, 80, 76, 120, 152, 167, 180, 1024].sort(function (a, b) { return a - b; });

	createIcons(pixelSizes, documentName, "appIconSet_" + documentName);
}