Photoshop script (.jsx) resizing icons automatically for iOS devices and create different Retina versions (@2x & @3x)

photoshop-resize-icons-for-ios

try
{
var inputFolder = Folder.selectDialog("Select a folder to process");
var fileList = inputFolder.getFiles("*.png"); 

var initialPrefs = app.preferences.rulerUnits; // will restore at end
app.preferences.rulerUnits = Units.PIXELS;     // use pixels
  
    var destFolder = Folder.selectDialog( "Choose an output folder");

    var x2Folder = new Folder ( destFolder + "/@2x");
    x2Folder.create();
    var x3Folder = new Folder ( destFolder + "/@3x");
    x3Folder.create();
    
    var sfw = new ExportOptionsSaveForWeb();
    sfw.format = SaveDocumentType.PNG;
    sfw.PNG8 = false; // use PNG-24
    sfw.transparency = true;
  
var i, j;

stripFileName = function(fileName){

	return fileName.substring(0, (doc.name.length - 4));
}

for(i=0; i<fileList.length; i++) {
 
    var doc = open(fileList[i], OpenDocumentType.PNG);
	
    var icons = [
     {"name": stripFileName(doc.name) + "@2x.png", "size":70, "folder": "/@2x/"   },
     {"name": stripFileName(doc.name) + "@3x.png", "size":105, "folder": "/@3x/"   }
    ];
    var destIcon;
    var destFileName;

    for (j = 0; j < icons.length; j++) 
    {
      destIcon = icons[j];
      doc.resizeImage(destIcon.size, destIcon.size, // width, height
      null, ResampleMethod.BICUBICSHARPER);
      destFileName = destIcon.name;
      doc.exportDocument(new File(destFolder + destIcon.folder + destFileName), ExportType.SAVEFORWEB, sfw);
   
    }
    doc.close(SaveOptions.DONOTSAVECHANGES);
}
     alert("iOS icons created!");
  }

catch (exception)
{
 	if ((exception != null) && (exception != ""))
    alert(exception);
 }
finally
{
    if (doc != null)
        doc.close(SaveOptions.DONOTSAVECHANGES);
        app.preferences.rulerUnits = initialPrefs; 
}