Photoshop Script to Create iPhone Icons from iTunesArtwork

Create iOS Icons.jsx

/** @see http://bit.ly/JPvZ11 */

// Turn debugger on. 0 is off.
// $.level = 1;

var OUTPUT_FOLDER_NAME = "icons"
  , icons = [
    ["iphone_icon_29x29", 29],
    ["iphone_icon_40x40", 40],
    ["iphone_icon_60x60", 60],
    ["ipad_icon_29x29",   29],
    ["ipad_icon_40x40",   40],
    ["ipad_icon_76x76",   76]
  ]
  , exportOptions = new ExportOptionsSaveForWeb()
  ;

exportOptions.format = SaveDocumentType.PNG;
exportOptions.PNG8 = false; // use PNG-24
exportOptions.transparency = false;

function main() {
  var initialPrefs = app.preferences.rulerUnits
    , dialogUsed = false
    , file, doc, folder
    ;
  if(app.documents.length)
    doc = app.activeDocument;
  else {
    file = File.openDialog("Select the iTunesArtwork file.");
    if(!file) return;
    doc = open(file);
    dialogUsed = true;
  }
  folder = Folder.selectDialog ("Select folder to output");
  app.preferences.rulerUnits = Units.PIXELS;
  folder && exportIcons(doc, folder);
  dialogUsed && doc.close(SaveOptions.DONOTSAVECHANGES);
  app.preferences.rulerUnits = initialPrefs;
}

function exportIcons(doc, folder) {
  for(var i = 0, j = 0, icon; icon = icons[i++]; j = 0) {
    for(j=1; j<=3; j++)
      exportIcon(doc, folder, icon[0], icon[1], j);
  }
}

function exportIcon(doc, folder, name, size, scale) {
  var dup;
  size *= scale;
  if(scale > 1)
    name += "@" + scale + "x";
  dup = doc.duplicate(name, true);
  dup.resizeImage(size, size, null, ResampleMethod.BICUBICSHARPER);
  dup.exportDocument(new File(folder + "/" + name + ".png"), ExportType.SAVEFORWEB, exportOptions);
  dup.close(SaveOptions.DONOTSAVECHANGES);
}

main();

Create Mac Icons.jsx

/** @see http://bit.ly/VTacev */

// Turn debugger on. 0 is off.
// $.level = 1;

var OUTPUT_FOLDER_NAME = "icons"
  , icons = [
    ["icon_32x32",    16],
    ["icon_32x32",    32],
    ["icon_128x128", 128],
    ["icon_256x256", 256],
    ["icon_512x512", 512]
  ]
  , exportOptions = new ExportOptionsSaveForWeb()
  ;

exportOptions.format = SaveDocumentType.PNG;
exportOptions.PNG8 = false; // use PNG-24
exportOptions.transparency = true;

function main() {
  var initialPrefs = app.preferences.rulerUnits
    , dialogUsed = false
    , file, doc, folder
    ;
  if(app.documents.length)
    doc = app.activeDocument;
  else {
    file = File.openDialog("Select the iTunesArtwork file.");
    if(!file) return;
    doc = open(file);
    dialogUsed = true;
  }
  folder = Folder.selectDialog ("Select folder to output");
  app.preferences.rulerUnits = Units.PIXELS;
  folder && exportIcons(doc, folder);
  dialogUsed && doc.close(SaveOptions.DONOTSAVECHANGES);
  app.preferences.rulerUnits = initialPrefs;
}

function exportIcons(doc, folder) {
  for(var i = 0, j = 0, icon; icon = icons[i++]; j = 0)
    do exportIcon(doc, folder, icon[0], icon[1], !!j) while(!(j++));
}

function exportIcon(doc, folder, name, size, retina) {
  var dup;
  if(retina) {
    size *= 2;
    name += "@2x";
  }
  dup = doc.duplicate(name, true);
  dup.resizeImage(size, size, null, ResampleMethod.BICUBICSHARPER);
  dup.exportDocument(new File(folder + "/" + name + ".png"), ExportType.SAVEFORWEB, exportOptions);
  dup.close(SaveOptions.DONOTSAVECHANGES);
}

main();