Combined 2 awesome script to make a batch ios icon exporter for photoshop. MSG Me for missing copyright (if there is a size you dont need, you can just comment those elements (add // in front of the line), and set the minSize varible to the size of your biggest export)

Create iOS Icons.jsx

// Batch Export iOS Icons
// Copyright 2014
// Written by Jonas Lindenskov Nielsen (@jlndk)
//got parts of script from  Jeffrey Tranberry (http://www.tranberry.com/photoshop/photoshop_scripting/PS4GeeksOrlando/IntroScripts/openFolder.jsx)
//got parts of script from  Appsbynight on github (https://gist.github.com/appsbynight/3681050)


/* 
Description:
This Script will export all of your files in a folder, to iOS Icons
*/

// enable double clicking from the 
// Macintosh Finder or the Windows Explorer
#target photoshop

// Make Photoshop the frontmost application
// in case we double clicked the file
app.bringToFront();

/////////////////////////
// SETUP
/////////////////////////

// A list of file extensions to skip, keep them lower case
gFilesToSkip = Array( "db", "xmp", "thm", "txt", "doc", "md0", "tb0", "adobebridgedb", "adobebridgedbt", "bc", "bct" );

/////////////////////////
// MAIN
/////////////////////////

// Pops open a dialog for the user to
// choose the folder of documents to process
var inputFolder = Folder.selectDialog("Select a folder of documents to process");

// Pops open a dialog for the user to
// set the output folder
var outputFolder = Folder.selectDialog("Select a folder for the output files");

// Open Folder of Images
OpenFolder();

// show the path to an output folder
alert(outputFolder);

/////////////////////////
// FUNCTIONS
/////////////////////////

// Given the a Folder of files, open them
function OpenFolder() {
        var filesOpened = 0;
        var fileList = inputFolder.getFiles();
        for ( var i = 0; i < fileList.length; i++ ) {
        		   // Make sure all the files in the folder are compatible with PS
                if ( fileList[i] instanceof File && ! fileList[i].hidden && ! IsFileOneOfThese( fileList[i], gFilesToSkip )) {
                        var doc = open( fileList[i] );
                        var minSize = "512";
                        filesOpened++;
                
                	/////////////////////////
					// Put all your processing functions...
					/////////////////////////
                             if (doc.width != doc.height)
                            {
                                alert ("Image is not square");
                            }
                            else if ((doc.width < minSize) && (doc.height < minSize))
                            {
                                alert( "Image is too small!  Image must be at least " + minSize + "x" + minSize +" pixels.");
                            }
                            else if (doc.width < minSize)
                            {
                                alert("Image width is too small!  Image width must be at least "+ minSize +" pixels.");
                            }
                            else if (doc.height < minSize)
                            {
                                alert( "Image height is too small!  Image height must be at least"+ minSize +" pixels.");
                            }else{
						
						var sfw = new ExportOptionsSaveForWeb();
						sfw.format = SaveDocumentType.PNG;
						sfw.PNG8 = false; // use PNG-24
						sfw.transparency = true;
						doc.info = null;  // delete metadata
						var startState = doc.activeHistoryState;       // save for undo
                           var initialPrefs = app.preferences.rulerUnits; // will restore at end
                           app.preferences.rulerUnits = Units.PIXELS;     // use pixels

                            //-- Get the original name ;
                             var fullName = app.activeDocument.name;
                             
                             //-- Locate the final position of the final . before the extension.
                             var finalDotPosition = fullName.lastIndexOf( "." ) ;
                             
                             //-- check that position. If it isn't -1 (missing) return the text
                             //--  up to that position.
                             //-- Note, there are some odd things that can happen when passing
                             //--  a file reference that begins with a single dot. Be wary.
                             if ( finalDotPosition > -1 ) {
                                var fullName = fullName.substr( 0 , finalDotPosition );
                             }

                            var appfolder = Folder(outputFolder+"/"+fullName);
                            //Check if it exist, if not create it.
                            if(!appfolder.exists) appfolder.create();

                        
						var icons = [
						  {"name": "iTunesArtwork@2x", "size":1024},
						  {"name": "iTunesArtwork",    "size":512},
						  {"name": "Icon",             "size":57},
						  {"name": "Icon@2x",          "size":114},
						  {"name": "Icon-72",          "size":72},
						  {"name": "Icon-72@2x",       "size":144},
						  {"name": "Icon-Small",       "size":29},
						  {"name": "Icon-Small@2x",    "size":58},
						  {"name": "Icon-Small-50",    "size":50},
						  {"name": "Icon-Small-50@2x", "size":100}
						];

						var icon;
						for (j = 0; j < icons.length; j++) 
						{
						  icon = icons[j];
						 doc.resizeImage(icon.size, icon.size, null, ResampleMethod.BICUBICSHARPER);

						  var destFileName = icon.name + ".png";
                             
                            if ((icon.name == "iTunesArtwork@2x") || (icon.name == "iTunesArtwork"))
						  {
							// iTunesArtwork files don't have an extension
							destFileName = icon.name;
						  }

						  doc.exportDocument(new File(appfolder + "/" +  destFileName), ExportType.SAVEFORWEB, sfw);
						  doc.activeHistoryState = startState; // undo resize
						}
						
                            }
                		// Cloes the file without saving
                		app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
                        
					/////////////////////////
					// ...in the area between these two comments.
					/////////////////////////
					
				}
        }
        return filesOpened;
}


// given a file name and a list of extensions
// determine if this file is in the list of extensions
function IsFileOneOfThese( inFileName, inArrayOfFileExtensions ) {
	var lastDot = inFileName.toString().lastIndexOf( "." );
	if ( lastDot == -1 ) {
		return false;
	}
	var strLength = inFileName.toString().length;
	var extension = inFileName.toString().substr( lastDot + 1, strLength - lastDot );
	extension = extension.toLowerCase();
	for (var i = 0; i < inArrayOfFileExtensions.length; i++ ) {
		if ( extension == inArrayOfFileExtensions[i] ) {
			return true;
		}
	}
	return false;
}

Awesome, I did have some minor issues with this. When using effects, it would not scale properly. So I made it merge the visible layers (when present).
For good measure I copy-pasted in the latest icon sizes (from progrmr’s updated script)