Creating Reusable Factories and Using Ti.App with a Namespace

app.js

// Please note that this is a dirty solution. 
// It does work, but Appcelerator does not support it (adding things to the Ti namespace).
// There is a very good chance that it will not be possible in future releases.

var ui = {};
var labels = {};

Ti.include('ui.js');
Ti.include('labels.js');

// Build the namespace
var NS = {
	ui:ui,
	labels:labels
};

// Make namespace globally available
Ti.App.NS = NS;

var win =  Ti.App.NS.ui.createCustomWindow();
var button = Ti.App.NS.ui.createCustomButton();
win.add(button);

var myLabel = Ti.App.NS.labels.createCustomLabel();
win.add(myLabel);

win.open();

labels.js

(function(){
	labels = {
		createCustomLabel: function(){
			var label = Ti.UI.createLabel({
				top: 10,
				height: 60,
				width: 200,
				text: 'I am a Label'
			});
			
			return label;
		}
	};
})();

ui.js

(function() {
	ui = {
		createCustomWindow: function() {
			var win = Ti.UI.createWindow({
				backgroundColor: 'green'
			});
			return win;
		}
	};
	
	ui.createCustomButton = function() {
		var button = Ti.UI.createButton({
			title: 'Button',
			height: 60,
			width: 150
		});
		return button;
	};
})();