gistfile1.js

var CustomSwitch = function(onText, offText, value) {
	// the custom view
	var view = Ti.UI.createView();

	var label = Ti.UI.createLabel();
	var sw = Ti.UI.createSwitch();

	view.add(label);
	view.add(sw);

	// this function returns the text to be shown in the label, based on val
	var getLabelText = function(val) {
		return (val ? onText : offText);
	};

	// this function updates the label and the switch based on val
	var changeValue = function(val) {
		label.text = getLabelText(val);
		sw.value = val;
	};	

	// when the switch changes its state we change the label and fire and event to the listeners
	sw.addEventListener('change', function(e) {
		changeValue(e.value);
		view.fireEvent('change', e);
	});

	//initialize the state of our custom view
	changeValue(value);

	//Privileged method
	view.changeValue = changeValue;

	return view;
};

// we instantiate it as:
var my_switch = new CustomSwitch('switched on', 'switched off', true);

//my_switch is now a reference to the view created in the 	CustomSwitch() function

Ti.UI.currentWindow.add(my_switch);