Titanium getElemetByTag()

app.js

/**
 * Gets a Titanium Element
 * @param  {Ti.UI.View}		Parent View - Where the view is
 * @param  {String} tag		Property of the view
 * @param  {String} value	Value of the custom property
 * @return {Ti.UI.View}		Return a view if found, otherwise null;
 */
function getElementByTag(parent, tag, value){

	// Store the array in a variable for better performance
	var childrenArray = parent.children;

	// iterate through all the children
	for(var i = 0, len = childrenArray.length; i < len; i++){

		// Store the child in a variable for better performance
		var child = childrenArray[i];

		// get the custom property
		var customProp = child[tag];

		// Two checks
		//	1. That the prop exists
		//	2. If so, that the prop is equal to the value
		if(customProp && customProp == value){

			// return child view
			return child;
		}
	}
	// nothing found!
	return null;
}


var view = Ti.UI.createView();

for(var i = 0, i < 20; i++){
	view.add(
		Ti.UI.createTextField({
			value: 'foo',
			bar: 'id'+i
		})
	);
}

var textField = getElementByTag(view, 'bar', 'id2');

if(textField != null){

	// Do whatever

}