Add an Ext.getByXType function. Returns an array of all components having the specified xtype (global search from root). Tested in Sencha Touch 2.

GetByXType.js

/*
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*/

Ext = Ext || {};
Ext.getByXType = function(xtype){
	var result = [];
	Ext.Object.each(Ext.ComponentMgr.map, function(key, value){
		if (value.isXType(xtype)) {
			result.push(value);
		}
	});
	return result;
};