【Extjs】动态单选按钮

createEvent : function() {
		var me = this;
		me.groupPanel = Ext.create('Ext.form.Panel', {
					title : 'RadioGroup Example',
					width : 300,
					height : 125,
					items : [{
								xtype : 'radiogroup',
								fieldLabel : 'Two Columns',
								columns : 2,
								name : "group",
								vertical : true,
								items : [{
											boxLabel : 'Item 1',
											name : 'rb',
											inputValue : '1'
										}, {
											boxLabel : 'Item 2',
											name : 'rb',
											inputValue : '2',
											checked : true
										}]
							}]
				});
				return me.groupPanel;
	},
	addGroupItems : function(){
		var me = this;
		var group = me.groupPanel.query("radiogroup[name = 'group']")[0];
		group.add(new Ext.form.field.Radio({ boxLabel: "123", name: 'rb', inputValue: "123" }));
	}