gistfile1.js

Ext.define('nombreDeMiApp.view.Main', {
    extend: 'Ext.Container',
    xtype: 'main',
    requires: [
        'Ext.TitleBar',
    ],
    config: {
        
        items: [
                {
                    docked: 'top',
                    xtype: 'titlebar',
                    title: ' Hola Mundo! ',
                    style: 'background:#ff0000'
                },
                {
                    html:"Mi primera app <b> Sencha touch! <b>",
                    styleHtmlContent:true
                }
        ]
    }
});