Sencha Touch 2: How Can I Add Google+ Login?

I would like to add a Google+ Login to my Sencha Touch 2 webapplication, according to https://developers.google.com/+/web/signin/?hl=de#using_the_client-side_flow. I have added the

Solution 1:

It's probably not working because the .g-signin element is getting added to the dom after after Google tries to render the button. Take a look at adding the sign-in button to your page with JavaScript. Especially step four where gapi.signin.render('myButton', additionalParams); is used to render the button.