Sencha Touch Passcode

Is there a control in Sencha Touch to show a passcode field like shown 开发者_如何学编程in picture below?

No theres no native component who does exactly this. But you can build it by yourself: its a form with 4 input fields and a dozen buttons. See documentation for more details: http://docs.sencha.com/touch/1-1/#!/api/Ext.form.FormPanel

No, you have to build and design this one completly by yourself.

Note: To get rid of the browser controls, you have to enforce that the application is running form the homescreen. You can control (with some Javascript) if the application is running MobileSafari or as a "Web App". (see: http://cubiq.org/add-to-home-screen as an example of such an implementation)

But, however, I would not recommend using such a component. A) This can confuse people and B) Can intent users to type in their regular passcode. As a developer I wouldn't be comfortable with that situation.