Add (right) Button to Sencha Navigation View - sencha-touch-2

Question

I want to dynamically add a (right aligned) button to the active navigation view depending on view Im showing. Is there any proper way to do it? I found many half good examples online, but didnt get them to work. Here is what I tried:
Ext.define('Sencha.view.user.Login', {
extend:'Ext.navigation.View',
//fullscreen: true,
xtype: 'loginview',
requires:[
'Ext.form.FieldSet',
'Ext.field.Email',
'Ext.field.Password'
],
config: {
title: 'Log in',
iconCls: 'use',
cls: 'kidsbackground',
scrollable: false,
navigationBar: {
items: [
]
},
items:[
{
xtype: 'loginform'
}
]
},
addRightButton:function(button){
var navigationBar = this.config.navigationBar;
console.log("navigationBar: "+navigationBar);
var rightButton = Ext.Button.create({
xtype: 'button',
ui: 'action',
iconCls: 'action',
iconMask: true,
align: 'right' });
console.log("rightButton: "+rightButton);
//navigationBar.addItem(rightButton);
var oNavigationbar = {
docked: 'top',
backButton : {
margin: 7,
docked: "left",
ui : 'back'
},
items: [
Ext.create("Ext.Button", {
text: "Button1"
}),
Ext.create("Ext.Button", {
text: "Button2",
align: "right"
})
]
};
this.setNavigationBar(oNavigationbar);
/*this.setNavigationBar({
items: [
{
id: 'rightButton',
xtype: 'button',
text: 'yes!'
//placeHolder: 'Search...',
//align: 'right'
}
]
});*/
console.log("wow, no crash, really ?");
}
});
When I run the above code I get strange errors, one of this is this (see attachment):

Answer 1

You can try this code (in Chrome Developer Tools' console) on the Sencha Touch 2 Navigation View example :
Ext.ComponentQuery.query('navigationview')[0].getNavigationBar().add({
xtype:'button',
text:'Right',
align:'right'
});
It basically get the navigationview, then the navigation bar of this view and finally add the button to it.
This is the proper way to add a button to the navigation bar.
Hope this helps

Answer 2

different way
var navigationView = Ext.create('Ext.NavigationView',
{
useTitleForBackButtonText: false,
scrollable: false,
layout:
{
type: 'card',
animation: null
},
navigationBar:
{
items:
[
{
xtype: 'togglefield',
name: 'smsmode',
align: 'right',
value: 0,
disabled: true
},
{
text: '',
iconCls: 'delete',
align: 'right',
ui: 'back',
listeners:
{
tap: function()
{
navigator.app.exitApp();
}
}
}
]
}
});