Tutorial Sencha Touch Fallback

gistfile1.js

// Get the latest view definition from server
$fh.act({act: 'getUI', req: {} }, function (res) {
	// Returned object is our menu definition, so we can use it to initialise the menu, but lets save it locally first

	$fh.data({
	  act: 'save',
	  key: 'menu_definition',
	  val: JSON.stringify(res)
	});

	// Use the retrieved view to initialise the app
	...

}, function (code, errorprops, params) {
	// If there's a problem getting defintion from server, fall back to a locally stored definition

	$fh.data({
	  	key: 'menu_definition'
	}, function (data) {
		  // Use the retrieved view data to initialise the app
		  ....
	}, function () {
		  // No view available, drop back to view stored in client files
		  ....
	});

});