Over the last 4 months b2cloud has been busily building Google Glass Apps for the most forward thinking companies in Australia. Not to mention the neat little Apps we have developed for demonstration at events around Australia including Glass Tabs – Learning guitar through Google Glass.
When you need to display a view or view controller over every other element in an iOS application, most people go ahead and add it directly to the main window. This may work but can require a bit of tweaking in order to implement your own rotation code if you want to support more than one orientation, and could be later overlaid by things that are supposed to remain behind.
Instead of adding it directly to your existing UIWindow, a better solution is to create a new UIWindow on top of the existing one and then adding things to this UIWindow. It’s recommended to add a UIViewController to this window so all rotations are handled for you.