For a few private projects the last couple of months I needed to implement a login system before the user could see the actual content.
It seemed like there were quite a few patterns people were using on how to implement such a system. The easiest way to go (imho :-)) is by creating a UIViewController which will serve the protected content and add it as the root view controller of your project. In that UIViewController you can then add a modal view controller which will present the login view. Continue reading Objective-C Login System Tutorial