Since you already have Objective-C down, you're pretty much there. You know what you want to build, and you already know the language. I'm assuming you're new t

Since you already have Objective-C down, you're pretty much there. You know what you want to build, and you already know the language. I'm assuming you're new to Xcode, which is the cleanest and easiest environment I have ever developed in. I recommend just finding an "Introduction to Xcode" video, and then just dive in to your project. Take it one step at a time; find a Facebook login tutorial and learn how to do that, etc. It's definitely not as hard as it may seem, but it takes some getting used to.