Some iPhone Development Stuff

I was working on coding some Water-Fuel display systems that needed floating point numbers converted to a 2 decimal place display for the UI.

NSString* formattedNumber = [NSString stringWithFormat:@"%.02f", myFloat];

This came from a great Stackoverflow question here:
http://stackoverflow.com/questions/560517/make-a-float-only-show-two-decimal-places

When I'm making lots and lots of model objects from existing applications, I often want to generate Objective-C from JSON or GSON. I use http://tigerbears.com/objectify/ for that.

Trying to figure out some stuff about Apple's in-app purchasing system I learned a lot from reading http://www.raywenderlich.com/2797/introduction-to-in-app-purchases which is an excellent tutorial on an excellent site.