Head First iPhone and iPad Development, 2nd Edition

Chapter 5. Plists and Modal Views: Refining your app

So you have this almost-working app...

That’s the story of every app! You get some functionality working, decide to add something else, need to do some refactoring, and respond to some feedback from the App Store. Developing an app isn’t always ever a linear process, but there’s a lot to be learned along the way.

It all started with Sam...

Sam wanted an app to make his bartending work easier. You got one up and rolling pretty quick, but hit a snag filling in the details for each drink because of a plist of dictionaries.

When we last left DrinkMixer, you were in the middle of debugging it...

Anatomy of a Crash

DrinkMixer started and ran happily until it hit our breakpoint at line 19. The debugger stopped our application and displayed the debugging console. By setting a breakpoint in our code, what we discovered at the end of Chapter 4 is that before your app imported the file, there was no crash; so far so good.

Let’s walk through loading our plist and make sure that works by typing next twice. The first “next” sets up the path to the plist, the second one actually loads the data.

Loading the plist worked fine; no problems there. The error must ...