Chapter 11

The Trip Model

In This Chapter

arrow Recognizing the importance of models

arrow Working with property lists

arrow Starting the Trip class implementation

arrow Displaying variable content in the debugger

It’s time to add some content to RoadTrip. The owner of RoadTrip’s data is the model, so I start this chapter with a look at the data you’ll need and how the model will manage it. Then I show you how to add a Trip class that will serve as the interface to the model. Finally, you see how to add the Destination class — which is one of the objects that will be used by the model but is hidden behind the Trip interface.

What the Model Contains

In the Model-View-Controller (MVC) design pattern that is the basis for all iOS apps, the model owns the app content logic and data. Therefore, to design your model, the best place to start is with the app design I present in Chapter 4 and consider what will be displayed in the views.

In this first version of RoadTrip, the model needs to provide, for each destination, the following:

  • The destination name
  • A background image for the destination
  • The destination ...

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