Programming in Objective-C

7. More on Classes

In this chapter you'll continue learning how to work with classes and write methods. You'll also apply some of the concepts you've learned in the previous chapter, such as program looping, making decisions, and working with expressions. First, we'll talk about splitting your program into multiple files to make working with larger programs easier.

Separate Interface and Implementation Files

It's time to get used to putting your class declarations and definitions in separate files. Typically, a class declaration (that is, the @interface section) is placed in its own file, called class.h. The definition (that is, the @implementation section) is normally placed in a file of the same name, using the extension .m instead. So, let's ...