Objc Classes

Objective-C is loaded with classes

• everything in an iOS app is defined as a class somewhere in the code that we write

• in objective-c class always have an interface and an implementation.

  • interface
    • interface declares what our class can do and how its going to used by other objects
    • interface is also the place that you declare whether your class inherit from anything.
    • also the instance variable, properties and methods also declare their.
  • implementation
    • the implementation files is how your class does what your interface claims it can do
    • other objects doesn't care about how you implement something as long as they know that you can do it.