O'Reilly logo

Object–Oriented Programming with Swift 2 by Gastón C. Hillar

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Declaring classes that adopt protocols

Now, we will declare a class that specifies that it conforms to the ComicCharacter protocol in its declaration in the Playground. Instead of specifying a superclass, the class declaration includes the name of the previously declared ComicCharacter protocol after the class name (AngryDog) and the colon (:). We can read the class declaration as "the AngryDog class conforms to the ComicCharacter protocol."

However, the class doesn't implement any of the required properties and methods specified in the protocol, so it doesn't really conform to the ComicCharacter protocol, as shown in the following:

public class AngryDog: ComicCharacter {

}

The Playground execution will fail because the AngryDog class doesn't conform ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required