Swift Object-oriented concepts and basic features

Object-oriented is a modern popular program design method, is the mainstream program design code

Basic object-oriented features include: encapsulation, inheritance, and polymorphism:

Encapsulation: As much as possible to hide the internal details of the object, the external formation of a boundary, only a limited external interface to make it contact with the outside.

Inheritance: Some special classes can have all the properties and methods of the general class, this is called the special class to the general class inheritance, such as passenger ships and ships, passenger ferries are special classes, ships are general class, usually referred to as the General class as the parent class, special class for the kind of

Polymorphism: When an object's polymorphism means that a property or method defined in the parent class is inherited, it can make the same property or method have different meanings in the parent class and in each, which becomes polymorphic

This article is from the "Ordinary Road" blog, please be sure to keep this source http://linjohn.blog.51cto.com/1026193/1621084

Swift Object-oriented concepts and basic features