Abstract factory design pattern objective c tutorial

This tutorial is aimed to guide the definition and application of Gang of Four (GoF) abstract factory design pattern.By reading this tutorial, you will know how to develop a model for the abstract factory pattern, and how to apply it in practice.

Abstract factory pattern is a creational pattern. It provides an interface using which a client can instantiate a group of related Objects. This tutorial explains the Abstract factory pattern using a Car manufacturing algorithm. Factory Method Pattern. A Factory Pattern or Factory Method Pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate. In other words, subclasses are responsible to create the instance of the class. The essence of the Abstract Factory Pattern is to "Provide an interface for creating families of related or dependent objects without specifying their concrete classes". Usage. The factory determines the actual concrete type of object to be created, and it is here that the object is actually created (in C++, for instance, by the new operator). Chapter 5. Abstract Factory A lot of people love pizzas. The structure of a typical pizza is pretty much standard, even though it could be prepared in different pizzerias. A - Selection from Pro Objective-C Design Patterns for iOS [Book] Factory: A factory that creates objects that derive from a particular base class. Abstract factory: A factory that creates other factories, and these factories in turn create objects derived from base classes.You do this because you often don't just want to create a single object (as with Factory method) - rather, you want to create a collection of related objects. Here is my Abstract Factory design pattern tutorial. I also take a second look at the Factory design pattern here as well. This is considered a hard pattern to understand, but I consider it to be a combination of all you have learned previously. You just need to understand tha