Download Swift 2 Design Patterns by Julien Lange PDF

By Julien Lange

Build powerful and scalable iOS and Mac OS X video game applications

About This Book

• discover ways to use and enforce the 23 Gang of 4 layout styles utilizing speedy 2
• layout and architect your code for fast program development
• comprehend the position, usual UML layout, and individuals within the category diagram of the trend by way of imposing them in a step by step approach

Who This booklet Is For

This ebook is meant for efficient speedy builders who are looking to follow enduring layout styles with quick to constitution and scale their software code.

What you are going to Learn

• decide on the suitable trend counting on the matter to be solved
• comprehend the accepted category diagram of every of the 23 GoF styles and the way each one item participates within the pattern
• Use rapid to enforce those styles although the language doesn't supply all the object-oriented programming techniques reminiscent of summary category, interface, and so on
• Architect your software program to prevent the overuse of reminiscence, time spent on calculations, or excessive community traffic
• locate how you can set up your code to make it safer from the skin world
• organize your code to make it extra versatile while the patron adjustments or the third-party part hidden code changes
• constitution your code to alter the set of rules to use at runtime
• carry Flyweight accountability for your objects

In Detail

Swift is a multi-paradigm language. It has expressive gains typical to these used to paintings with smooth useful languages, whereas additionally holding the object-oriented positive aspects of Objective-C. It continues to be appropriate with Apple's legacy codes and frameworks. A layout trend systematically names, motivates, and explains a basic layout that addresses a habitual layout challenge in object-oriented structures. It describes the matter, the answer, whilst to use the answer, and its results. It additionally supplies implementation tricks and examples. wisdom approximately layout styles is usually the best way to make you varied in comparison to different low-level developers.

This e-book exhibits you ways to exploit quick 2 to benefit approximately 23 Gang of 4 (GoF) layout styles, and is prepared into 3 different types. The booklet will current you the 5 creational styles, via the seven structural styles, and completing with the eleven behavioral styles as outlined through the GoF. every one bankruptcy will introduce the trend by way of defining its function, which universal difficulties the trend could be used for, its common UML illustration, how each one items awarded within the classification diagram perform the development, and what the function of every of those items is. The e-book then offers you with a concrete case as an example that might be used to enforce the trend utilizing Swift.

Style and approach

A step by step educational accomplished with screenshots and code highlights anywhere valuable. each one bankruptcy discusses a number of styles with its definitions and a simple-to-follow representation case utilizing a playground or XCText undertaking to enforce it with quick.

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Extra info for Swift 2 Design Patterns

Sample text

Each of these manufacturers will build a dial and band that are adapted to the dimension of the watch. [ 15 ] Creational Patterns Implementation To implement our pattern, we first need to identify our actors. The two manufacturers represent the ConcreteFactory1 and ConcreteFactory2 classes. These two factories implement the AbstractFactory method, which tell us that we can create a band or dial. Of course, the concrete factories will create the dial adapted to the size of the watch produced in that manufacture.

Implementation If we want to build some watches that are represented with a dial and band, we will define a Director class that will define the construction order of all the parts of our watches and return the finalized watch to the client. The Director class will call all the constructors who are in charge to construct one part of the watch. To implement this, we will reuse the existing code of the abstract factory pattern and add the following code. _42mm) } } //our Director class class Director { var builder: AbstractWatchBuilder?

ConcreteBuilder: This is the Concrete class that implements the method of the AbstractBuilder class. • Product: This is the finalized product. The product contains all the parts of the watch. Collaborations The client creates the ConcreteBuilder and Director classes. The Director class will then build an object if the client asks him to do so by invoking the constructor and returns the finalized product to the client. Illustration Using the AbstractFactory method, we can use the builder pattern to build a watch.

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