Swift programming language

8 Key excerpts on "Swift programming language"

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  Available until 4 Dec |Learn more

  Programming Language Explorations

  • Ray Toal, Rachel Rivera, Alexander Schneider, Eileen Choe(Authors)
  • 2016(Publication Date)
  • Chapman and Hall/CRC

    (Publisher)

  C H A P T E R 12 Swift Swift is an innovative, open source language developed by Apple to make software safer, faster, and more fun to create. First appeared 2014 Creator Apple Inc. Notable versions 1.0 (2014) • 2 (2015) • 3 (2016) Recognized for Being the modern alternative to Objective-C Notable uses Native applications for macOS, iOS, watchOS, and tvOS Tags Imperative, Safe Six words or less The modern language for iOS In the early 2010s, two operating systems dominated the mobile market: Android [40] and iOS [3]. While some mobile developers target only a device’s web browser, many will opt to write native applications in a language and environment built to talk directly with the operating system. Android devices are generally programmed in Java. iOS devices favor Objective-C or the newer Swift. Swift is a powerful, general purpose systems language that feels like a scripting language. While best known for its support for the Cocoa framework that provides services to iOS and its cousins macOS, watchOS, and tvOS, our focus in this chapter will be on Swift the language, not the APIs. Swift has much to offer the student of languages, especially as its initial developer, Chris Lattner, is famous for originating LLVM—a compiler framework used by many modern programming language implementations. Swift’s design exhibits an elegant, consistent integration of the best modern features around. We’ll start with our usual three example scripts and present the basic elements of the language. We’ll pay particular attention to the features of Swift that make it a safe language, such as guaranteed memory initialization, static typing, overflow checking, and excellent syntactic support for optionals. But our study will not be without new features. We’ll see external parameter names, for one, and look at the role of protocols and extensions in the type system.

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  eBook - ePub

  Learn iOS Application Development

  Take Your Mobile App Development Skills to the Next Level with Swift and Xcode (English Edition)

  • Rudra S Misra(Author)
  • 2021(Publication Date)
  • BPB Publications

    (Publisher)

  HAPTER 2

  Swift programming language

  I n 2014, Apple introduced Swift to the developers to start the app development for the Cocoa and Cocoa Touch platforms. Cocoa created for the macOS, where Cocoa Touch has been designed for the touch devices like iPhone, iPad, Apple TV, and Apple Watch. And using Swift, you can develop the apps for the whole Apple ecosystem.

  Swift uses the Objective-C runtime which allows to run C, C++, Objective-C, and Swift within one program. For an experienced developer, Swift syntaxes can match with Ruby, Python, C#, and other advanced programming languages.

  Structure

  The following topics will be covered in this chapter:

  • Swift Playground
  • Naming and declaration
  • Control flows
  • Loops
  • Operators and expressions
  • Data collections
  • Optional types
  • Functions
  • Closures
  • Structures
  • Classes
  • Protocols and delegates

  Objective

  In this chapter, you will learn about the Swift programming language from scratch. We will discuss the syntaxes, and their purposes for a smooth programming environment.

  Here, you will mostly work on Swift as a programming language, rather than utilizing the actual app development environment of Xcode .

  Playgrounds allows us to write and execute Swift syntaxes in a typical code editor environment, and display the result in a console. Therefore, in this chapter, we will utilize such a Playground environment to learn and practice the Swift language.

  Swift: the all-purpose programming language

  Since December 2015, Swift has been an open-source, and could access all the details from the following website: https://www.swift.org Swift’s REPL are available to compile and run the Swift code in multiple platforms like the macOS, Ubuntu, and so on, as well as in the web browsers.

  Swift also works for the server-side coding. Apple has launched the SwiftNIO framework to support platforms like IBM’s Kitura , Vapor, Perfect

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  eBook - ePub

  Ultimate SwiftUI Handbook for iOS Developers

  A complete guide to native app development for iOS, macOS, watchOS, tvOS, and visionOS

  • D??ng ?ình B?o (James) Th?ng, Duong Dinh Bao Thang(Authors)
  • 2023(Publication Date)
  • Orange Education Pvt Ltd

    (Publisher)

  HAPTER 1

  Swift Language

  Introduction

  Swift is a powerful and modern programming language that was introduced by Apple in 2014. It has quickly gained popularity among developers due to its simplicity, safety, and performance. Swift is designed to be easy to learn and use, even for those who have never coded before, yet it is also a language that can be used to develop complex applications for iOS, macOS, watchOS, and tvOS. With its concise syntax and advanced features, such as optionals and closures, Swift is a versatile language that can be used for a wide range of applications. In this era of mobile and desktop computing, Swift is a language that every programmer should consider learning to stay competitive in the industry.

  Structure

  In this chapter, the following topics will be covered:

  • Setting up Xcode
  • Variable and constant
  • Type and Optional Type in Swift
  • Common ways to unwrap Optional Type
  • Logical operators
  • Conditional statements
  • Array vs dictionary
  • Scope and function
  • Struct vs class

  Downloading Xcode

  On your Mac, go to the AppStore => Search for Xcode => Install it . Depending on your Wi-Fi, this will take around one to a couple of hours. When you are done and ready, let’s take a quick tour of it.

  Xcode 14.2 is used at the moment of writing this book. Now, let’s make our first Programming Project: “Hello World ”.

  Launch Xcode from your Mac, and then on the top left, select File => New => Project :

  Figure 1.1: Launching Xcode

  In this book, we will only be using the App category for iOS, and most iOS developments will choose this Option to start a New Project. While there are other things to explore, they are just templates with pre-setups. The option App will provide a clean New one to start. Now, click Next .

  Figure 1.2: Setting of project metadata

  • Here we will be setting the Project important metadata. The Name of this Project which will be Hello World. The Team here is the Developer Team. Now if you want to ship App to AppStore then you will need to buy yearly Subscription which will be $99 for Individual and $199 for Corporation. But if you just doing it for your own in the Personal Computer then just register your team with your personal Apple ID. One of the best advice here is just keep building and learning until you are fully ready then consider buying a real Developer Program.

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  eBook - ePub

  iOS Developer Solutions Guide

  Learn How to Create Stable and Bug-free iOS Apps (English Edition)

  • Narendar Singh Saini(Author)
  • 2023(Publication Date)
  • BPB Publications

    (Publisher)

  HAPTER 3

  Swift programming language

  Introduction

  Swift is a multi-paradigm programming language. This language is very new and came into the picture in 2014. Swift adopted many good features from the different programming languages. We understand that learning the entire language in a single chapter is out of the scope of this book. So, we have listed some of the topics that every developer should know. If you have a weaker understanding of the topics that we are going to discuss, the language itself can be a major roadblock to developing good applications. The topics we will cover in this chapter will be used in almost any type of iOS application.

  Structure

  In this chapter, we will discuss the following topics:

  • Functional aspects of the language
  • Initializers while constructing Class and Struct
  • Properties
  • Optional
  • Protocols
  • Error handling
  • Generics
  • Async/Await

  Objectives

  After reading this chapter, you will have a clear understanding of what functional programming is. You will understand closures, pure functions, first-class functions, and higher-order functions. You will see different types of class and structure initializers and how delegates can be replaced with closures. You will understand how generic works, as well as error handling. In other words, after reading all the mentioned topics, you will be able to write robust and clean code with confidence.

  Functional aspects of the language

  Swift is a multi-paradigm language. It has object-oriented programming, generic programming, protocol programming, and functional programming aspects. If you have working experience in object-oriented programming, then a transition to functional programming can be a bit difficult. Functional programming has a totally different perspective than object-oriented programming. It will take you some time to understand how functional programming works. In iOS development, you cannot skip functional programming. Many things directly depend on functional programming concepts such as SwiftUI, Combine Framework, Higher Order Functions, and so on. In this section, we will provide you with some guidance on functional programming to help you write programs from that angle. We have sorted out some of the topics for this section. After reading this section, you will be able to understand topics such as closures, pure functions, first-class functions, higher-order functions, immutability vs mutability and why functional programming has a lack of side effects.

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  eBook - ePub

  Swift For Dummies

  • Jesse Feiler(Author)
  • 2015(Publication Date)
  • For Dummies

    (Publisher)

  Apple has two annual calendars of events. Each is highlighted by one or more major announcements with periodic updates throughout the year. For consumers and end users, the annual calendar focuses on the releases of new and updated devices. As is true throughout the world of electronics, a large portion of annual sales occur during the summer and fall (“back-to-school”) and during the year-end holiday season.

  On the software side, there is a related peak period. It’s no accident that Apple, Google, and Microsoft all hold conferences for their developers in May and June. Typically, they unveil the new features in their operating systems at that time, allowing developers a few months to work with those features before the peak period of hardware sales.

  In June of 2014, one of the highlights of Apple’s Worldwide Developers Conference (WWDC) was the announcement — a surprise to many attendees — of a new development language for iOS and OS X devices. Called Swift, it was presented as the language of the future for Apple’s developers, but it was made very clear that it would co-operate with the existing basic development language — Objective-C.

  This book gets you started developing with Swift. You’ll quickly see how to create projects in Swift from the built-in templates that are part of the Xcode development tool. From there, you’ll delve into features of the languages ranging from the basics to the advanced features that are unique to Swift as well as some features of Swift that may be familiar to you from other modern programming languages.

  Swift and Objective-C are the languages most often used in building apps for iOS and OS X. Combined with the Cocoa (OS X) and Cocoa Touch (iOS) frameworks and Xcode, these languages allow you to develop just about anything you can dream of. It is hard to find an app that can’t be written with these tools: OS X and iOS apps as well as other Apple products such as Pages, Keynote, and Numbers are developed using Xcode and the Cocoa frameworks. Most of the language work for these products is in Objective-C or Swift, although some sections are still in C++. Apps developed with these technologies are native

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  eBook - PDF

  Invitation to Computer Science

  • G.Michael Schneider, Judith Gersting(Authors)
  • 2018(Publication Date)
  • Cengage Learning EMEA

    (Publisher)

  Swift bor-rows much from Objective-C, and can work alongside Objective-C, but with faster performance. It also adds some modern programming constructs and attempts to make it harder to do “unsafe” things. This announcement was for the beta release only, meaning that the code was available to registered Apple developers but not yet to the general public. In July 2015, Lyft, an on-demand transportation company, announced that its mobile app for iOS platforms had been completely rewritten in Swift. In September 2015, Apple announced the first public Swift version, Swift 1.0. Originally a proprietary language, that is, the implementation of the language is controlled solely by the vendor (Apple in this case), Swift became open source software in December 2015, and now runs on Linux machines as well as all Apple prod-ucts. While the rise in the use of Swift was initially driven by Apple apps, the ability to run Swift programs on low-cost Linux servers that support many web apps will increase its usage as a programming language. By March 2017, less than two years after its first publicly released ver-sion, Swift had entered the “top 10” language group for the first time on the language popularity site www.tiobe.com/index.php/content/paperinfo/tpci/ index.html . The latest version of Swift was released in September 2016. “geofences.” The first thing that happens when a client requests a car-and-driver via mobile phone is to locate the geofence from which the client is calling. Hundreds of thousands of geofence lookups are needed per second, and Uber requires that 99% of them be done in less than 100 milliseconds. In 2015, Uber wrote a new system to handle this task using the Go language in part because Go could provide high throughput (could handle this volume of tasks) with low latency (delay). As proof of its success, on New Years Eve in 2015, the new system handled a peak load of 170,000 queries per second with a 99% response time of less than 50 milliseconds.

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  iOS Programming Cookbook

  • Hossam Ghareeb(Author)
  • 2017(Publication Date)
  • Packt Publishing

    (Publisher)

  Swift programming language

  In this chapter, we will cover the following topics:

  • Using closures to create self-contained code
  • Creating enumerations to write readable code
  • Working with protocols and delegates
  • Using extensions to extend classes functionality
  • Working with memory management and ARC
  • Using error handling
  • Using generics to write generic and reusable code

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  Introduction

  Welcome to our first chapter in iOS Programming Cookbook . We will start our journey in this book with a revision or emphasize on the most important and commonly used topics in Swift programming language. Before talking about these topics, ensure that you have a basic knowledge about Swift programming language and have used it before.

  It has been more than 2 years since Apple released the awesome programming language-Swift. Swift is meant to be easy to code, easy to learn, safe, and intuitive. For each version of Swift, Apple introduces some awesome features and enhancements in the language. As we see in Swift 2.0, Swift came with higher performance, and new APIs such as error handling, and some enhancements. Swift is not meant to be available in iOS development only; you may find it in other platforms later in the future, thanks to the announcement of Apple that Swift will become open source.

  Our recipes in this chapter will focus on the most important topics in Swift that will be used frequently in iOS development. When you focus on these topics and learn them properly, you will find using them in development will make your life easier and your code will be more organized. There are many people who can write code, but only few can write awesome code. Thus, mastering these topics is very important to be a good developer and to help you and others working on a project.

  For the latest features of Swift, ensure that you are using the latest version of Xcode.

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  Using closures to create self-contained code

  Closures are self-contained lines of code to be executed and passed like any other data types. You should be familiar with blocks or at least heard about them in Objective-C or C. This recipe will help you to understand closure syntax and get familiar in using them.

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  eBook - ePub

  The Ultimate iOS Interview Playbook

  Conquer Swift, frameworks, design patterns, and app architecture for your dream job

  • Avi Tsadok(Author)
  • 2023(Publication Date)
  • Packt Publishing

    (Publisher)

  5

  The Swift programming language

  As we discussed in Chapter 4 , understanding data structures is a crucial and complex skill for any developer, regardless of the platform or language they work with. Data structures are the foundation of computer science programming and algorithms, and mastering them is essential for success as a developer. Now that we have a solid understanding of data structures, it’s time to move on to another important aspect of iOS development: Swift.

  Swift is a highly popular topic in iOS interviews, and it’s not only a programming language for iOS developers but also the core foundation of Apple’s new frameworks and technologies.

  Therefore, understanding Swift’s primary features such as structs, property wrappers, generics, and more is vital to succeeding in iOS development and passing an interview. The close relationship between Swift and Apple’s latest technologies makes a deep understanding of the language crucial for any iOS developer.

  In this chapter, we will learn about optionals, access levels, and closures. We will also review computed and lazy properties, extensions, generics, error handling, protocols, and memory management questions.

  To that end, we will cover the following topics:

  • How do we master all Swift features?
  • Basic Swift features
  • Advanced Swift language features

  It’s essential to ensure that we have a good grasp of the primary language features to excel in the iOS interview process. But how can we ensure that we are fully covered in knowledge and understanding? We will see in this chapter.

  How do we master all Swift features?

  First, reading this chapter will get us through most of the important Swift features interviewers ask about in the iOS technical interviews.

  But that’s not enough.

  To become a true professional, we must start acting like one.

  For example, reading the official Swift documentation is an excellent start to ensure we are covered with the latest Swift enhancements. We will ensure we cover the basics by going over access levels, error handling, and extensions. But don’t think of Swift as just a programming language. Some features were developed with deep thinking and interesting methodology.

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