iOS开发指南：第六版

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"iOS编程：The Big Nerd Ranch指南第6版" 本书是针对iOS 10、Swift 3和Xcode 8更新的一本全面的iOS应用开发指南。作者Christian Keur和Aaron Hillegass通过这本书，引领读者掌握开发iOS应用程序的核心概念、技术和工具。完成阅读后，读者将具备独立进行iOS项目开发的知识与信心。本书内容广泛，涵盖了以下几个关键知识点： 1. **Swift语言基础**：Swift是苹果为iOS、macOS、watchOS和tvOS开发的编程语言。书中会详细介绍Swift的语法、数据类型、控制流、函数、类和结构体等基本概念。 2. **Xcode IDE使用**：Xcode是iOS开发者的主要开发环境，包括代码编辑器、界面设计工具和调试器等。书中会教授如何使用Xcode创建项目、编写代码、调试应用以及构建用户界面。 3. **Cocoa Touch框架**：Cocoa Touch是iOS应用程序开发的基础，提供了UI组件和手势识别等功能。学习者将了解如何使用UIViewController、UIView及其子类，以及Storyboard和Auto Layout来创建动态和响应式的用户界面。 4. **模型-视图-控制器（MVC）架构**：iOS开发中常见的设计模式，用于分离业务逻辑、数据和用户界面。书中会解释如何组织代码以遵循MVC原则。 5. **数据持久化**：涵盖Core Data和SQLite等技术，用于在应用关闭后保存数据，确保用户状态的持久化。 6. **网络编程**：介绍URLSession和JSON解析，讲解如何从服务器获取数据并更新应用内容。 7. **多线程编程**：讲解GCD（Grand Central Dispatch）和操作队列，用于在iOS应用中管理并发任务，提高性能。 8. **动画和手势识别**：如何使用Core Animation创建动态效果，以及如何添加手势识别来增强用户体验。 9. **推送通知和定位服务**：如何集成Apple的推送通知服务，并使用Core Location框架获取和处理位置信息。 10. **测试和App Store发布**：涵盖单元测试、UI测试和应用发布流程，确保应用的质量和合规性。通过这些详细讲解，本书不仅提供了理论知识，还包含大量实例和实践项目，帮助读者在实践中巩固所学。无论是初学者还是有经验的开发者，都能从中受益，提升自己的iOS开发技能。

ptg18651516

Introduction

xvi

Chapter4 introduces delegation, an important iOS design pattern. You will also add a text field to

WorldTrotter.

In Chapter5, you will expand WorldTrotter and learn about using view controllers for managing user

interfaces. You will get practice working with views and view controllers as well as navigating between

screens using a tab bar.

In Chapter6, you will learn how to manage views and view controllers in code. You will add a

segmented control to WorldTrotter that will let you switch between various map types.

Chapter7 introduces the concepts and techniques of internationalization and localization. You will

learn about Locale, strings tables, and Bundle as you localize parts of WorldTrotter.

In Chapter8, you will learn about and add different types of animations to the Quiz project that you

created in Chapter1.

Chapter9 will walk you through some of the tools at your disposal for debugging – finding and fixing

issues in your application.

Chapter10 introduces the largest application in the book – Homepwner. (“Homepwner” is not a typo;

you can find the definition of “pwn” at www.wiktionary.org.) This application keeps a record of your

items in case of fire or other catastrophe. Homepwner will take eight chapters to complete.

In Chapter10 – Chapter12, you will work with tables. You will learn about table views, their view

controllers, and their data sources. You will learn how to display data in a table, how to allow the user

to edit the table, and how to improve the interface.

Chapter13 introduces stack views, which will help you create complex interfaces easily. You will use a

stack view to add a new screen to Homepwner that displays an item’s details.

Chapter14 builds on the navigation experience gained in Chapter5. You will use

UINavigationController to give Homepwner a drill-down interface and a navigation bar.

Chapter15 introduces the camera. You will take pictures and display and store images in Homepwner.

In Chapter16, you will add persistence to Homepwner, using archiving to save and load the application

data.

In Chapter17, you will learn about size classes, and you will use these to update Homepwner’s

interface to scale well across various screen sizes.

In Chapter18 and Chapter19, you will create a drawing application named TouchTracker

to learn about touch events. You will see how to add multitouch capability and how to use

UIGestureRecognizer to respond to particular gestures. You will also get experience with the first

responder and responder chain concepts and more practice using structures and dictionaries.

Chapter20 introduces web services as you create the Photorama application. This application fetches

and parses JSON data from a server using URLSession and JSONSerialization.

In Chapter21, you will learn about collection views as you build an interface for Photorama using

UICollectionView and UICollectionViewCell.

In Chapter22 and Chapter23, you will add persistence to Photorama using Core Data. You will store

and load images and associated data using an NSManagedObjectContext.

Chapter24 will walk you through making your applications accessible to more people by adding

VoiceOver information.

ptg18651516

Style Choices

xvii

Style Choices

This book contains a lot of code. We have attempted to make that code and the designs behind it

exemplary. We have done our best to follow the idioms of the community, but at times we have

wandered from what you might see in Apple’s sample code or code you might find in other books. In

particular, you should know up front that we nearly always start a project with the simplest template

project: the single view application. When your app works, you will know it is because of your efforts

– not because of behavior built into the template.

Typographical Conventions

To make this book easier to read, certain items appear in certain fonts. Classes, types, methods,

and functions appear in a bold, fixed-width font. Classes and types start with capital letters, and

methods and functions start with lowercase letters. For example, “In the loadView() method of the

RexViewController class, create a constant of type String.”

Variables, constants, and filenames appear in a fixed-width font but are not bold. So you will see, “In

ViewController.swift, add a variable named fido and initialize it to "Rufus".”

Application names, menu choices, and button names appear in a sans serif font. For example, “Open

Xcode and select New Project... from the File menu. Select Single View Application and then click

Next.”

All code blocks are in a fixed-width font. Code that you need to type in is bold; code that you need

to delete is struck through. For example, in the following code, you would delete the line import

Foundation and type in the two lines beginning @IBOutlet. The other lines are already in the code and

are included to let you know where to add the new lines.

import Foundation

import UIKit

class ViewController: UIViewController {

@IBOutlet var questionLabel: UILabel!

@IBOutlet var answerLabel: UILabel!

}

Necessary Hardware and Software

To build the applications in this book, you must have Xcode 8.1, which requires a Mac running macOS

El Capitan version 10.11.4 or later. Xcode, Apple’s Integrated Development Environment, is available

on the App Store. Xcode includes the iOS SDK, the iOS simulator, and other development tools.

You should join the Apple Developer Program, which costs $99/year, because:

• Downloading the latest developer tools is free for members.

• You cannot put an app in the store until you are a member.

If you are going to take the time to work through this entire book, membership in the Apple Developer

Program is worth the cost. Go to developer.apple.com/programs/ios/ to join.

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