Advanced iOS Programming for iPhone, iPad and iPod touch

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"ios 高级编程，探索苹果设备的移动应用开发" 在《ios 高级编程》这本书中，作者Maher Ali，一位来自贝尔实验室的博士，深入探讨了为Apple iPhone、iPad以及iPod touch开发移动应用的专业知识。这本书的首次出版是在2010年，由John Wiley and Sons Ltd.出版，它提供了一个详尽的指南，帮助开发者提升在iOS平台上的编程技能。本书的核心内容可能包括以下几个关键知识点： 1. **Objective-C和Swift编程语言**：作为iOS开发的基础，书中可能会详细介绍Objective-C，当时主流的编程语言，以及Swift，苹果后来推出的现代化语言，它们的语法特性、面向对象编程原则以及如何使用它们构建iOS应用。 2. **Cocoa Touch框架**：Cocoa Touch是iOS应用开发的重要组成部分，书中会涵盖其基本概念，如用户界面设计、事件处理、手势识别等，这些都是创建用户交互体验的关键。 3. **Core Data**：苹果的持久化框架Core Data可能有详尽的讲解，包括模型管理、数据存储、关系映射以及如何在应用中有效地使用它来保存和检索数据。 4. **多线程与异步编程**：在iOS应用中，多线程和异步编程是提高性能和用户体验的关键。书里可能会讨论GCD(Grand Central Dispatch)和其他并发技术的使用。 5. **网络编程**：包括HTTP请求、JSON解析、URLSession的使用，以及如何实现网络连接和数据交换。 6. **推送通知**：介绍如何集成Apple Push Notification服务，以实现应用的实时消息推送。 7. **地图和定位服务**：利用Core Location框架和MapKit框架，开发者可以学习如何在应用中集成地图功能和获取用户位置信息。 8. **测试和调试**：书中可能会涵盖单元测试、UI测试以及Xcode集成的调试工具的使用方法。 9. **App Store发布流程**：包括应用的版本控制、App Store Connect的使用、应用审核过程和发布策略。 10. **性能优化**：讲解内存管理、性能分析工具的使用，以及如何优化代码以提升应用性能和电池寿命。此外，书中可能还涉及到了软件工程的最佳实践，如代码组织、设计模式以及持续集成和持续部署(CI/CD)的概念，这些对于专业iOS开发者来说都是至关重要的。《ios 高级编程》是一本全面覆盖iOS开发高级主题的书籍，对于希望深入理解iOS平台并提升开发技能的程序员来说，是一份宝贵的资源。

Preface

Welcome to Advanced iOS 4 Programming, a text that targets the development of mobile applications

on devices (such as the iPhone, iPad, and iPod touch) running the iOS 4 operating system.

This text covers a wide variety of essential and advanced topics, including

• The Objective-C programming language and runtime

• Collections

• Cocoa Touch

• Interface Builder

• Building advanced mobile user interfaces

• Core Animation and Quartz 2D

• Model-view-controller (MVC) designs

•Table views

•Core Data

• Developing for the iPad

• Grand Central Dispatch

• File management

• Parsing XML documents using SAX, DOM, and TouchXML

• Working with the Map Kit API

• Remote and local push notiﬁcation

• Multitasking

• Working with the address book

• Consuming RESTful web services

• Blocks (closures) in Objective-C

• Building advanced location-based applications

• Developing database applications using the SQLite engine

• Cut, copy, and paste

xvi Preface

Italic type is used for

• New terms and concepts when they are introduced

• Specifying emphasis in text

Organization

Chapter 1 This chapter serves as a quick introduction to the tools bundled with the SDK. It also

shows you the basic development phases, including coding, UI design, and debugging.

Chapter 2 This chapter presents the main features of the Objective-C language under the Cocoa

environment. We introduce the main concepts behind classes in Objective-C. You will learn

how to declare a new class, deﬁne it, and use it from within other classes. You will also be

exposed to important Cocoa classes and data types. You will learn about memory management

in iOS4. You will learn how to create new objects as well as how to deallocate them. You will

also learn about your responsibility when obtaining objects from Cocoa frameworks or other

frameworks. We also introduce the topic of Objective-C protocols. You will learn how to adopt

protocols and how to declare new ones as well. This chapter also covers language features

such as properties, categories, and posing. Exceptions and error handling techniques are both

covered in this chapter, and you will be exposed to the concept of key-value coding (KVC).

You will also learn about blocks, how to utilize multithreading (including Grand Central

Dispatch), and use notiﬁcations, and will be exposed to the Objective-C runtime system.

Chapter 3 This chapter addresses the topic of collections in Cocoa. It discusses arrays, sets, and

dictionaries. You will learn about immutable and mutable collections, the different approaches

used for copying collections, and several sorting techniques.

Chapter 4 In this chapter, we discuss the basic steps needed to build a simple iPhone application.

First, we demonstrate the basic structure of a simple iPhone application and then we show the

steps needed to develop the application using XCode.

Chapter 5 This chapter explains the main concepts behind views. You will learn about view

geometry, view hierarchy, the multitouch interface, animation, and basic Quartz 2D drawing.

Chapter 6 In this chapter, you will learn about the base class for all controls,

UIControl,and

the important target-action mechanism. This chapter also presents several important graphical

controls that can be used in building attractive iPhone applications.

Chapter 7 In this chapter, you will learn about the available view controllers that are provided

to you in the iPhone SDK. Although you can build iPhone applications without the use of

these view controllers, you shouldn’t. As you will see in this chapter, view controllers greatly

simplify your applications. This chapter provides a gentle introduction to view controllers.

After that, detailed treatment of tab-bar controllers, navigation controllers, and modal view

controllers is provided.

Preface xvii

Chapter 8 In this chapter, we present several important subclasses of the UIView class. We discuss

picker views and show how they can be used for item selection. We investigate progress views

and also talk about activity indicator views. After that, we show how to use scroll views in

order to display large views. Next, we present text views used in displaying multiline text.

After that, we show how to use alert views for the display of alert messages to the user. Similar

to alert views are action sheets, which are also discussed. We also deal with several aspects of

web views.

Chapter 9 This chapter will take you on a step-by-step journey through the world of table views. We

start by presenting an overview of the main concepts behind table views. After that, we present

a simple table view application and discuss the mandatory methods you need to implement

in order to populate and respond to users’ interactions with the table view. We show how

easy it is to add images to table rows. We introduce the concept of sections and provide a

table view application that has sections, with section headers and footers. We introduce the

concept of editing a table view. An application that allows the user to delete rows is presented

and the main ideas are clariﬁed. We address the insertion of new rows in a table view. An

application is discussed that presents a data entry view to the user and adds that new data

to the table’s rows. We continue our discussion of editing mode and present an application

for reordering table entries. The main concepts of reordering rows are presented. We discuss

the mechanism for presenting hierarchical information to the user. An application that uses

table views to present three levels of hierarchy is discussed. We deal with grouped table views

through an example. After that, we present the main concepts behind indexed table views.

Next, we present a dynamic table view controller class that can be used to show cells with

varying heights. Finally, we address the issue of turning the text color to white when a custom

cell is selected.

Chapter 10 This chapter covers the topic of ﬁle management. Here, you will learn how to use both

high- and low-level techniques for storing and retrieving ﬁle data. First, we talk about the

Home directory of the application. Next, we show how to enumerate the contents of a given

directory using the high-level methods of

NSFileManager. You will learn more about the

structure of the

Home directory and where you can store ﬁles. After that, you will learn how to

create and delete directories. Next, we cover the creation of ﬁles. We also cover the topic of

ﬁle and directory attributes. You will learn how to retrieve and set speciﬁc ﬁle and directory

attributes in this chapter. We also demonstrate the use of application bundles and low-level ﬁle

access.

Chapter 11 In this chapter, we will cover the basics of the SQLite database engine that is available

to you in the iPhone SDK. SQLite is an embedded database in the sense that there is no server

running, and the database engine is linked to your application. First, we describe basic SQL

statements and their implementation using SQLite function calls. Second, we discuss handling

of result sets generated by SQL statements. Third, we address the topic of prepared statements.

Fourth, we talk about extensions to the SQLite API through the use of user-deﬁned functions.

Finally, we present a detailed example for storing and retrieving BLOBs.

Chapter 12 In this chapter, you will learn how to effectively use XML in your iPhone application.

The chapter follows the same theme used in other chapters and exposes the main concepts

xviii Preface

through a working iPhone application: an RSS feed reader. First, we explain the main concepts

behind XML and RSS. Next, we present a detailed discussion of DOM and SAX parsing. After

that, we present a table-based RSS reader application. Finally, we provide a summary of the

main steps you need to take in order to effectively harness the power of XML from within

your native iPhone applications.

Chapter 13 In this chapter, we will address the topic of location awareness. First, we will talk

about the Core Location framework and how to use it to build location-aware applications.

After that, we will discuss a simple location-aware application. Next, we cover the topic of

geocoding. You will learn how to translate postal addresses into geographical locations. You

will also learn how to sample movement of the device and display that information on maps.

Next, we discuss how to relate zip codes to geographical information. Finally, we show you

how to utilize the Map Kit API to add an interactive map to your view hierarchy.

Chapter 14 In this chapter, we demonstrate the use of the several devices available on the iPhone.

We discuss the use of the accelerometer, show how to play small sound ﬁles, and show

how to play video ﬁles. After that, we discuss how to obtain iPhone and iPod touch device

information. Using the built-in camera and the photo library are also discussed in this chapter.

After that, we show you how to obtain state information regarding the battery of the device.

Finally, we discuss the proximity sensor.

Chapter 15 In this chapter, we start by looking at a step-by-step procedure for localizing strings for

a set of supported languages. Next, we look at date formatting. After that, we cover formatting

currencies and numbers. Finally, we discuss how to generate a sorted list of countries.

Chapter 16 In this chapter, we show how to marry various UI components and build custom

reusable ones. First, we show how to build an alert view with a text ﬁeld in it. Next, we

present a table view inside an alert view. Finally, we show how to build a progress alert view.

Chapter 17 This chapter addresses several advanced networking topics. We start by looking at

how we can determine network connectivity of the device. After that, we tackle the issue

of uploading multimedia content (e.g., photos) to remote servers. Next, we present a category

NSString that allows you to easily compute the MD5 digest of a string. This is important

as some services, such as Flickr, require posting parameters with the appropriate signature.

After that, we show you how to present a responsive table view whose data rows are fed

from the Internet without sacriﬁcing the user experience. Next, we address the topic of remote

and local push notiﬁcations. After that, we tackle some aspects of multitasking and use it in

downloading a large ﬁle after the application is suspended. Finally, we discuss sending email

from within an iPhone application.

Chapter 18 In this chapter, we discuss the foundation of the address book API and several

UI elements that can be used to modify the contacts database. First, we provide a brief

introduction to the subject. Next, we discuss property types. After that, we show how to access

single-value and multivalue properties. Next, we go into the details of the person record and

the address book. Issues related to multithreading and identiﬁers are then addressed. After

covering the foundation of the address book API, we provide several sample applications.

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