Advanced iOS 4编程：苹果移动应用开发指南

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"Advanced.iOS.4.Programming.pdf - 一本由Maher Ali博士编写的书籍，专注于在苹果的iPhone、iPad和iPod touch上开发移动应用程序的高级iOS 4编程技术。该书由John Wiley and Sons Ltd.出版，首次出版于2010年。" 该书"Advanced iOS 4 Programming"深入探讨了iOS 4平台上的应用程序开发，为开发者提供了全面的指导和技巧。以下是基于书中的部分内容可能涵盖的一些关键知识点： 1. **Objective-C和Xcode**：作为iOS开发的基础，书中可能详细介绍了Objective-C语言，包括面向对象编程的概念、内存管理（如ARC）以及如何使用Xcode IDE进行项目设置和调试。 2. **UI设计和Storyboard**：可能会讲解如何使用Interface Builder创建用户界面，包括使用Auto Layout进行布局，以及Storyboard文件的管理，以实现不同屏幕尺寸和设备之间的适配。 3. **多线程和Grand Central Dispatch (GCD)**：书中可能详细解释了如何在iOS应用中实现多任务处理，利用GCD来提高性能并优化用户体验。 4. **Core Data**：作为iOS数据持久化的重要框架，可能会深入讨论Core Data模型设计、实体关系、查询语言（NSPredicate）以及事务处理。 5. **网络编程**：包括HTTP请求、JSON解析、URLSession和第三方库如AFNetworking的使用，以便实现与服务器的通信。 6. **地理位置服务**：可能会讲解Core Location框架，用于获取用户的当前位置，实现地图集成和定位服务。 7. **多媒体处理**：如使用AVFoundation框架处理音频和视频内容，包括播放、录制和编辑。 8. **推送通知**：包括设置Apple Push Notification Service (APNs)、处理通知的生命周期和在应用中集成通知功能。 9. **动画和Core Animation**：如何使用CALayer进行视图动画，以及复杂的动画效果的实现。 10. **测试和性能优化**：涵盖单元测试、集成测试，以及使用Instruments工具进行性能分析和优化。 11. **App Store提交流程**：介绍App Store Connect的使用，包括应用版本管理、审核流程和发布策略。 12. **安全性**：涉及数据加密、安全存储用户信息、防止逆向工程等方法。 13. **iOS 4的新特性**：书中会特别强调iOS 4版本引入的新功能和改进，帮助开发者充分利用这些更新。通过阅读这本书，开发者可以提升自己的iOS开发技能，学习如何构建高效、稳定且用户体验优秀的应用程序。书中提供的实例代码和最佳实践将有助于读者将理论知识转化为实际项目经验。

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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