The iOS Apprentice 第六版：PDF 教程

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"iOS Apprentice v6.0 PDF 是一本由 Ray Wenderlich 出品的针对初学者的 iOS 开发必读书籍，第六版内容涵盖了最新的 iOS 开发技术。" iOS Apprentice 第六版是一本深入浅出的教程，旨在帮助新手入门 iOS 开发。这本书由 Fahim Farook 和 Matthijs Hollemans 编写，版权归属于 Razeware LLC。在开始阅读之前，读者需要注意书中的权益声明：未经版权所有者事先书面许可，不得复制或分发本书的任何部分，包括文本、图像或源代码。同时，作者和版权所有者对书中提供的内容不提供任何明示或暗示的保证，包括但不限于适用于特定目的的适销性和适用性保证。他们对因软件或其使用或交易产生的任何索赔、损害或其他责任概不负责，无论这些情况是基于合同、侵权还是其他原因。书中的商标均归各自所有者所有，尊重知识产权是非常重要的。购买 iOS Apprentice 后，读者将获得以下授权：可以无限制地在多个应用程序中使用和/或修改书中提供的源代码，但需遵守一定的条件。通过这本书，读者将学习到iOS应用的基础构建，如界面设计、Swift编程语言、Xcode集成开发环境的使用、Core Data 数据持久化、网络请求、动画效果以及App Store的发布流程等关键知识点。每个章节通常会通过实际项目引导，使理论知识与实践相结合，让学习过程更加直观易懂。此外，书中可能还会涉及Apple的最新框架和技术，如UIKit的更新、Swift语言的最新特性，以及如何遵循Apple的设计指南来创建高质量的应用程序。通过iOS Apprentice，读者不仅能掌握基础的iOS开发技能，还能了解到如何构建专业、用户体验良好的iOS应用。对于想要踏入iOS开发领域的初学者来说，iOS Apprentice v6.0 是一本非常宝贵的资源，它以实践为导向，结合理论知识，为读者提供了全面且易于理解的学习路径。

Chapter 1: Introduction

Hi, welcome to The iOS Apprentice: Beginning iOS Development with Swift, Sixth Edition,

the swiftest way (pardon the pun) to iOS development mastery!

In this book you'll learn how to make your own iPhone and iPad apps using Apple’s

Swift 4.0 programming language (and Xcode 9), by building four interesting iOS apps.

The apps you’ll be making in The iOS Apprentice

Everybody likes games, right? So, you’ll start by building a simple but fun iPhone game

named Bull’s Eye. It will teach you the basics of iPhone programming, and the other

apps will build on what you learn there.

Taken together, the four apps you'll build cover everything you need to know to make

your own apps. By the end of the book you’ll be experienced enough to turn your ideas

into real apps that you can put on the App Store!

raywenderlich.com

Even if you’ve never programmed before or if you’re new to iOS, you should be able to

follow along with the step-by-step instructions and understand how these apps are

made. Each chapter has a ton of illustrations to prevent you from getting lost. Not

everything might make sense right away, but hang in there and all will become clear in

time.

Writing your own iOS apps is a lot of fun, but it’s also hard work. If you have the

imagination and perseverance, there is no limit to what you can make your apps do. It is

my sincere belief that this book can turn you from a complete newbie into an

accomplished iOS developer, but you do have to put in the time and effort. By writing

this book, I’ve done my part. The rest is up to you…

About this book

The iOS Apprentice will help you become an excellent iOS developer, but only if you let

it. Here are some tips that will help you get the most out of this book.

Learn through repetition

You’re going to make several apps in this book. Even though the apps will start out

quite simple, you may ﬁnd the instructions hard to follow at ﬁrst – especially if you’ve

never done any computer programming before – because I will be introducing a lot of

new concepts.

It’s OK if you don’t understand everything right away, as long as you get the general

idea. As you proceed through the book, you’ll go over many of these concepts again and

again until they solidify in your mind.

Follow the instructions yourself

It is important that you not just read the instructions but also actually follow them.

Open Xcode, type in the source code fragments, and run the app in the Simulator. This

helps you to see how the app gets built step by step.

Even better, play around with the code and with the Xcode settings. Feel free to modify

any part of the app and see what the results are - make a small change to the code and

see how it affects the entire app. Experiment and learn! Don’t worry about breaking

stuff – that’s half the fun. You can always ﬁnd your way back to the beginning. But

better still, you might even learn something from simply breaking the code and

learning how to ﬁx it.

iOS Apprentice Chapter 1: Introduction

raywenderlich.com

Donʼt panic – bugs happen!

You will run into problems, guaranteed. Your programs will have strange bugs that will

leave you stumped. Trust me, I’ve been programming for 30 years and that still happens

to me too. We’re only humans and our brains have a limited capacity to deal with

complex programming problems. In this book, I will give you tools for your mental

toolbox that will allow you to ﬁnd your way out of any hole you have dug for yourself.

Understanding beats copy-pasting

Too many people attempt to write iOS apps by blindly copy-pasting code that they ﬁnd

on blogs and other websites, without really knowing what that code does or how it

should ﬁt into their program.

There is nothing wrong with looking on the web for solutions – I do it all the time – but

I want to give you the tools and knowledge to understand what you’re doing and why.

That way you’ll learn quicker and write better programs.

This is hands-on practical advice, not a bunch of dry theory (although we can’t avoid

some theory). You are going to build real apps right from the start and I’ll explain how

everything works along the way, with lots of pictures that illustrate what is going on.

I will do my best to make it clear how everything ﬁts together, why we do things a

certain way, and what the alternatives are.

Do the exercises

I will also ask you to do some thinking of your own – yes, there are exercises! It’s in your

best interest to actually do these exercises. There is a big difference between knowing

the path and walking the path… And the only way to learn programming is to do it.

I encourage you to not just do the exercises but also to play with the code you’ll be

writing. Experiment, make changes, try to add new features. Software is a complex piece

of machinery and to ﬁnd out how it works you sometimes have to put some spokes in

the wheels and take the whole thing apart. That’s how you learn!

Have fun!

Last but not least, remember to have fun! Step by step you will build up your

understanding of programming while making fun apps. By the end of this book you’ll

have learned the essentials of Swift and the iOS development kit. More importantly, you

should have a pretty good idea of how everything goes together and how to think like a

programmer.

iOS Apprentice Chapter 1: Introduction

raywenderlich.com

It is my aim that by the time you reach the end of the book you will have learned

enough to stand on your own two feet as a developer. I am conﬁdent that eventually

you’ll be able to write any iOS app you want as long as you get those basics down. You

still may have a lot to learn, but when you’re through with The iOS Apprentice, you can

do without the training wheels.

Who this book is for

This book is great whether you are completely new to programming, or whether you

come from a different programming background and are looking to learn iOS

development.

If you’re a complete beginner, don’t worry – this book doesn’t assume you know

anything about programming or making apps. Of course, if you do have programming

experience, that helps. Swift is a new programming language but in many ways it’s

similar to other popular languages such as PHP, C#, or JavaScript.

If you’ve tried iOS development before with the old language, Objective-C, then its low-

level nature and strange syntax may have put you off. Well, there’s good news: now that

we have a modern language in Swift, iOS development has become a lot easier to pick

up.

It is not my aim with this book to teach you all the ins and outs of iOS development.

The iOS SDK (Software Development Kit) is huge and there is no way we can cover

everything. Fortunately, we don’t need to. You just need to master the essential

building blocks of Swift and the iOS SDK. Once you understand these fundamentals,

you can easily ﬁnd out by yourself how the other parts of the SDK work and learn the

rest on your own terms.

The most important thing I’ll be teaching you, is how to think like a programmer. That

will help you approach any programming task, whether it’s a game, a utility, a mobile

app that uses web service, or anything else you can imagine.

As a programmer you’ll often have to think your way through difﬁcult computational

problems and ﬁnd creative solutions. By methodically analyzing these problems you

will be able to solve them, no matter how complex. Once you possess this valuable skill,

you can program anything!

iOS Apprentice Chapter 1: Introduction

raywenderlich.com

iOS 11 and better only

The code in this book is aimed exclusively at iOS version 11 and later. Each new release

of iOS is such a big departure from the previous one that it just doesn’t make sense

anymore to keep developing for older devices and iOS versions. Things move fast in the

world of mobile computing!

The majority of iPhone, iPod touch, and iPad users are pretty quick to upgrade to the

latest version of iOS anyway, so you don’t need to be too worried that you’re leaving

potential users behind.

Owners of older devices, such as the iPhone 4S, iPhone 5, or the ﬁrst iPads, may be

stuck with older iOS versions but this is only a tiny portion of the market. The cost of

supporting these older iOS versions for your apps is usually greater than the handful of

extra customers it brings you.

It’s ultimately up to you to decide whether it’s worth making your app available to users

with older devices, but my recommendation is that you focus your efforts where they

matter most. Apple as a company always relentlessly looks towards the future – if you

want to play in Apple’s backyard, it’s wise to follow their lead. So back to the future it is!

What you need

It’s a lot of fun to develop for the iPhone and iPad, but like most hobbies (or

businesses!) it will cost some money. Of course, once you get good at it and build an

awesome app, you’ll have the potential to make that money back many times.

You will have to invest in the following:

iPhone, iPad, or iPod touch. I’m assuming that you have at least one of these. iOS 11

runs on the following devices: iPhone 5s or newer, iPad 5th generation or newer, iPad

mini 2 or newer, 6th generation iPod touch - basically any device which has a 64-bit

processor. With iOS 11, Apple dropped support for 32-bit processors and apps. If you

have an older device, then this is a good time to think about getting an upgrade. But

don’t worry if you don’t have a suitable device: you can do most of your testing on the

Simulator.

Note: Even though I mostly talk about the iPhone in this book, everything I say

applies equally to the iPad and iPod touch. Aside from small hardware differences,

they all use iOS and you program them in exactly the same way. You should also

iOS Apprentice Chapter 1: Introduction

raywenderlich.com

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