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The iOS Apprentice (Fourth Edition): Beginning iOS Development with Swift 2 They offer you 50% off of the PDF copy but last I checked that would only bring. ebook by matthijs hollemans the ios apprentice (fourth edition): beginning ios development with swift 2 in pdf format, then you've come to the. This week's book release is the iOS Apprentice, Seventh Edition. This is a free update for existing PDF customers, as our way of thanking you for supporting our site. The fourth and final app you'll build: StoreSearch!.
That means what you learn in this book will be extremely useful as you expand your development skills and in your work as an app developer.
The chapters in this section will introduce you to the very basics of programming in Swift. There are several collection types in Swift, but three important ones are arrays, dictionaries and sets.
The collection types have similar interfaces but very different use cases. Swift comes with basic building blocks, but its real power is in the custom things you can build to model parts of your app.
Swift has no idea about playable characters and monsters and power-ups, for example — these are things you need to build yourself! You can create your own type by combining variables and functions into a new type definition.
For example, integers and doubles might not be enough for your purposes, so you might need to create a type to store complex numbers. Or maybe storing first, middle and last names in three independent variables is getting difficult to manage, so you decide to create a FullName type. When you create a new type, you give it a name; thus, these custom types are known as named types.
Structures are a powerful tool for modeling real world concepts. You can encapsulate related concepts, properties and methods into a single, cohesive model.
Swift, in fact, includes four kinds of named types: This is essentially a math machine. It performs addition, subtraction, and other arithmetical operations on numbers. Everything you see when you operate your computer is all built upon a CPU crunching numbers many millions of times per second. Isnt it amazing what can come from just numbers? The CPU stores the numbers it acts upon in small memory units called registers.
The CPU is able to read numbers into registers from the computers main memory, raywenderlich. Its also able to write the number stored in a register back into RAM. This allows the CPU to work with large amounts of data that wouldnt all fit in the bank of registers.
Here is a diagram of how this works: As the CPU pulls values from RAM into its registers, it uses those values in its math unit and stores the results back in another register. Each computer program is usually made up of thousands to millions of instructions.
A complex computer program such as your operating system, macOS yes, thats a computer program too! Its entirely possible to write individual instructions to tell a computer what to do, but for all but the simplest programs, it would be immensely time-consuming and tedious. This is because most computer programs aim to do much more than simple math computer programs let you surf the Internet, manipulate images, and allow you to chat with your friends.
Instead of writing individual instructions, you write code in a specific programming language, which in your case will be Swift. This code is put through a computer program called a compiler, which converts the code into instructions the CPU knows how to execute.
Each line of code you write will turn into many instructions some lines could end up being tens of instructions! Representing numbers As you know by now, numbers are a computers bread and butter, the fundamental basis of everything it does.
Whatever information you send to the compiler will eventually become a number. For example, each character within a block of text is represented by a number.
Youll learn more about this in Chapter 3, which delves raywenderlich. Images are no exception. In a computer, each image is also represented by a series of numbers.
An image is split into many thousands, or even millions, of picture elements called pixels, where each pixel is a solid color. If you look closely at your computer screen, you may be able to make out these blocks. That is unless you have a particularly high-resolution display where the pixels are incredibly small! Each of these solid color pixels is usually represented by three numbers: one for the amount of red, one for the amount of green and one for the amount of blue.
The numbers the CPU works with are notably different from those you are used to. When you deal with numbers in day-to-day life, you work with them in base 10, otherwise known as the decimal system.
Having used this numerical system for so long, you intuitively understand how it works. So that you can you can appreciate the CPUs point of view, consider how base 10 works. By the time you have finished this fourth part in the series, you will have the core skills that it takes to make your own apps, and will be ready to make your own apps and submit them to the App Store!
Best of all, the book comes complete with all source code for the apps in the book.
That way, you can always compare your work to the final product of the authors at ay point in your journey through the book! After many years of handcrafting his logic with if-then-else statements, Matthijs Hollemans finally saw the light and switched to machine learning, teaching computers to come up with those if-then-else statements by themselves.
Why write programs when computers can write their own? Matthijs also lifts heavy things in the gym and plays heavy things on his guitar. Matthijs blogs about iOS machine learning at machinethink.