iOS 8 Programming Fundamentals with Swift: Swift, Xcode, and - download pdf or read online

By Matt Neuburg

ISBN-10: 1491908904

ISBN-13: 9781491908907

Circulate into iOS improvement through getting an organization snatch of its basics, together with the Xcode IDE, the Cocoa contact framework, and Swift—Apple's new programming language. With this completely up to date consultant, you'll study Swift's object-oriented options, know how to take advantage of Apple's improvement instruments, and observe how Cocoa presents the underlying performance iOS apps have to have.

* discover Swift's object-oriented techniques: variables and capabilities, scopes and namespaces, item forms and instances
* get to grips with integrated fast forms resembling numbers, strings, levels, tuples, Optionals, arrays, and dictionaries
* how you can claim, instantiate, and customise fast item types—enums, structs, and classes
* observe robust rapid positive factors resembling protocols and generics
* travel the lifecycle of an Xcode undertaking from inception to App Store
* Create app interfaces with nibs and the nib editor, Interface Builder
* comprehend Cocoa's event-driven version and its significant layout styles and features
* learn how speedy communicates with Cocoa's C and Objective-C APIs

Once you grasp the basics, you'll have the ability to take on the main points of iOS app improvement with writer Matt Neuburg's significant other consultant, Programming iOS 8.

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Extra info for iOS 8 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics

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Self | 19 It turns out that every use of the word self I’ve just illustrated is completely optional. You can omit it and all the same things will happen: class Dog { var name = "" var whatADogSays = "woof" func bark() { println(whatADogSays) } func speak() { bark() } } The reason is that if you omit the message recipient and the message you’re sending can be sent to self, the compiler supplies self as the message’s recipient under the hood. However, I never do that (except by mistake). As a matter of style, I like to be explicit in my use of self.

WhatADogSays) } } Here, other objects can come along and change my property whatADogSays. Since that property is used by both bark and speak, we could easily end up with a Dog that, when told to bark, says "meow". bark() // meow You might reply: Well, silly, why did you declare whatADogSays with var? Declare it with let instead. Make it a constant! whatADogSays) } } That is a good answer, but it is not quite good enough. There are two problems. whatADogSays. Then whatADogSays has to be a var; otherwise, even the instance itself can’t change it.

The reason overloading works is that Swift has strict typing. A String is not an Int. Swift can tell them apart in the declaration, and Swift can tell them apart in a function call. Thus, Swift knows unambiguously that say("what") is different from say(1). It is also legal to have two functions with the same signature but different external parameter names: func say (what:String) { } func say (# what:String) { } But that’s not really a case of overloading; the functions have different external parameter names, so they are simply two different functions with two different names.

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iOS 8 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics by Matt Neuburg

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