By Paris Buttfield-Addison, Jonathon Manning, Tim Nugent
Able to construct apps for iPhone, iPad, and Mac now that quick has landed? If you're an skilled programmer who's by no means touched Apple developer instruments, this hands-on booklet indicates you the way to take advantage of the rapid language to make very good iOS and OS X apps, utilizing Cocoa and Cocoa Touch.
Learn tips on how to use rapid in quite a lot of real-world occasions, with Cocoa positive factors resembling occasion equipment and center Animation. You'll choose up fast language positive aspects and syntax alongside the best way, and comprehend why utilizing speedy (instead of Objective-C) makes iOS and Mac app improvement more uncomplicated, speedier, and more secure. You'll additionally paintings with numerous routines that can assist you perform as you learn.
* examine the OS X and iOS program lifecycle
* Use storyboards to layout adaptive interfaces
* discover snap shots platforms, together with the integrated second and 3D video game frameworks
* show video and audio with AVFoundation
* shop facts in the neighborhood with the dossier approach, or at the community with iCloud
* show lists or collections of information with desk perspectives and assortment views
* construct apps that allow clients create, edit, and paintings with documents
* Use MapKit, middle position, and middle movement to engage with the world
Read or Download Swift Development with Cocoa: Developing for the Mac and iOS App Stores PDF
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Extra resources for Swift Development with Cocoa: Developing for the Mac and iOS App Stores
Example text
To sort an array so that small numbers go before large numbers, you can do this: var numbers = [2,1,56,32,120,13] var numbersSorted = sorted(numbers, { (n1: Int, n2: Int) -> Bool in // Sort so that small numbers go before large numbers Functions and Closures | 39 return n2 > n1 }) // = [1, 2, 13, 32, 56, 120] A closure, like a function, takes parameters. In the preceding example, the closure specifies the name and type of the parameters that it works with. However, you don’t need to be quite so verbose—the compiler can infer the type of the parameters for you, much like how it can with variables.
When you define a function that returns a type, you must indicate the type of the data that it returns, by using the arrow (->) symbol: func secondFunction() -> Int { return 123 } secondFunction() You can pass parameters to a function, which it’s able to use to do work. When you define parameters for a function, it is also necessary to define the type of those parameters: func thirdFunction(firstValue: Int, secondValue: Int) -> Int { return firstValue + secondValue } thirdFunction(1, 2) A function can return a single value, as we’ve already seen, but they can also return multiple values, in the form of a tuple.
If you’re pressed for screen space or simply want less clutter, you can quickly summon and dismiss these parts of the screen by clicking each of the elements. The navigator The lefthand side of the Xcode window is the navigator, which presents information about your project (Figure 1-6). Figure 1-6. The navigator pane 10 | Chapter 1: Cocoa Development Tools The navigator is divided into eight tabs, from left to right: • The project navigator gives you a list of all the files that make up your project.