codecademy swift

message is \(http404Error.1)")// prints "The status message is Not FoundWhen defining a tuples, you can name the values in the tuples so that the values can be obtained using the values: let http200Status = (statusCode: 200, description: "OK")println("The status code is \(http200Status.statusCode)")// prints "The status code is 200"println("The status message is \(http200Status.description)")// prints "The status message is OKBy the way, a very useful part of a tuples is that they can be used

This article turns fromhttp://www.helloswift.com.cn/swiftbase/2015/0112/3469.htmlIOS OC and Swift mixed 1, create a swift or OC project: I'm here to create the Swift language project, project name Swifttest2, in the Project code directory to create a OC class, select the OC Language, a dialog box, select Yes3, this will be in the project to see such a header file

Swift is a new development language for Apple in this WWDC conference, and the developer's website has released the introduction, tutorials and manuals for the new language, and if you have an iOS device in hand, search for Swift from its official bookstore via Apple's ibooks app, An ebook version of its Official handbook can be downloaded.Why is Apple launching a new language? Personal humble opinion, now

Swift class, inheritance, interface, swift class inheritance Interface Import Foundationclass Hello {var _ name: String? = "Swift global" init (name: String) {// constructor with parameters in the definition class _ name = name; println ("Hello, \ (name )");} init () {// constructor without parameters in the definition class println ("this is init method");} func

Flappybird mini-game with SwiftWith Apple's deep-dive approach to swift, Swift's quick fire and Swift's streamlined syntax and powerful features, it's also necessary to learn about Swift for developers who use OBJECT-C to develop iOS. This blog skips Swift's dry grammar and starts using swift directly from a small game project, summarizing the gains as follows: F

Structs and enumerations can also define methods in swift, whereas in Objective-c, a class is the only type that can define a method.　　Instance methodAn instance method is a method that belongs to a particular class, struct, or instance of an enumeration type that provides access to and modify instance properties, and the syntax of the instance method is exactly the same as the function. An instance method can implicitly access all other instance meth

Conversion Between Swift numeric types, Swift numeric type conversionConversion Between Swift numeric types Swift is a secure language that requires strict type checks and cannot be converted between different types.1. Integer ConversionIn other languages such as C and Objective-C, there are two conversion methods betw

Unlike other programming languages, Swift does not require you to create separate interfaces and implementation files for your custom classes and structs. All you have to do is define a class or struct in a single file, and the system will automatically generate external interfaces for other code.　　Note: Typically an instance of a class is called an object. However, in swift, classes and structs are more cl

Yesterday tried to write code after the feeling write than just a lot, so today wrote a bit of things, mainly the properties of the class, as well as inheritance and xib some knowledge, but also encountered a lot of trouble, but fortunately have been solved, here simply write the code today, there is nothing wrong place, or hope to come.First look at the first simple page: Click the second button, the view changes color below, click the first button, modal a pageThe first is some of the properti

Standalone installation of OpenStack componentsPrepare the server and add 3 additional hard drives to the server that is installing OpenStackQemu-img create-f qcow2 rh71.img 20GQemu-img create-f qcow2 rh71.img 20GQemu-img create-f qcow2 rh71.img 20GKeystone IntroductionKeystone is an important part of the OpenStack framework, responsible for identity authenticationService management, service rules, and service token capabilities that enable OpenStack's identity APIKeystone is the registry in the

1. Prepare the environmentVersion 1.1Linux: Ubuntu Server 12.04.1 LTS; Swift version: 1.0 (installed later ); Python version: 2.7.3 (later installation ); Python-swiftclient version: 1.3.0 (installed later ). Summary of the installation and testing of a single Swift node in Ubuntu 1.2 node IPProxy Node IP: 172.17.10.14; Storage Node 1 IP: 172.17.10.10 (with 2 2 TB Storage devices ); Storage Node 2 IP: 172.1

Wen/mango_to (author of Jane's book)Original link: http://www.jianshu.com/p/dc80e290806fObjectiveSwift 3 will meet with you later this year, which will bring huge changes to the code level for swift developers.If you haven't recently followed the pace of swift evolution, you may ask what the changes are, how it will affect your code, and when you should move to Swift