swift playground tutorial

count). Our framework stack is always based on cocoa. Objective-c Evolution supports blocks, collection literal, and modules, allowing the framework of modern languages to be used without deep access. Thanks to these basic work, the new programming language can be introduced in Apple software development (by Gashero).OBJECTIVE-C developers will feel Swift's déjà vu. Swift uses objective-c named parameters and a dynamic object model. Provides interope

processing. Writing global code is typically used for entry points in a program. You don't need to write a main function, and you don't need to write a comma for each statement as the end. This introductory trip will give you enough information to start writing Swift code, and you can accomplish a lot of programming tasks. In the process if you do not understand some of the content and do not worry, we will be in the other chapters of the book to ex

in Apple software development (by Gashero).OBJECTIVE-C developers will feel Swift's déjà vu. Swift uses objective-c named parameters and a dynamic object model. Provides interoperability with the cocoa framework and the mix-and-match. Based on these fundamentals, Swift introduces a number of new features and a combination of process-oriented and object-oriented features.Swift is also friendly to the new pr

Generally, when we learn a new language, we write a Hello World applet. In swift, we can implement it through a line of content. Println ("Hello, world") // Note: Output HelloWorld If you have written C and OC code, this statement may be very familiar to you. In swift, such a line of code is a complete program, you do not need to import another function library for it, such as input/output or string hand

str1 = "Hello" var str2 = "World" var str = str1 + str2var str2 = "\ (str1) HWC and the \ (str2)"//hello HWC and the world6 uppercase and lowercase conversionsStr.uppercasestring//hello World str.lowercasestring//hello World7 prefix suffix equalsBool Hasprefix (prefix:string)Bool Hassuffix (suffix:string)var str = "Hello HWC" str.hasprefix ("Hello")//truestr.hassuffix ("123")//falsevar str1 = "Jack"if str = = str1{println ("Equal")}8 processing substringsvoid Insert (NEWELEMEMT:CHARACTER,ATIND

http://www.imooc.com/learn/127"Fun to Swift" Web tutorial notes, you have updated according to the syntax of 2.1.I.1. Learn and familiarize yourself with the features of swift language through playground.2. A tuple declaration can have a name for each meta, which can then be used. Accessvar t= (x:1, y:2, Z:"hi") // v

in Apple software development (by Gashero).OBJECTIVE-C developers will feel Swift's déjà vu. Swift uses objective-c named parameters and a dynamic object model. Provides interoperability with the cocoa framework and the mix-and-match. Based on these fundamentals, Swift introduces a number of new features and a combination of process-oriented and object-oriented features.Swift is also friendly to the new pr

), \ (Somepoint.1)) is outside of the box ")}The branch statement of a case can add additional judgment by whereLet Somepoint = (1, 1) switch somepoint {box let (x, y) where x = = Y:println ("x is equal to Y") default:println ("X is not equ Al to Y ")}5 Continue break Fallthrough returnContinue, terminates this operation in the loop body and continues the next operationFor index in 1...10{ if index% 2 = = 1{continue } println (Index)}Break to immediately end the execution of the current co

Swift and objective-c A concise tutorial for mixingReprinted from: HTTPS://GITHUB.COM/LIFEDIM/SWIFTCASTS/TREE/MASTER/000_MIX_SWIFT_OBJCI think many iOS developers know Swift, the biggest problem in the mind is how to apply Swift to the original project. Below I will briefly describe the mix of these 2 languages, which

IOS8 Development Video Tutorial: Based on Swift combat UI from beginner to proficient (5 major projects, in-depth analysis handle Group purchase project)Course Lecturer: Zhu QiwenCourse Category: IOSSuitable for people: BeginnerNumber of lessons: 81 hoursUsing the technology: Swift, IOS8Projects involved: Mobile picture case, picture Show case, Tom Cat case, hand

Summary:Developers may be familiar with some of the more well-known open source cocoapods frameworks, but sometimes they may not be able to find a pod that just satisfies their needs, and this article explains in detail how to use Swift to create a cocoapods process.This article is from: Raywenderlich, translation: Development technology Front, translator: Mrloong You might be familiar with some well-known, open-source cocoapods frameworks, such as Al

guarantees that the object is not freed in memory, when its reference count is 1. The ⑩ line Code REF2 = Ref1 is to assign a reference to the object to Ref2,ref2 and to establish a "strong reference" relationship with the object, when its reference count is 2. The first line of code REF3 = Ref1 is to assign a reference to an object to REF3,REF3 also to establish a "strong reference" relationship with the object, when its reference count is 3.The reference count of the employee object is then br

)))//llo wo 5 string concatenation Very simple answer, with a plus + or string interpolation var str1 = "hello" var str2 = "world" var str = str1 + str2 var str2 = "\(str1) hwc and the \(str2)" //hello hwc and the world 6 Case Conversion str.uppercaseString //HELLO WORLD str.lowercaseString //hello world 7 prefix suffix equals Bool Hasprefix (prefix:string) Bool Hassuffix (suffix:string) var str = "hello hwc" str.hasPrefix("hello") //true str.hasSuffix("123")

of the employee object is then broken by the REF1 = Nil statement in the code line, when it is referenced by 2. And so on, Ref2 = nil when its reference count is 1,REF3 = nil when its reference count is 0, when the reference count is 0, the employee object is freed.We can test to see the effect, if you set a breakpoint to step through debugging, you will find that the code runs out of line ⑨ after the console output:Employee Blake has been constructed successfully.The contents of the destructor

Original blog, reproduced please indicate the sourceHttp://blog.csdn.net/column/details/swift-hwc.htmlI. Definition of extension (extensions)An extension is the addition of new functionality to an existing class, struct, or enumeration. The extension does not need to obtain the source code of the original class.The extension is similar to the categories in Objective CExtensions can add features that include1. Calculating properties and calculating sta

Http://www.raywenderlich.com/76024/swift-table-view-animations-tutorial-drop-cardsStandard table view is a powerful and flexible way to render data, and in most cases your app uses some form of table view. However, one drawback is that you can't make too many customizations, and your app will drown in thousands of similar apps.In order to not use the same table view, we can use some animations to make your