coursera swift programming

In Swift, the protocol can not only define methods and properties, but also the protocol can be extended, the most important is that in the extension of the protocol can be added to some of the default implementation of the method, that is, in the method of the protocol can implement some logic, because of this feature, Swift can be protocol-oriented programming.Extended protocols and default implementation

Use Map,Filter,Reduce to Array, dictionary, and other collection types in the Swift language (collection Type) may not be a habit for some people. For developers who have not been exposed to functional programming, the first reaction to processing data in a collection type may be to use a for in traversal. This article describes some of the new methods that can be used in swift.MapThe Map function iterates

Catalog IndexBreeze Annotated-swift programming languagePoint 11.Numeric type literalcode Example: - // decimalBinaryinteger = 0b10001 // binaryoctalinteger = 0o21 // Eight- binary 0x11 // 16 binaryAnnotations: The integer number of polygons can be written: decimal number, no prefix, binary number, prefix is 0b, octal number, prefix is 0o, hexadecimal number, prefix is 0x.

Hello everyone, I am the old town, this period of time at home and work happened a lot of things, so for a long time have not come out to engage in any little gestures. Over the next period of time I will make a few columns about the use of swift animation programming video, Hope and everyone's appetite.In the world of iOS, many applications have similar colors and similar typography. Even if Apple's UI des

Finally get the sample booklet. Although I had guessed it would be a very thick book (630,000 words), I was surprised when I actually saw the physical book:The picture below looks more intuitive than Alan. J. Marcus's Investment Studies (634 pages) are also thicker:This book does contain many of the author's efforts, as the book features:The book is an innovative combination of language and framework, divided into two parts, the first part is the introduction of

Swift Programming Language -- Optional chain (Optional Chaining), swiftoptional Optional Chaining is a process that allows you to request and call attributes, methods, and subscripts, its self-sufficiency is reflected in that the current request or call target may be null (nil ). If the self-determined target has a value, the call will succeed. On the contrary, if the selected target is null (nil), the call

Book Description “About a year ago, noticing that Apple had not updated Objective-C much over the past few years, I got intimations that they were working on a new language or framework for iOS development, and even suggested it to my friends at work. They laughed and said, “Then you will have to write your book from scratch.” They were right; this edition is almost a whole new book”Excerpt From: Vandad Nahavandipoor. “iOS 8 Swift

Switch as an essential statement in the selection structure is also added to Swift, as long as people with programming experience are not unfamiliar with switch statements, but Apple has greatly enhanced the switch to have features that are not available in other languages. Using the switch statement is simple: var i = 0 switch I {case 0: "0"//Output Case 1: "1" Default: "2" }

Validates the type ' type conversion ' of an instance in Swift language programming. It is used to check whether an instance type belongs to a particular superclass or subclass or its own hierarchy definition. Swift type conversion provides two operators: "Is" checks the type of the value and ' as ' converts the type value to a different type value. Type convers

The UbuConSummit2016 summit has come to an end, and many Ubuntu developers have returned to work to continue their great development journey. According to foreign media SoftPedia, the developer DidierRoche released a new version of the tumake tool today. Many new features have been added to the latest version 16.01.2, such as support for Apple's open-source Swift programming language, use the ldquo; umakes

First create a single view project for SwiftThen create the OC file directly in the project:Then select the OC language and ask if you want to automatically create intermediate files for OC and Swift:Then there are three files in the project folder:Now an example is written in the OC header file and the implementation file:Then in the swift language and the Obje...ridging-header.h fileYou can then use it directly in the

A protocol defines a blueprint for the methods, attributes, and other requirements that are needed for a particular task or function. The protocol itself does not provide an implementation of these requirements, it simply describes a blueprint for the implementation of a task or function. A protocol is similar to an interface definition in the Java language, which describes what an implementation can do, but does not itself contain any implementations. Unlike interfaces, the

The swift Programming Language Reading Notes on the seventh page contains two main content: print the output and how to comment out code 1 in swift how to print the value of variables and constants? Use the println function. For details, the println function outputs a line feed in addition to the variable constant value. 1) print the constant eg1 let hW = "Hello

How to Build the swift language development environment ~ Helping the customer's house make up fat makes it possible to build a swift language programming environment. SWIFT, a new development language released by Apple in 2014 WWDC, is a required language for Apple developers ~ -- Preparations 1. You need an Apple C

in the Swift Programming (http://www.maiziedu.com/course/ios/16-161/) , we all encounter these two questions, how to turn characters into classes and code to create a control method, the following specific explanation of these two points of knowledge Get the namespace before you use the classUsing JSON to get the class name of the character type and then create the class object, it is necessary to use the

property, because the type itself cannot be assigned a value for the Type property during initialization by using the constructor.Type attribute syntaxIn C or objective-c, static constants and static variables are defined by a specific type plus globalkeyword. In the Swift programming language, a type attribute is written as part of a type definition in curly braces of the outermost type, so its scope is w

A For loop is a loop control structure that can be effectively written to perform a specific number of loops. GrammarThe syntax for the For loop in the Swift programming language is: Copy Code code as follows: For Init; Condition increment{ Statement (s) } The following is the process control in a loop: Initializing the init step is performed first and only once. In this step, y

Reference Link: http://blog.csdn.net/huangchentao/article/details/352786631. Establishment of an OC project (Mixtureocandswift)2. Create a class of OC (OcTest)3. Created a swift class (swifttest) when creating this class, Xcode prompts you to create a mixtureocandswift-bridging-header.h file, select Create4. If you want to use Swifttest in Octest:?4.1-> in Mixtureocandswift-bridging-header.h add #import "OcTest.h" (this must be added, otherwise, the f

instead} definition of instance method in Protocol Protocol RandomNumberGenerator {Func random ()-> Double}The RandomNumberGenerator protocol does not care how the return value is generated, it only emphasizes the creation of a double type value After introducing the definition of the methods and attributes of the protocol, briefly mention the other features of the SWIFT protocol

Asynchronous Get Mode1 //MARK:-Asynchronous Get Mode2 func asynchronousget ()3 {4 //Create a Nsurl object5var url:nsurl! = Nsurl (string:"http://m.weather.com.cn/data/101010100.html")6 7 //Create Request Object8var urlrequest:nsurlrequest = nsurlrequest (Url:url, CachePolicy:NSURLRequestCachePolicy.UseProtocolCachePolicy, timeOutInterval:Ten)9 Ten //connecting to a server Onevar connection = Nsurlconnection (Request:urlrequest,Delegate: Self) A