关于苹果开发语言，苹果开发语言语法好奇怪这个很多人还不知道，今天小周来为大家解答以上的问题，现在让我们一起来看看吧！

苹果开发语言(苹果开发语言语法好奇怪)苹果开发语言(苹果开发语言语法好奇怪)


苹果开发语言(苹果开发语言语法好奇怪)


1、在很多企业网络中，为了追求速度和安全，Linux作系统不仅仅是被网络运维人员当作使用，Linux既可以当作，又可以当作网络防火墙是Linux的 一大亮点。

2、Swift是什么？Swift is a new programming language for iOS and OS X apps that builds on the best of C and Objective-C, without the constraints of C compatibility. Swift adopts safe programming patterns and adds modern features to make programming easier, more flexible and more fun. Swift’s clean slate, backed by the mature and much-loved Cocoa and Cocoa Touch frameworks, is an opportunity to imagine how software dlopment works. Swift is the first industrial-quality s programming language that is as expressive and enjoyable as a scripting language.简单的说：Swift用来写iOS和OS X程序。

3、（估计也不会支持其它丝系统）Swift吸取了C和Objective-C的优点，且更加强大易用。

4、Swift可以使用现有的Cocoa和Cocoa Touch框架。

5、Swift兼具编译语言的高性能（Performance）和脚本语言的交互性（Interactive）。

6、Swift灵活的switch语言概览基本概念注：这一节的代码源自The Swift Programming Language中的A Swift Tour。

7、类似于脚本语言，下面的代码即是一个完整的Swift程序。

8、变量与常量Swift使用var声明变量，let声明常量var myVariable = 42 myVariable = 50 let myConstant = 42类型推导Swift支持类型推导（Type Inference），所以上面的代码不需指定类型，如果需要指定类型：let explicitDouble : Double = 70Swift不支持隐式类型转换（Implicitly casting），所以下面的代码需要显式类型转换（Explicitly casting）：let label = "The width is " let width = 94 let width = label + String(width)字符串格式化Swift使用()的形式进行字符串格式化：let apples = 3 let oranges = 5 let appleSummary = "I he (apples) apples." let appleSummary = "I he (apples + oranges) pieces of fruit."数组和字典Swift使用[]作符声明数组（array）和字典（dictionary）：var shoppingList = ["catfish", "water", "tulips", "blue paint"] shoppingList[1] = "bottle of water" var occupations = [ "Malcolm": "Captain", "Kaylee": "Mechanic", ] occupations["Jayne"] = "Public Relations"一般使用初始化器（initializer）语法创建空数组和空字典：let emptyArray = String[]() let emptyDictionary = Dictionary()控制流概览Swift的条件语句包含if和switch，循环语句包含for-in、for、while和do-while，循环/判断条件不需要括号，但循环/判断体（body）必需括号：let individualScores = [75, 43, 103, 87, 12] var teamScore = 0 for score in individualScores { if score > 50 { teamScore += 3 } else { teamScore += 1 } }结合if和let，可以方便的处理可空变量（nullable variable）。

9、对于空值，需要在类型声明后添加?显式标明该类型可空。

10、Swift中的switch支持各种各样的比较作：let vegetable = "red pepper" switch vegetable { case "celery": let vegetableComment = "Add some raisins and make ants on a log." case "cucumber", "watercress": let vegetableComment = "That would make a good tea sandwich." case let x where x.hasSuffix("pepper"): let vegetableComment = "Is it a spicy (x)?" default: let vegetableComment = "Everything tastes good in soup." }。

本文到这结束，希望上面文章对大家有所帮助。