我在学习Swift的时候,发现官方的语言介绍文章(The Swift Programming Language)还是非常浅显易懂,虽然是英文,不过代码及分析说明都很到位,就是内容显得比较多一些,而我们作为技术人员,一般看代码就很好了解了各种语法特点了,基于这个原因,我对官网的案例代码进行了一个摘要总结,以代码的方式进行Swift语言的语法特点介绍,...
1import UIKit23var str ="Hello, playground"45var myVariable =426myVariable =507let myConstant =4289let implicitInteger =7010let implicitDouble =70.011let explicitDouble: Double =7012let explicitFloat: Float =41314let label ="The width is"15let width =9416let widthLabel = label +String(width)...
Swift防止了在需要使用Bool类型的地方使用了非布尔值,下面的例子会报告一个编译时错误: leti=1ifi{// this example will not compile, and will report an error// 这个例子不会通过编译,会报错} 下面是可以正常编译的: leti=1ifi==1{// this example will compile successfully// 这个例子会编译成功} Tuple...
“A constant or variable must have the same type as the value you want to assign to it. However, you don’t always have to write the type explicitly. Providing a value when you create a constant or variable lets the compiler infer its type. In the example above, the compiler infers th...
2 变量可修改而常量在第一次"赋值"完成后不可再被赋值（修改）eg1: var x = 12 x = 13 (\/) => 编译器允许 eg2: let language = "Swift"language = "Objective-C " (X) => 报错
Swift is a powerful and intuitive programming language for all Apple platforms. It’s easy to get started using Swift, with a concise-yet-expressive syntax and modern features you’ll love. Swift code is safe by design and produces software that runs lightning‑fast....
Swift is a high-performance system programming language. It has a clean and modern syntax, offers seamless access to existing C and Objective-C code and frameworks, and is memory safe by default.Although inspired by Objective-C and many other languages, Swift is not itself a C-derived ...
Syntax is tuned to make it easy to define your intent — for example, simple three-character keywords define a variable (var) or constant (let). How can I start learning Swift programming? Swift is a powerful and intuitive programming language for macOS, iOS, watchOS, and tvOS. Writing ...
Enter your favorite programming language: Swift Your favorite programming language is Swift. In the above example, we are asking users to input values. Notice the code, let name = readLine() Here, the readLine() takes input from the user and assigns it to the name variable. The readLine()...