Swif基础语法01

import Foundation

/**

* 1，第一个swift程序

*/

println("Hello,World!")

/**

* 2，定义常量

*/

let a =10

let cInteger:Double =12.00

* 3，定义变量

*/

var b =0

b =11

var bFloat:Float

bFloat = 11.0

println(a)

* 4，类型转换（字符串的拼接）

let label = "The width is "

let width =94

let widthLabel =label + String(width)

//字符串的拼接

let widthLabel1 ="(label)(width)"

println(widthLabel)

println("类型转换:(widthLabel1)")

* 5，定义数组

var array = ["hehe","haha","nimei"]

println(array)

println(array[0])

array[0] ="kebe"

println("数组:(array)")

//定义一个类型不确定的空数组

var array2 = []

array2 = [1,2]

println(array2)

println(array2[1])

* 6，定义字典

var dictionary = ["xiaoming":"10","xiaohong":"8","xiaofang":"12"]

println(dictionary)

println(dictionary["xiaoming"])

dictionary["xiaoming"] ="20"

println(dictionary)

//定义一个类型不确定的空字典

var dict2 = [:]

dict2 = [2:"2",3:3]

println(dict2)

* 7，流程控制

*/

let dataArray = [1,2,3,4,5,6]

var sore =0

for soretin dataArray{

if soret > 3{

sore += 5

}else{

sore -= 2

}

}

println(sore)

var count =0;

forvar i = 0;i <3;++i{

count += 1;

}

println("count=(count)")

var firstForLoop =0

for iin 1...4 {

firstForLoop += i

}

println("firstForLoop=(firstForLoop)")

func greet(name:String,day:String)->String{

return"hello,(name),Today is (day)"

}

let look = greet("kobe","Monday")

println("(look)")

使用元组(tuple)来返回多个值

*/

func getPrice()->(Double,Int,Float){

return (3.33,3.3)

}

//let a = getPrice()

println("(getPrice())")

* 函数可以接受可变参数,收集到一个数组中

*/

func sumof(numbers:Int...)->Int{

var sum = 0

for number in numbers{

sum += number

}

return sum

}

let suma =sumof()

let sumb =sumof(12,12,123)

println("suma=(suma)")

println("sumb =(sumb)")

* 对象和类

*/

class Shape {

var numberOfSides = 0

func simpleDescriptio()->String{

return"A shape wiht (numberOfSides)"

}

}

var shape =Shape()

shape.numberOfSides =7

let shapDes = shape.simpleDescriptio()

println("shapDes =(shapDes)")

* 使用init构造器来实例一个类

*/

class Shape1 {

var numberOfSides = 0

var name:String

init(name:String){

self.name = name

}

func simpleDescriptio()->String{

return"A shape wiht (numberOfSides)"

}

}

var shape1 =Shape1(name: "wang")

println("shape1 =(shape1.name)")

（编辑：李大同）

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