Swif基础语法01

import Foundation

/**

*  1，第一个swift程序

*/

println("Hello, World!")

/**

*  2，定义常量

*/

let cInteger:Double =12.00

/**

*  3，定义变量

*/

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 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])

] ="kebe"

println("数组:\(array)")

//定义一个类型不确定的空数组

var array2 = []

,]

println(array2)

println])

/**

*  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 = [:]

::]

println(dict2)

/**

*  7。流程控制

*/

,,,,,]

for soretin
dataArray{

if soret >
{

sore +=

}else{

sore -=

}

}

println(sore)

;

forvar i =
;i <;++i{

count +=
;

}

println("count=\(count)")

for iin
... {

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){

,3.3)

}

//let a = getPrice()

println("\(getPrice())")

/**

*  函数能够接受可变參数,收集到一个数组中

*/

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

var sum =

for number
in numbers{

sum += number

}

return sum

}

let suma =sumof()

,,)

println("suma=\(suma)")

println("sumb =\(sumb)")

/**

*  对象和类

*/

class Shape {

var numberOfSides =

func simpleDescriptio()->String{

return"A shape wiht
\(numberOfSides)"

}

}

var shape =Shape()

shape

let shapDes =
shape.simpleDescriptio()

println("shapDes =\(shapDes)")

/**

*  使用init构造器来实例一个类

*/

class Shape1 {

var numberOfSides =

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)")