swift学习

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// main.swift

// mySwift

// Created by 鹏何 on 15/7/7.

import Foundation

var hello = "Hello, World!" //变量是定义

var s:Int = 5; //变量是定义

var mystring = "\(hello)\(s)" //字符串连接

var testvar = ["test","test2","test3",5]

var testdic = ["test":"1","test2":3]

testdic["test3"] = 4

//循环

for uindex in 0...100 {

//判断

if uindex % 2 == 0 {

testvar.append("item \(uindex)")

testdic[("test\(uindex)")] = uindex

}

for varvalue in testvar { //遍历数组

// println(varvalue)

}

for (key,value) in testdic { //遍历字典

println("\(key) = \(value)")

}

func syhell( name:String ){

println( name )

}

//必须先定义

syhell("test")

//函数也是变量可以把函数当成变量来执行

var testfun = syhell

testfun("test2")

//可以返回多个值

func getnumber() -> ( Int,String ) {

return (2,"test")

}

//接收返回值的类型

let(a,b) = getnumber()

println(a)

//定义类

class test1 {

var _name:String

//构造函数

init (name:String){

_name = name;

}

func syshelltest1(){

println("test:\(_name)");

}

var mytest1 = test1(name: "test1")

mytest1.syshelltest1 ( )

//继承

class test2 :test1 {

//方法重写

override func syshelltest1() {

println("test:\(_name)");

}

var mytest2 = test2(name: "test2")

mytest2.syshelltest1()

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