swift语言初见
下面是swift得基础语法部分内容
// main.swift
// helloSwift
//
// Created by cyteven on 14-7-23.
// Copyright (c) 2014年 cyteven. All rights reserved.
//
import Foundation
//打印字符串
println("Hello, World!")
//变量定义
var a = 10
var b = 20
//常量定义
let c = a + b
println(c)
//变量类型定义
var i:Int = 4
var s:String ="i was string"
print(i)
println(s)
//字符串链接1
var helstr = "hello"
var tak = helstr + "hi"
println(tak)
//字符串链接2
var nNum = 1000
var sGood = "good"
var sResStr = "\(sGood)afasdfasfd\(nNum)"
println(sResStr)
//数组的使用
var attr = ["wocao","zahuishi",2000,12.4]
println(attr)
println(attr[0])
println(attr[1])
println(attr[2])
println(attr[3])
var attrStr = [String]()
//字典
var dict:Dictionary = ["name":"cyteven","age":26]
dict["class"] ="good"
dict["score"] =100
println(dict)
//if for
var start = 0
for start in 0...100 {
if start%2 == 0 {
println(start)
}
}
var myName:String? ="cyteven"
if let name = myName {
println("kaixin\(myName)")
}
//函数
func sayToYou(name:String){
println("i want to say you\(name)")
}
sayToYou(" cyteven")
//有返回值得函数
func getTwoNum(index:Int)->(Int,Int){
var numArray1 = [0,1,2,3,4,5,6];
var numArray2 = [0,1,2,3,4,5,6];
return (numArray1[index],numArray2[index+1])
}
let (num1:Int,num2:Int) =getTwoNum(3)
println(num1+num2)
//函数定义为变量
var sayHello = sayToYou
sayHello("myname")
//swift面向对象
class myPet{
var _name:String
var _age:Int
init(name:String,age:Int){
self._name = name
self._age = age
}
func getPetAge()->(Int){
return self._age
}
func getPetName()->(String){
return self._name
}
}
var pet = myPet(name:"mengmengda",age: 2)
var petName:String =pet.getPetName()
var petAge:Int = pet.getPetAge()
println("my pet name is\(petName),it is\(petAge) years old")
//继承
class myDog:myPet{
var _color:String
init(name: String, age:Int,color:String){
self._color = color
super.init(name: name, age: age)
}
func getDogColor()->(String){
return self._color
}
override func getPetName() -> (String){
return ("wangwang \(self._name)")
}
}
var dog = myDog(name:"xiaoQ", age: 3, color: "black")
var dogName = dog.getPetName()
var dogAge = dog.getPetAge()
var dogColor = dog.getDogColor()
println("I have a \(dogColor) dog named \(dogName),its \(dogAge) years old.")
