好久沒來了，趁著新語言Swift發布，繼續鉆研中！

Create Class 創建類 （重載效果）

// Create Class 創建類 class MyClass {// Properties 成員變量 init() {// Constructor 構造函數 }// Method 成員方法 func doIt() {println("doIt")}func doIt() -> Int {return 0}func doIt(a:Int) -> Int {return a}func doIt(a:Int, b:Int) -> Int {return a + b}func doIt() -> String {return ""}func doIt(a:String) -> String {return a}func doIt(a:String, b:String) -> String {return a + b}}// Create / Using an Instance 創建 / 使用 一個實例 var a = MyClass() a.doIt("Wang ", b: "Zhipeng")

?

Enums 枚舉

// Enums 枚舉 enum ComcSoftType: Int {case DevelopmentEngineer = 1case TestEngineer = 2}var myType = ComcSoftType.DevelopmentEngineer

?

Declaring Variables 變量的聲明 （可選變量）

// Declaring Variables 變量的聲明 var mutableDouble:Double = 1.0 mutableDouble = 2.0let constantDouble:Double = 1.0 //constantDouble = 2.0 Error 錯誤 var autoDouble = 1.0// Optional Value 可選變量 （新機制） var optionDouble:Double? //此刻 optionDouble 根本沒有分配內存，對其取地址: &optionDouble 為NULL optionDouble = 1.0 //這時候開始 optionDouble 才會開始分配內存if let defineDouble = optionDouble {println("已經分配內存") } else {println("沒有分配內存") }

?

Control Flow 控制流

// Control Flow 控制流 var condition = true if condition {println("正確") } else {println("錯誤") }var val = "Four" switch val {case "One":"One"case "Two", "Three":"Two, Three"default:"default" }// omits upper value, use ... to include 省略了上限值，使用 ... 包括 for i in 0..3 {println("i = \(i)") }for var j = 0; j < 3; ++j {println("j = \(j)") }// While var n = 2 while n < 100 {n = n * 2 } println(n)var m = 2 do {m = m * 2 } while m < 100 println(m)

?

String Quick Examples 字符串的例子

// String Quick Examples 字符串的例子 var firstName = "Zhipeng" var lastName = "Wang" var helloString = "Hello, \(lastName) \(firstName)"var tipString = "2499" var tipInt = tipString.toInt()extension Double {init (string:String) {self = Double(string.bridgeToObjectiveC().doubleValue)} } tipString = "24.99" var tipDouble = Double(string:tipString)

?

Array Quick Examples 數組的例子

// Array Quick Examples 數組的例子 var person1 = "One" var person2 = "Two" var array:String[] = [person1, person2] array += "Three" for person in array {println("person: \(person)") } var personTwo = array[1] println("personTwo: \(personTwo)")

?

Dictionary Quick Examples 字典的例子 （泛型效果）

// Dictionary Quick Examples 字典的例子 var dic:Dictionary<String, String> = ["One": "1","Two": "2","Three": "3"] dic["Three"] = "4" // Update Three dic["One"] = nil // Delete One for(key, value) in dic {println("key: \(key), value: \(value)") }

?

Function 函數

// Function 函數 func getPirces() -> (Double, Double, Double) {return (1.1, 1.2, 1.3) // tuple 元組 } // 取出元組 var (one, two, three) = getPirces() println("One = \(one), Two = \(two), Three = \(three)")func getSum(numbers:Int...) -> Int {var sum = 0for number in numbers {sum += number}return sum } getSum() getSum(1, 3, 5, 7, 9)

?

函數嵌套

// 函數嵌套 func nestedFunction() -> Int {var x = 0// func add() {x += 1}// add()return x }

?

函數傳遞

// 函數傳遞 func makeIncrementer() -> (Int -> Int) {func addOne(number:Int) -> Int {return number + 1}return addOne }var increment = makeIncrementer() increment(1)func makeIncrementer2() -> ((String, String) -> String) {func and(a:String, b:String) -> String {return a + b}return and } var increment2 = makeIncrementer2() increment2("Wang ", "zhieng")func lessThanOne(number:Int) -> Bool {return number < 1 } func makeIncrementer3(list:Int[], condition:Int -> Bool) -> Bool {for number in list {if condition(number) {return true}}return false } makeIncrementer3([1,2,3,4,5], lessThanOne)

?

?Extends 繼承 (多態效果)

// Extends 繼承 (多態效果) println("======================= Extends 繼承") class People {// Eat 吃 func eat() {println("吃")}// Sleep 睡 func sleep() {println("睡")}// Work 工作 func work() {println("工作")}// Said 說 func said() {println("我是人")} }class Chinese:People {// Said 說override func said() {println("我是中國人")} }class Americans:People {// Said 說override func said() {println("我是美國人")} }class Alien {// Eat 吃 func unknown() {println("外星人")} }// 不支持多繼承 //class futureGenerations:Chinese, Americans { // Multiple inheritance from classes 'Chinese' and 'Americans' // // Said 說 // override func said() { // println("我是中國人和美國人的后代") // } //}// 多態 必要條件:1.繼承 2.重寫 3.父類引用指向子類對象 var people = People() people.said() people = Chinese() people.said() people = Americans() people.said() //people = Alien() Error 'Alien' is not convertible to 'People' //people.said() var chinese = Chinese() chinese.said()var americans = Americans() americans.said()

?

轉載于:https://www.cnblogs.com/thefeelingofsimple/p/3768725.html

總結

以上是生活随笔為你收集整理的Swift的笔记和参考的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。