原文:Swift的笔记和参考
好久没来了,趁着新语言Swift发布,继续钻研中!
Create Class 创建类 (多态效果)
// Create Class 创建类
class MyClass { // Properties 成员变量 init() {
// Constructor 构造函数
} // Method 成员方法
func doIt() {
println("doIt")
} func doIt() -> Int {
return
} 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 创建 / 使用 一个实例
var a = MyClass()
a.doIt("Wang ", b: "Zhipeng")
Enums 枚举
// Enums 枚举
enum ComcSoftType: Int { case DevelopmentEngineer = case TestEngineer = } var myType = ComcSoftType.DevelopmentEngineer
Declaring Variables 变量的声明 (可选变量)
// Declaring Variables 变量的声明
var mutableDouble:Double = 1.0
mutableDouble = 2.0 let constantDouble:Double = 1.0
//constantDouble = 2.0 Error 错误 var autoDouble = 1.0 // Optional Value 可选变量 (新机制)
var optionDouble:Double? //此刻 optionDouble 根本没有分配内存,对其取地址: &optionDouble 为NULL
optionDouble = 1.0 //这时候开始 optionDouble 才会开始分配内存 if let defineDouble = optionDouble {
println("已经分配内存")
}
else {
println("没有分配内存")
}
Control Flow 控制流
// Control Flow 控制流
var condition = true
if condition {
println("正确")
}
else {
println("错误")
} 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 .. {
println("\(i)")
}
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 = ""
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 数组的例子
// Array Quick Examples 数组的例子
var person1 = "One"
var person2 = "Two"
var array:String[] = [person1, person2]
array += "Three"
for person in array {
println("person: \(person)")
}
var personTwo = array[]
println("personTwo: \(personTwo)")
Dictionary Quick Examples 字典的例子
var dic:Dictionary<String, String> = ["One": "",
"Two": "",
"Three": ""]
dic["Three"] = "" // Update Three
dic["One"] = nil // Delete One
for(key, value) in dic {
println("key: \(key), value: \(value)")
}