苹果的WWDC ，除了公布了os x 10.10 和IOS8 外，还推出了Swift。具体点击这里

代码整体风格有点像Java，也有点像javascript。

以下给出一些代码段（来自苹果官方手冊）：

println("Hello, world")

“var myVariable = 42

myVariable = 50

let myConstant = 42”

摘录来自: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l

“var shoppingList = ["catfish", "water", "tulips", "blue paint"]

shoppingList[1] = "bottle of water"

var occupations = [

    "Malcolm": "Captain",

    "Kaylee": "Mechanic",

]

occupations["Jayne"] = "Public Relations”

摘录来自: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l

“let vegetable = "red pepper"

switch vegetable {

case "celery":

    let vegetableComment = "Add some raisins and make ants on a log."

case "cucumber", "watercress":

    let vegetableComment = "That would make a good tea sandwich."

case let x where x.hasSuffix("pepper"):

    let vegetableComment = "Is it a spicy \(x)?"

default:

    let vegetableComment = "Everything tastes good in soup."

}

”

摘录来自: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l

“class NamedShape {

    var numberOfSides: Int = 0

    var name: String

    init(name: String) {

        self.name = name

    }

    func simpleDescription() -> String {

        return "A shape with \(numberOfSides) sides."

    }

}”

摘录来自: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l

“class Square: NamedShape {

    var sideLength: Double

    init(sideLength: Double, name: String) {

        self.sideLength = sideLength

        super.init(name: name)

        numberOfSides = 4

    }

    func area() ->  Double {

        return sideLength * sideLength

    }

    override func simpleDescription() -> String {

        return "A square with sides of length \(sideLength)."

    }

}

let test = Square(sideLength: 5.2, name: "my test square")

test.area()

test.simpleDescription()”

摘录来自: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l