Swift学习笔记十三：继承

一、基本语法

class Human{
    var name :String
    init(){
        name = "human"
        println(name)
    }
    func description(){
        println("name:\(name)")
    }
}
class Student:Human{
    var score = 0
    init(){
        super.init()
        name = "Student"
        println(name)
    }
    override func description(){
        super.description()
        println("score:\(score)")
    }
}

class Human{
    var name :String
    init(){
        name = "human"
    }
    func description(){
        println(name)
    }
}
class Student:Human{
    override var name:String{
    willSet{
        println("will set \(newValue)")
    }
    }
    override func description()
    {
        println("Student name:\(name)")
    }
}
var a = Student()
a.name = "小笨狼"      //输出：will set 小笨狼
a.description()       //输出：Student name:小笨狼

@final class Human{ //① 在class前加@final，此类将不可被继承
    @final var name :String //② 在属性前加@final，属性将不可被重写
    init(){
        name = "human"
    }
    @final func description(){  //③ 在方法前加@final，方法将不可被重写
        println(name)
    }
}

Swift学习笔记十三：继承,布布扣,bubuko.com

Swift学习笔记十三：继承

原文：http://blog.csdn.net/xbenlang/article/details/32129641