[IOS] Swift3 Inheritance 개념

import UIKit

//** Inheritance

//** extends개념과 동일

class Car {

    var numWheels = 4

    

    //** 初期化

    init(numWheels: Int) {

        self.numWheels = numWheels

    }

}

//** Like extends

//** Car classのnumWheelsがextends

class FamilyCar: Car {

    var numDoors = 5

}

//** FamilCar classのnumDoorsがextends

//** Car classのnumWheelsがextends

class BigFamilyCar: FamilyCar {

    var size = "Large"

}

//** Object生成

var myFamCar = FamilyCar(numWheels: 6)

myFamCar.numWheels

myFamCar.numDoors

//** extendsしたClassの内に初期化関数(init)のパラメーターがあると入力が必要。

var bigFamCar = BigFamilyCar(numWheels: 2)

bigFamCar.size