2.Swiftクラスとインタフェースの詳細

//   
class Me{
    var _name:String?="???"

    init(){
    }

    init(name:String){
        self._name = name
    }

    func say(){
        print("Me: \(self._name)")
    }

    //     
    class func classfunc(){
        print("static class func")
    }

}

//   
class SuperCat: Me {
    //     say()
    override func say() {
        super.say()
        print("SuperCat: \(self._name)")
    }
}

//       ( Me         superSay)
extension Me{
    func superSay(){
        print("extension class")
    }
}

//       （  ）
protocol Interface{
    func info()->String
}

//      
class Implement:Interface{
    func info() -> String {
        return "implement"
    }
}

print(" ======    ======",terminator: "
") var m1 = Me() var m2 = Me(name:"CaMnter") m1.say() m2.say() Me.classfunc() print(" ======    ======",terminator: "
") var sc = SuperCat(name: "CaMnter") sc.say() print(" ======        ======",terminator: "
") sc.superSay() print(" ======    ======",terminator: "
") var i2 = Implement() print("\(i2.info())")

 ======    ======
Me: Optional("???")
Me: Optional("CaMnter")
static class func
 ======    ======
Me: Optional("CaMnter")
SuperCat: Optional("CaMnter")
 ======        ======
extension class
 ======    ======
implement