Protocol Example - 2 : Medium blog

ProtocolExample2.swift

import Foundation

protocol Displayable {
    func displayName()
}

class Person {
    var name: String
    init(name: String) {
        self.name = name
    }
}

extension Person: Displayable {
    func displayName(){
        print("I am \(self.name).")
    }
}

//How to use? (playground)
let iOSDev = Person(name: "Hitendra iDev")
iOSDev.displayName() //This will display "I am Hitendra iDev"

This is just a simple protocol and class example for the medium blog - Protocol - The power of Swift

https://medium.com/p/950c85bb69b1