Method Requirements - Swift Programming

Protocols can require conforming types to implement methods.

Require a method

method_requirements.swift

protocol Summarizable {
    func summary() -> String
}

struct Ticket: Summarizable {
    let id: Int
    let owner: String

    func summary() -> String {
        return "#\(id) \(owner)"
    }
}

let ticketId = 
let ticket = Ticket(id: ticketId, owner: "Ada")
let summary = ticket.summary()

print(summary)

protocol Summarizable {
    func summary() -> String
}

struct Ticket: Summarizable {
    let id: Int
    let owner: String

    func summary() -> String {
        return "#\(id) \(owner)"
    }
}

let ticketId = 
let ticket = Ticket(id: ticketId, owner: "Ada")
let summary = ticket.summary()

print(summary)

protocol Summarizable {
    func summary() -> String
}

struct Ticket: Summarizable {
    let id: Int
    let owner: String

    func summary() -> String {
        return "#\(id) \(owner)"
    }
}

let ticketId = 
let ticket = Ticket(id: ticketId, owner: "Ada")
let summary = ticket.summary()

print(summary)

method requirement A method requirement describes the method signature that each conforming type must implement.