//看门狗经典场景解释代理委托机制
//
// ViewController.swift
// ProtocolDelegate
//
// Created by sz on 16/1/1.
// Copyright (c) 2016年 sz. All rights reserved.
//
import UIKit
//自定义一个协议
protocol HouseSecurityDelegate {
func handleIntruder()
}
//持有遵守协议者(代理人)的主人
class House: NSObject {
var delegate:HouseSecurityDelegate?
var name:String?
func burglarDetected()
{
print("im " + name!)
println(" i need a dog")
delegate?.handleIntruder()
}
}
//代理方--才狗! 汪汪 !(注意Swift遵守协议是继承语法,是冒号)
//看门狗类继承了NSObject,HouseSecurityDelegate
//Swift在你对协议的必选方法未实现时会报错(does not conform to)
class GuardDog: NSObject,HouseSecurityDelegate {
//遵守原则,谁继承,谁实现方法
func handleIntruder() {
println("614 im saito")
}
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let myhouse = House()
myhouse.name = "louise"
myhouse.burglarDetected()
let saito = GuardDog()
myhouse.delegate = saito
myhouse.burglarDetected()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
