extension NSDate{ func Year() -> Int { let curCalendar:NSCalendar = NSCalendar.currentCalendar() let componentYear:Int = curCalendar.component(NSCalendarUnit.Year, fromDate: self)

1.定义协议2.获取实体3.协议实现4.调用

//// ViewController.swift// Proclamation//// Created by on 16/12/15.// Copyright © 2016年 . All rights reserved.//import UIKitclass ViewController: UIViewController,UITableViewDelegate,