在 Swift3.x 版本中一个很不错的简化，就是将获取系统时间由 NSDate() 修改为 Date()，可千万不要认为只是改了个名称这样简单，这使得代码更加简洁。
使用 Date() 获取当前系统时间：
let date = Date()
分离年月日：
let calendar = Calendar.current var year = calendar.component(.year, from: date) var month = calendar.component(.month, from: date) var day = calendar.component(.day, from: date)
分离后，既可以使用一般的语句进行时间的比较。
以下是判定 今天是不是我生日 的代码实例(Playground)：
//: Playground - noun: a place where people can play
import UIKit
let myBirthday = (1996, 5, 3)
var birthYear = 0
let date = Date()
let calendar = Calendar.current
var year = calendar.component(.year, from: date)
var month = calendar.component(.month, from: date)
var day = calendar.component(.day, from: date)
if month == myBirthday.1 {
if day == myBirthday.2 {
birthYear = year - 1996
print("It's my \(birthYear)'s birthday 👑")
}
}
Great, yahoo took me stright here. thanks btw for post. Cheers!