尝试写swift 的扩展，发现元组是挺方便的
import Foundation
extension Date {
/*
* 获取这个月有多少天
*/
func getMonthHowManyDays() -> Int {
return (NSCalendar.current.range(of: .day, in: .month, for: self as Date)?.count)!
}
/*
* 获取日期是星期几
*/
func getDateWeekDay() -> NSInteger {
let dateFmt = DateFormatter.init()
dateFmt.dateFormat = "yyyy-MM-dd HH:mm:ss"
let interval = Int(self.timeIntervalSince1970)
let days = Int(interval/86400)
let weekday = ((days + 4)%7+7)%7
return weekday;
}
/*
* 获取这个月第一天是星期几
*/
func getMonthFirstWeekDay() ->Int {
//1.sun 2.Mon 3.Thes ... 7 sat
let calendar = Calendar.current
var com = calendar.dateComponents([.year,.month,.day], from: self as Date)
//设置成第一天
com.day = 1;
let date = calendar.date(from: com)
let firstWeekDay = calendar.ordinality(of: .weekday, in: .weekOfMonth, for: date!)
return firstWeekDay! - 1
}
/*
* 获取当前Year
*/
func getYear() ->Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.year,.month,.day], from: self as Date)
return com.year!
}
/*
* 获取当前Month
*/
func getMonth() -> Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.year,.month,.day], from: self as Date)
return com.month!
}
/*
* 获取当前Day
*/
func getDay() -> Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.year,.month,.day], from:self as Date)
return com.day!
}
/*
* 获取当前 hour
*/
func getHour() -> Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.hour,.minute,.second], from:self as Date)
return com.hour!
}
/*
* 获取当前 min
*/
func getMin() -> Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.hour,.minute,.second], from:self as Date)
return com.minute!
}
/*
* 获取当前 second
*/
func getSecond() -> Int {
let callendar = Calendar.current
let com = callendar.dateComponents([.hour,.minute,.second], from:self as Date)
return com.second!
}
/*
* 实用元组 获取当前 年，月，日
*
*/
func getYearMonthDay() ->(year:Int,month:Int,day:Int) {
let callendar = Calendar.current
let com = callendar.dateComponents([.year,.month,.day], from:self as Date)
return(com.year!,com.month!,com.day!)
}
/*
* 实用元组 获取当前 时,分,秒
*
*/
func getHourMinSec() ->(hour:Int,min:Int,sec:Int) {
let callendar = Calendar.current
let com = callendar.dateComponents([.hour,.minute,.second], from:self as Date)
return(com.hour!,com.minute!,com.second!)
}
/*
* 获取当前的 年-月-日
*/
func getCurrentDateStr() -> String {
let dateFmt = DateFormatter.init()
dateFmt.dateFormat = "yyyy-MM-dd"
return dateFmt.string(from: self as Date)
}
/*
* 获取当前的 年-月-日 时:分:秒
*/
func getCurrentTimeStr() -> String {
let dateFmt = DateFormatter.init()
dateFmt.dateFormat = "yyyy-MM-dd HH:mm:ss"
return dateFmt.string(from: self as Date)
}
}
使用
let date = Date.init()
// let year = date.getYear();
// let month = date.getMonth();
// let day = date.getDay();
//
// let hour = date.getHour()
// let min = date.getMin()
// let sec = date.getSecond()
let yearMonthDay = date.getYearMonthDay()
let year = yearMonthDay.year;
let month = yearMonthDay.month;
let day = yearMonthDay.day
let hourMinSec = date.getHourMinSec()
let hour = hourMinSec.hour
let min = hourMinSec.min
let sec = hourMinSec.sec
