最近在新的项目中用了很多关于时间计算的东西，各种需求也是让人难受的不行，其中也遇到不少关于时区的坑，特此前来总结一下关于date的常用延展方法，以后还会陆续补充
把当前时间转换成当前时区
func passDate() -> Date{
let zone = NSTimeZone.system
let time:Int = zone.secondsFromGMT(for: self)
let nowDate = self.addingTimeInterval(TimeInterval(time))
return nowDate
}
date转字符串
/// - Parameters:
/// - date: 某天
/// - string: 时间格式
/// - Returns: string
func getSomeDayToString(date:Date,string:String) -> String {
let nowDate = date
let timeZone = TimeZone.init(identifier: "UTC")
let formatter = DateFormatter()
formatter.timeZone = timeZone
formatter.locale = Locale.init(identifier: "zh_CN")
formatter.dateFormat = string
return formatter.string(from: nowDate)
}
获取某天的指定时间
/// - Parameter time: 时间 （19：00）
/// - Returns: date
func getCurrentDaySomeTime(time:String,someday:Date) -> Date {
let timeZone = TimeZone.init(identifier: "UTC")
let formatter = DateFormatter()
formatter.timeZone = timeZone
formatter.locale = Locale.init(identifier: "zh_CN")
formatter.dateFormat = "yyyy年MM月dd日"
var today = formatter.string(from: someday)
today = today + " " + time
let newformatter = DateFormatter()
newformatter.dateFormat = "yyyy年MM月dd日 HH:mm"
newformatter.timeZone = timeZone
newformatter.locale = Locale.init(identifier: "zh_CN")
let newDate = newformatter.date(from: today)!
return newDate
}
date转时间戳
func dateToTimestamp(date:Date) -> TimeInterval {
let invale = date.timeIntervalSince1970
return invale
}
获取周六晚上七点的时间
func getSatdayNight()->Date{
let gmt = NSTimeZone(abbreviation: "GMT")
let gregorian = NSCalendar(identifier: .gregorian)
gregorian?.timeZone = gmt as! TimeZone
var components = gregorian?.components([ .weekday,.day,.hour,.minute,.second], from: self)
components?.setValue(6 - (components?.weekday)!, for: .weekday)
components?.setValue(1, for: .day)
components?.setValue(19 - (components?.hour)! - 1, for: .hour)
components?.setValue(60 - (components?.minute)! - 1, for: .minute)
components?.setValue(60 - (components?.second)!, for: .second)
return (gregorian?.date(byAdding: components!, to: self, options: NSCalendar.Options(rawValue: 0))!)!
}
昨天
func getLastDay() ->Date {
let calendar = NSCalendar.init(identifier: .gregorian)
var comps = calendar?.components(.day, from: self)
comps?.setValue(-1, for: .day)
return (calendar?.date(byAdding: comps!, to: self, options: NSCalendar.Options(rawValue: 0))!)!
}
前三天
func getLastThreeDay() ->Date {
let calendar = NSCalendar.init(identifier: .gregorian)
var comps = calendar?.components(.day, from: self)
comps?.setValue(-2, for: .day)
return (calendar?.date(byAdding: comps!, to: self, options: NSCalendar.Options(rawValue: 0))!)!
}
今天稍后两小时
func getTodaylater() -> Date{
let calendar = NSCalendar.init(identifier: .gregorian)
var comps = calendar?.components(.hour, from: self)
comps?.setValue(2, for: .hour)
return (calendar?.date(byAdding: comps!, to: self, options: NSCalendar.Options(rawValue: 0))!)!
}
比较当前时间和指定时间
/// - Parameter customDate: 要比较的时间
/// - Returns: 早于当前时间返回YES，否则NO
func compareTime(customDate:Date) -> Bool {
let isTrue:ComparisonResult = self.passDate().compare(customDate)
if isTrue == ComparisonResult.orderedAscending {
return true
}else{
return false
}
}
网友评论